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CAS No. : | 2702-58-1 | MDL No. : | MFCD00017016 |
Formula : | C8H6N2O6 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | POGCCFLNFPIIGW-UHFFFAOYSA-N |
M.W : | 226.14 g/mol | Pubchem ID : | 222067 |
Synonyms : |
|
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P280-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302 | Packing Group: | N/A |
GHS Pictogram: |
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* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
88% | With diammonium sulfide In methanol for 5 h; Reflux | The solution of (NH4)2S23 used for this reaction was prepared by adding a solution of Na2S·9H2O (15.00g, 62.47mmol) in 100mL of MeOH to a suspension of NH4Cl (13.40g, 250.50mmol) in 100mL of MeOH and separating the solid material after 30min of stirring at room temperature. The resulting solution was added within 40min to a solution of 16 (6.20g, 27.42mmol) in 250mL of boiling MeOH and heated at reflux for 5h. After cooling down, the resulting precipitate of sulfur was filtered off and the pH was adjusted to 5 with 1M HCl and the solvent was removed under vacuum. The crude product was extracted with 250mL of AcOEt, washed with water, brine and dried over MgSO4 and concentrated in vacuo. Purification by silica gel column chromatography (30percent acetone in hexane) afforded pure product 17 (4.73g, 88percent) as an orange solid. 1H and 13C NMR data are in agreement with published data.24 1H NMR (400MHz, acetone-d6) δ: 7.93 (1H, dd, J 2.1, 1.4Hz, arom.), 7.71 (1H, t, J 2.2Hz, arom.), 7.67 (1H, dt J 2.2, 0.8Hz, arom.), 5.66 (2H, s, NH2), 3.91 (3H, s, OMe). 13C NMR (100MHz, acetone-d6) δ: 166.0, 151.1, 150.3, 133.1, 20.9, 112.2, 111.9, 52.8. Rf (30percent acetone/hexane) 0.37. MS(EI): m/z (percent)=197.1 (10), 196.1 (100, M+), 165.1 (33), 150.1 (20), 138.1 (8), 135.1 (22), 122.1 (35), 107.1 (17), 91.1 (23), 90.1 (10), 79.1 (8), 63.1 (20), 52.1 (9). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
99% | With thionyl chloride at 0 - 20℃; | 1.1.60 Example 1.1.60: 3-(aminomethyl)-5-methoxy-N,N-dimethylaniline; SOCl2 (3.4 ml, 5.61g, 47.1 mmol, 5 eq) was added dropwise to a stirred solution of 3,5-dinitrobenzoic acid (2.0 g, 9.43 mmol, 1 eq, Aldrich) in 20 ml anhydrous MeOH at 0 0C under Ar. The reaction was stirred at 0 0C to room temperature overnight. The solvent was removed in vacuo, and the residue was dissolved in EtOAc. The organic layer was washed with saturated aqueous NaHCO3 (x2), water (x3), brine (xl), and dried over Na2SO4. The inorganics were filtered off, and the solvent was removed in vacuo yielding 2.12 g (9.38 mmol, 99% yield) of methyl 3,5-dinitrobenzoate. |
98% | With Oxone In toluene at 60℃; for 48h; Green chemistry; | |
97% | With bis-(2-(1-adamantyl)ethyl) azodicarboxylate; triphenylphosphine In tetrahydrofuran; methanol at 20℃; |
97% | With sulfuric acid for 5h; Reflux; | 4.2.10. Methyl 3,5-dinitrobenzoate (16) To a stirred solution of 3,5-dinitrobenzoic acid (6.00g, 28.29mmol) in MeOH (100mL), conc. H2SO4 (3.0mL) was added dropwise and reaction mixture was heated at reflux for 5h. Completion of the reaction was followed by TLC (30% acetone in hexane). The solvent was removed under vacuum, and the crude product was extracted with AcOEt and the combined organic phases washed with water and then the pH was adjusted to 4 with NaHCO3. The organic fraction was washed with brine and dried over MgSO4. Product 16 obtained as a white solid after evaporation of the solvent was pure and no further purification was necessary (6.20g, 97%). 1H and 13C NMR data are in agreement with published data.22 1H NMR (400MHz, acetone-d6) δ: 9.17-9.15 (1H, m, arom.), 9.08-9.05 (2H, m, arom), 4.05 (3H, s, OMe). 13C NMR (100MHz, acetone-d6) δ: 164.0, 149.8, 134.4, 129.8, 123.2, 53.8. MS(EI): m/z (%)=226.1 (8, M+), 197.1 (7), 196.1 (72), 195.0 (100), 181.1 (18), 149.0 (31), 133.1 (13), 103.1 (8), 75.1 (48), 74.1 (23), 63.1 (7). |
95% | With pyridine; N,N-dimethyl-formamide; chlorophosphoric acid diphenyl ester In dichloromethane 1.) 10 min, 2.) 1 h; | |
94% | With thionyl chloride for 3h; Ambient temperature; | |
94% | With sulfuric acid for 12h; | |
93% | With PhP(C6H4-p-(CH2)2C6F13)2; bis(3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl)diazo dicarboxylate In tetrahydrofuran | |
90% | With N,N-bis[2-oxo-3-oxazolidinyl]phosphorodiamidic chloride; triethylamine In dichloromethane for 1h; Ambient temperature; | |
89% | With alumina methanesulfonic acid at 80℃; for 0.133333h; Microwave irradiation; | Representative Procedure for Preparation of Aromatic and Aliphatic Esters (Table 1) General procedure: In a typical reaction, AMA 2:3 (332 g, 0.6 mol), the corresponding carboxylicacid (1 mol), and alcohol (1.5-2 mol) were mixed in the provided reaction glass tubeequipped with a screw cap and magnetic agitation until a wet mixture was achieved.The reaction mixture was irradiated with microwaves (Anton Parr Monowave 300reactor) at 80 C for 8 min or 120 C for 20 min. On cooling, the mixture was diluted with dichloromethane (41 mL), filtered under gravity, and washed with dichloromethane;then the filtrate was washed with Na2CO3 (ss) and water. The organic layerwas dried over Na2SO4, filtered, and concentrated under reduced pressure to give theester. |
60% | With thionyl chloride for 4h; Reflux; | |
With hydrogenchloride | ||
With pyridine; benzenesulfonyl chloride | ||
With pyridine; p-toluenesulfonyl chloride | ||
With phosphorus pentoxide 1.) 0-5 deg C, 2.) reflux, 3 h; Yield given. Multistep reaction; | ||
95 % Spectr. | With iron(III) sulfate; sulfuric acid for 2h; Heating; | |
With sulfuric acid | II.A A. A. Preparation of Methyl 3,5-Dinitrobenzoate (I) STR10 In a 72-liter, round-bottomed flask equipped with mechanical stirrer and condenser were combined methyl alcohol (27.97 kg, 873 moles, 35.4 liters), 3,5-dinitrobenzoic acid (15 kg, 70.72 moles), and sulfuric acid (2.6 kg, 26.56 moles, 1.42 liters). The mixture was heated and stirred at reflux by means of a heating mantle for approximately 26 hours and then was allowed to cool to 25° (approximately 18 hours). The precipated solid was isolated by centrifugation (Tolhurst 12-in. centrifuge); each of the four loads collected was washed with methyl alcohol (4 liters). The wet solid was air dried for 16-18 hours to give 14.7 kg (92% of theory) of methyl 3,5-dinitrobenzoate (I). Tlc analysis (toluene/acetone/HOAc; 90/5/2; utilizing a plate marketed by Mallinckrodt under the trade designation ChromAR 7GF plate) showed the product to be homogenous and identical to an authentic sample. | |
With sulfuric acid Reflux; | ||
With thionyl chloride for 4h; Reflux; | ||
With sulfuric acid for 5h; Reflux; | General procedure: Synthesis of triazoles: Substituted benzoic acid (0.01mol) in 0.2 mol of anhydrous methanol and 0.5 mL of conc. H2SO4 was added in a round bottom flask and then refluxed for 5 h. The resultant compound was confirmed by TLC (hexane:ethyl acetate) in the ratio 80:20 and then required compound was isolated by treating with NaOH. Then 0.01 mol of substituted methyl benzoate in 25 mL of ethanol was taken in a round bottom flask. The solution was refluxed for 4 h by adding 0.7 mL of 0.15 mol N2H4. The product was confirmed by TLC (hexane:ethyl acetate) in the ratio 80:20 and distilled off ethanol and it is cooled in ice water. The resultant compound was recrystallized with EtOH (78 % yield). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
88% | With diammonium sulfide; In methanol; for 5h;Reflux; | The solution of (NH4)2S23 used for this reaction was prepared by adding a solution of Na2S·9H2O (15.00g, 62.47mmol) in 100mL of MeOH to a suspension of NH4Cl (13.40g, 250.50mmol) in 100mL of MeOH and separating the solid material after 30min of stirring at room temperature. The resulting solution was added within 40min to a solution of 16 (6.20g, 27.42mmol) in 250mL of boiling MeOH and heated at reflux for 5h. After cooling down, the resulting precipitate of sulfur was filtered off and the pH was adjusted to 5 with 1M HCl and the solvent was removed under vacuum. The crude product was extracted with 250mL of AcOEt, washed with water, brine and dried over MgSO4 and concentrated in vacuo. Purification by silica gel column chromatography (30% acetone in hexane) afforded pure product 17 (4.73g, 88%) as an orange solid. 1H and 13C NMR data are in agreement with published data.24 1H NMR (400MHz, acetone-d6) delta: 7.93 (1H, dd, J 2.1, 1.4Hz, arom.), 7.71 (1H, t, J 2.2Hz, arom.), 7.67 (1H, dt J 2.2, 0.8Hz, arom.), 5.66 (2H, s, NH2), 3.91 (3H, s, OMe). 13C NMR (100MHz, acetone-d6) delta: 166.0, 151.1, 150.3, 133.1, 20.9, 112.2, 111.9, 52.8. Rf (30% acetone/hexane) 0.37. MS(EI): m/z (%)=197.1 (10), 196.1 (100, M+), 165.1 (33), 150.1 (20), 138.1 (8), 135.1 (22), 122.1 (35), 107.1 (17), 91.1 (23), 90.1 (10), 79.1 (8), 63.1 (20), 52.1 (9). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
98% | for 1h; Reflux; | 4.5. 3,5-Dinitrobenzohydrazide (21) [22] Methyl 3,5-dinitrobenzoate was obtained in a 98% yield byrefluxing 3,5-dinitrobenzoyl chloride in MeOH for 1 h. Upon cooling,the precipitated product was filtered and washed with 1%NaOH. In the next step, hydrazine hydrate (80%, 0.94 g, 0.91 mL,15 mmol) was added dropwise into the solution of methyl 3,5-dinitrobenzoate (1.13 g, 5 mmol) in EtOH (20 mL) at 0 °C. The reactionmixture was stirred for 4 h at rt. Upon completion, theprecipitated product was filtered and washed with EtOH (10 mL)and Et2O (10 mL). The product was used without further purification. |
87% | With triethylamine In tetrahydrofuran Reflux; | |
With pyridine; benzene |
With pyridine In dichloromethane at -20℃; for 1h; | ||
at 0 - 5℃; | ||
4.73 g | With N-ethyl-N,N-diisopropylamine for 1h; Cooling with ice; | 34 Example 34: Methyl 3,5-dinitrobenzoate In methanol (100 mL) was dissolved 3,5-dinitrobenzoyl chloride and diisopropylethylamine (4.53 mL) was added thereto while cooling with ice. The reaction solution was stirred for 1 hour and then the solvent was distilled off. The resulting substance was diluted with ethyl acetate, sequentially washed with water and a saturated sodium chloride solution and dried over anhydrous magnesium sulphate before distillation of the solvent to give the titled compound (4.73 g) having the following physical properties. TLC: Rf 0.31 (hexane:ethyl acetate = 5:1). |
2.19 g | With triethylamine In dichloromethane at 0℃; Inert atmosphere; | General Procedure of Derivatization General procedure: To a 50 mL round bottom flask with Et3N 12 mmol (1.21 g), CH3OH 1.2 equimolar (The amount of CH3OH depends on the number of acyl chloride groups contained in the substrate, 0.38 g CH3OH per acyl chloride group), CH2Cl2 10mL was added at 0°C. The acyl chloride 10 mmol was dissolved in CH2Cl2 5 mL and slowly added dropwise to the round bottom flask under N2 atmosphere through a syringe, the reaction mixture was maintained at -0°C, after completion of the reaction monitored by TLC, removed excess solvent, washed the residue with water 20 mL to obtain the crude product. The crude product was further purified by silica gel column chromatography (200-300 mesh), and n-hexane and ethyl acetate were used as eluents. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With 2,6-dimethylpyridine at 80℃; for 48h; Yield given. Yields of byproduct given; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
96% | With 2,6-dimethylpyridine at 125℃; for 96h; Yields of byproduct given; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With 2,6-dimethylpyridine at 125℃; for 48h; Yield given. Yields of byproduct given; | ||
With 2,6-dimethylpyridine at 96℃; for 24h; Yield given. Yields of byproduct given; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
83% | With hydrazine hydrate monohydrate In ethanol at 0 - 20℃; for 4h; | Synthesis of compound (I). Synthesis of compound (I). A solution of methyl3,5-dinitrobenzoate (10 mmol, 2.2614 g) was added toa 100 mL round-bottom flask containing ethanol(40 mL) at 0°C. 80% hydrazine hydrate (30 mmol,1.82 mL) was added dropwise to this stirred solution.The resultant mixture was stirred for 4 h at RT. Uponcompletion of the reaction, the precipitated productwas filtered and rinsed thoroughly with 20 mL of ethanoland 20 mL of diethyl ether. The product acquiredwas employed without further purification [31]. |
With hydrazine hydrate monohydrate | ||
With hydrazine hydrate monohydrate In methanol |
With hydrazine hydrate monohydrate In ethanol at 0 - 20℃; for 4h; | 4.5. 3,5-Dinitrobenzohydrazide (21) [22] Methyl 3,5-dinitrobenzoate was obtained in a 98% yield byrefluxing 3,5-dinitrobenzoyl chloride in MeOH for 1 h. Upon cooling,the precipitated product was filtered and washed with 1%NaOH. In the next step, hydrazine hydrate (80%, 0.94 g, 0.91 mL,15 mmol) was added dropwise into the solution of methyl 3,5-dinitrobenzoate (1.13 g, 5 mmol) in EtOH (20 mL) at 0 °C. The reactionmixture was stirred for 4 h at rt. Upon completion, theprecipitated product was filtered and washed with EtOH (10 mL)and Et2O (10 mL). The product was used without further purification.Yield: 84% as a yellowish solid; mp 153-154 °C (lit. [22] mp155-157 °C). 1H NMR (300 MHz, DMSO) δ 10.50 (s, 1H, NH), 9.00 (d,J 2.1 Hz, 2H), 8.93 (t, J 2.1 Hz, 1H), 4.74 (s, 2H, NH2). 13C NMR(75 MHz, DMSO) δ 161.50,148.38,136.09,127.36,120.84. Anal. Calcdfor C7H6N4O5: C, 37.18; H, 2.67; N, 24.77. Found: C, 37.42; H, 2.68; N,24.32. | |
With hydrazine hydrate monohydrate In ethanol at 70℃; | ||
With hydrazine In ethanol for 4h; Reflux; | General procedure: Synthesis of triazoles: Substituted benzoic acid (0.01mol) in 0.2 mol of anhydrous methanol and 0.5 mL of conc. H2SO4 was added in a round bottom flask and then refluxed for 5 h. The resultant compound was confirmed by TLC (hexane:ethyl acetate) in the ratio 80:20 and then required compound was isolated by treating with NaOH. Then 0.01 mol of substituted methyl benzoate in 25 mL of ethanol was taken in a round bottom flask. The solution was refluxed for 4 h by adding 0.7 mL of 0.15 mol N2H4. The product was confirmed by TLC (hexane:ethyl acetate) in the ratio 80:20 and distilled off ethanol and it is cooled in ice water. The resultant compound was recrystallized with EtOH (78 % yield). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
90% | With sodium hydroxide In N,N-dimethyl-formamide for 0.5h; Ambient temperature; | |
86% | With potassium hydroxide In methanol at 35℃; for 0.0333333h; | |
85% | With lithium chloride In N,N-dimethyl-formamide for 0.166667h; Microwave irradiation; chemoselective reaction; |
With water at 69.84℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
94% | With toluene-4-sulfonic acid In benzene |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
84% | With indium; iodine for 32h; Heating; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
49% | With palladium diacetate; tetrabutylammomium bromide; potassium carbonate In N,N-dimethyl-formamide at 100℃; for 120h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
74% | With palladium diacetate; tetrabutylammomium bromide; tetra-(n-butyl)ammonium iodide; potassium carbonate In N,N-dimethyl-formamide at 100℃; for 72h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
1: 16% 2: 7% | With 1,8-diazabicyclo[5.4.0]undec-7-ene In acetonitrile at 20℃; for 6h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Stage #1: 3,5-dinitrobenzoic acid With 1,3,5-trichloro-2,4,6-triazine; potassium carbonate In tetrahydrofuran; acetonitrile at 0℃; for 2.75h; Stage #2: diazomethane In diethyl ether at 0 - 20℃; for 12h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
24% | Stage #1: methyl 3,5-dinitrobenzoate With potassium borohydride In methanol; dimethyl sulfoxide at 0 - 3℃; for 0.666667h; Stage #2: 4-nitrobenzenediazonium tetrafluoroborate In methanol; dimethyl sulfoxide for 0.5h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
17% | Stage #1: methyl 3,5-dinitrobenzoate With potassium borohydride In methanol; dimethyl sulfoxide at 0 - 3℃; for 0.666667h; Stage #2: 4-(dimethylamino)benzenediazonium tetrafluoroborate In methanol; dimethyl sulfoxide for 0.5h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
42% | Stage #1: methyl 3,5-dinitrobenzoate With potassium borohydride In tetrahydrofuran; water at 5 - 15℃; for 0.25h; Stage #2: formaldehyd; glycine In tetrahydrofuran; water |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
60% | With hydrogenchloride In acetone |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
97% | With potassium carbonate In acetonitrile for 5h; Heating; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
90% | Stage #1: (hydroxymethyl)dimethylphenylsilane With potassium <i>tert</i>-butylate; tetramethylurea at 20 - 25℃; Stage #2: 3,5-dinitrobenoyl chloride With pyridine In tetrahydrofuran at 50℃; for 1.5h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 3 steps 1: 87 percent / PhP(O)Cl2; PCl5 / 15 h / Heating 2: 94 percent / NaOCH3 / 0 - 20 °C 3: 60 percent / HCl / acetone | ||
Multi-step reaction with 2 steps 1: 4-(N,N-dimethylamino)pyridinium chlorosulphite chloride / CH2Cl2 / 0.25 h / -20 °C 2: pyridine / CH2Cl2 / 1 h / -20 °C | ||
Multi-step reaction with 3 steps 1: triethylamine / CH2Cl2 / 0.5 h / Ambient temperature 2: triphenylphosphine dibromide / CH2Cl2 / 0.17 h / Ambient temperature 3: 2-oxo-3-trimethylsilyltetrahydro-1,3-oxazole / 0.25 h / Ambient temperature |
Multi-step reaction with 3 steps 1: triethylamine / CH2Cl2 / 0.5 h / Ambient temperature 2: triphenylphosphine dibromide / CH2Cl2 / 0.17 h / Ambient temperature 3: CH2Cl2 / 10 h / 10 °C | ||
Multi-step reaction with 2 steps 1: thionyl chloride / Reflux 2: 0 - 5 °C | ||
Multi-step reaction with 2 steps 1: thionyl chloride; sulfuric acid / 0.28 h / Inert atmosphere; Reflux 2: triethylamine / dichloromethane / 0 °C / Inert atmosphere |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: triphenylphosphine dibromide / CH2Cl2 / 0.17 h / Ambient temperature 2: 2-oxo-3-trimethylsilyltetrahydro-1,3-oxazole / 0.25 h / Ambient temperature | ||
Multi-step reaction with 2 steps 1: triphenylphosphine dibromide / CH2Cl2 / 0.17 h / Ambient temperature 2: CH2Cl2 / 10 h / 10 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
85% | In methanol; ethanolamine | 2.a a) a) Preparation of 3,5-dinitro-N-(2-hydroxyethyl)benzamide 750 g (3.32 moles) of methyl 3,5-dinitro benzoate are suspended in 2 liters of methanol in the presence of 222.7 g (3.65 moles) of ethanolamine. The reaction mixture is refluxed for 48 hours until the ester has disappeared. After 4 hours at room temperature, the crystalline product is filtered off, washed with 500 cm3 of methylene chloride, then dried in an oven at 60° C. in a vacuum for 4 hours. This procedure leads to the recovery of 718 g of product in a yield of 85% Melting point: 140° C. TLC (toluene/methyl ethyl ketone/formic acid (60/25/25) Rf: 0.5. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium methylate; sodium In methanol; ethyl acetate | Monomers: Methyl 3-methoxy-5-nitrobenzoate (7): Five (5) g (22 mmol) methyl 3,5-dinitrobenzoate (Aldrich) were suspended in 80 mL methanol (A.C.S. grade) and heated to reflux for app. 1 h under nitrogen, until a clear brown solution had formed. A simultaneously prepared sodium methoxide solution (prepared by portionwise addition of 0.76 g (33 mmol, 1.5 eq.) sodium to 10 mL methanol, the reaction flask was purged with nitrogen until all sodium had reacted) was added dropwise to the hot solution by syringe, each drop causing a deep red color. The reaction mixture was refluxed for an additional 15 h. After cooling to r.t., it was concentrated to dryness, the remaining brown-purple solid was taken up in 30 mL distilled water and acidified with 2 N HCl. The addition of ethyl acetate caused the present light orange solid to dissolve, phases were separated and extraction with ethyl acetate was repeated twice. The combined organic layers were washed with sat. aq. NaHCO3, with brine, then dried with MgSO4 and concentrated, leaving 3.7 g of a pale yellow solid. The crude product was purified by column chromatography (7:3 hexanes/ethyl acetate, Rf=0.6, UV; note: starting material coelutes but should be gone after the reaction time given) to afford 2.3 g (50%) of a light yellow solid. The procedure can be scaled up to 30 g starting material: depending on the course of the reaction, crude product material might be sufficiently pure to be carried on into the next step without further purification. mp 88-89° C. 2; 1H NMR (CDCl3) δ8.46 (dd, J1=1.5 Hz, J2=2.4 Hz, 1H), 7.92 (t, J1=2.4 Hz, J2=2.4 Hz, 1H), 7.88 (dd, J1=1.5 Hz, J2=2.4 Hz, 1H), 3.99 (s, 3H, OCH3), 3.95 (s, 3H, OCH3); 13C NMR (CDCl3) δ164.59, 160.00, 148.95, 132.37, 120.84, 116.36, 112.65, 56.02, 52.60. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
60% | In methanol Reflux; Inert atmosphere; | |
56% | Stage #1: methyl 3,5-dinitrobenzoate; lithium methanolate In methanol at 85℃; for 4h; Stage #2: With hydrogenchloride In methanol; water at 20℃; | 1.1.60 methyl 3,5-dinitrobenzoate (1.5 g, 6.63 mmol, 1 eq) in 10 ml anhydrous MeOH under Ar was heated to reflux at 85 0C. LiOMe (1.0 M in MeOH, 13.3 ml, 13.3 mmol, 2 eq) was added to the refluxing solution. After 4 h the reaction was cooled to room temperature, and the mixture was adjusted to pH ~ 3 with concentrated HCl. The solvent was removed in vacuo and the residue was dissolved in EtOAc. The organic layer was washed with saturated aqueous NaHCO3 (x2), water (x3), brine (xl), and dried over Na2SO4. The inorganics were filtered off, and the solvent was removed in vacuo. Purification via flash chromatography yielded 0.7705 g (3.70 mmol, 56% yield) of methyl 3-methoxy-5-nitrobenzoate. |
35% | In methanol for 12h; Reflux; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
99% | With palladium 10% on activated carbon; hydrogen In ethanol; ethyl acetate for 22h; Inert atmosphere; | |
92% | With palladium on activated charcoal; hydrogen In ethyl acetate for 72h; | |
67% | Stage #1: methyl 3,5-dinitrobenzoate With hydrogenchloride; 1,1,1,3',3',3'-hexafluoro-propanol; iron In water at 20℃; for 0.5h; Stage #2: With sodium hydrogencarbonate In water chemoselective reaction; | 2. General Procedure for the Reduction of Nitro Compounds General procedure: The nitro compound (1 equiv), HFIP (10 equiv), Fe powder (5 equiv) were mixed in a tube. Then 2 N HCl aqueous solutions was added to the reaction mixture. After stirring at room temperature for 30 min, the reaction mixture was neutralized with sat. NaHCO3 (aq.) and extracted with EtOAc three times. The combined organic layers were washed with brine, dried over Na2SO4, filtered, and concentrated under reduced pressure. The resulting crude product was then purified by column chromatography on silica gel to furnish the desired amine product. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
91% | In methanol; diethyl ether; toluene at 20℃; for 1h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
20% | Stage #1: methyl 3,5-dinitrobenzoate With caesium carbonate In dimethyl sulfoxide Stage #2: Trimethyl(methylthio)silane In dimethyl sulfoxide at 20℃; for 16h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
97% | Stage #1: methanol With lithium at 0℃; Inert atmosphere; Stage #2: methyl 3,5-dinitrobenzoate Reflux; Inert atmosphere; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 12 steps 1.1: lithium / 0 °C / Inert atmosphere 1.2: Reflux; Inert atmosphere 2.1: diisobutylaluminium hydride / dichloromethane / -78 °C / Inert atmosphere 3.1: sodium hydride / tetrahydrofuran; water / 0 - 20 °C / Inert atmosphere 3.2: 0 °C / Inert atmosphere 4.1: acetic acid / 1,2-dimethoxyethane / 24 h / 50 °C / Inert atmosphere 5.1: diisobutylaluminium hydride / toluene / -78 - 20 °C / Inert atmosphere 6.1: palladium 10% on activated carbon; hydrogen / ethyl acetate / 10 h / 20 °C 7.1: 1-[(1-(cyano-2-ethoxy-2-oxoethylidenaminooxy)dimethylamino-morpholino)]-uronium hexafluorophosphate; N-ethyl-N,N-diisopropylamine / N,N-dimethyl-formamide / 0.5 h / 20 °C / Inert atmosphere 7.2: 1 h / 20 °C / Inert atmosphere 8.1: 1H-imidazole; iodine; triphenylphosphine / dichloromethane / 0 - 20 °C / Inert atmosphere 9.1: acetonitrile / 12 h / Inert atmosphere 10.1: N,N-dimethyl-formamide / 12 h / 20 °C / Inert atmosphere; Molecular sieve 10.2: 0 - 20 °C / Inert atmosphere 10.3: 0.5 h / 20 °C / Inert atmosphere 11.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 0 - 20 °C / Inert atmosphere 12.1: triphenylphosphine; diethylazodicarboxylate / tetrahydrofuran; toluene / 4 h / 20 °C / Inert atmosphere |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 12 steps 1.1: lithium / 0 °C / Inert atmosphere 1.2: Reflux; Inert atmosphere 2.1: diisobutylaluminium hydride / dichloromethane / -78 °C / Inert atmosphere 3.1: sodium hydride / tetrahydrofuran; water / 0 - 20 °C / Inert atmosphere 3.2: 0 °C / Inert atmosphere 4.1: acetic acid / 1,2-dimethoxyethane / 24 h / 50 °C / Inert atmosphere 5.1: diisobutylaluminium hydride / toluene / -78 - 20 °C / Inert atmosphere 6.1: palladium 10% on activated carbon; hydrogen / ethyl acetate / 10 h / 20 °C 7.1: 1-[(1-(cyano-2-ethoxy-2-oxoethylidenaminooxy)dimethylamino-morpholino)]-uronium hexafluorophosphate; N-ethyl-N,N-diisopropylamine / N,N-dimethyl-formamide / 0.5 h / 20 °C / Inert atmosphere 7.2: 1 h / 20 °C / Inert atmosphere 8.1: 1H-imidazole; iodine; triphenylphosphine / dichloromethane / 0 - 20 °C / Inert atmosphere 9.1: acetonitrile / 12 h / Inert atmosphere 10.1: N,N-dimethyl-formamide / 12 h / 20 °C / Inert atmosphere; Molecular sieve 10.2: 0 - 20 °C / Inert atmosphere 10.3: 0.5 h / 20 °C / Inert atmosphere 11.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 0 - 20 °C / Inert atmosphere 12.1: triphenylphosphine; diethylazodicarboxylate / tetrahydrofuran; toluene / 4 h / 20 °C / Inert atmosphere |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 12 steps 1.1: lithium / 0 °C / Inert atmosphere 1.2: Reflux; Inert atmosphere 2.1: diisobutylaluminium hydride / dichloromethane / -78 °C / Inert atmosphere 3.1: sodium hydride / tetrahydrofuran; water / 0 - 20 °C / Inert atmosphere 3.2: 0 °C / Inert atmosphere 4.1: acetic acid / 1,2-dimethoxyethane / 24 h / 50 °C / Inert atmosphere 5.1: diisobutylaluminium hydride / toluene / -78 - 20 °C / Inert atmosphere 6.1: palladium 10% on activated carbon; hydrogen / ethyl acetate / 10 h / 20 °C 7.1: 1-[(1-(cyano-2-ethoxy-2-oxoethylidenaminooxy)dimethylamino-morpholino)]-uronium hexafluorophosphate; N-ethyl-N,N-diisopropylamine / N,N-dimethyl-formamide / 0.5 h / 20 °C / Inert atmosphere 7.2: 1 h / 20 °C / Inert atmosphere 8.1: 1H-imidazole; iodine; triphenylphosphine / dichloromethane / 0 - 20 °C / Inert atmosphere 9.1: acetonitrile / 12 h / Inert atmosphere 10.1: N,N-dimethyl-formamide / 12 h / 20 °C / Inert atmosphere; Molecular sieve 10.2: 0 - 20 °C / Inert atmosphere 10.3: 0.5 h / 20 °C / Inert atmosphere 11.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 0 - 20 °C / Inert atmosphere 12.1: triphenylphosphine; diethylazodicarboxylate / tetrahydrofuran; toluene / 4 h / 20 °C / Inert atmosphere |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 12 steps 1.1: lithium / 0 °C / Inert atmosphere 1.2: Reflux; Inert atmosphere 2.1: diisobutylaluminium hydride / dichloromethane / -78 °C / Inert atmosphere 3.1: sodium hydride / tetrahydrofuran; water / 0 - 20 °C / Inert atmosphere 3.2: 0 °C / Inert atmosphere 4.1: acetic acid / 1,2-dimethoxyethane / 24 h / 50 °C / Inert atmosphere 5.1: diisobutylaluminium hydride / toluene / -78 - 20 °C / Inert atmosphere 6.1: palladium 10% on activated carbon; hydrogen / ethyl acetate / 10 h / 20 °C 7.1: 1-[(1-(cyano-2-ethoxy-2-oxoethylidenaminooxy)dimethylamino-morpholino)]-uronium hexafluorophosphate; N-ethyl-N,N-diisopropylamine / N,N-dimethyl-formamide / 0.5 h / 20 °C / Inert atmosphere 7.2: 1 h / 20 °C / Inert atmosphere 8.1: 1H-imidazole; iodine; triphenylphosphine / dichloromethane / 0 - 20 °C / Inert atmosphere 9.1: acetonitrile / 12 h / Inert atmosphere 10.1: N,N-dimethyl-formamide / 12 h / 20 °C / Inert atmosphere; Molecular sieve 10.2: 0 - 20 °C / Inert atmosphere 10.3: 0.5 h / 20 °C / Inert atmosphere 11.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 0 - 20 °C / Inert atmosphere 12.1: triphenylphosphine; diethylazodicarboxylate / tetrahydrofuran; toluene / 4 h / 20 °C / Inert atmosphere |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 12 steps 1.1: lithium / 0 °C / Inert atmosphere 1.2: Reflux; Inert atmosphere 2.1: diisobutylaluminium hydride / dichloromethane / -78 °C / Inert atmosphere 3.1: sodium hydride / tetrahydrofuran; water / 0 - 20 °C / Inert atmosphere 3.2: 0 °C / Inert atmosphere 4.1: acetic acid / 1,2-dimethoxyethane / 24 h / 50 °C / Inert atmosphere 5.1: diisobutylaluminium hydride / toluene / -78 - 20 °C / Inert atmosphere 6.1: palladium 10% on activated carbon; hydrogen / ethyl acetate / 10 h / 20 °C 7.1: 1-[(1-(cyano-2-ethoxy-2-oxoethylidenaminooxy)dimethylamino-morpholino)]-uronium hexafluorophosphate; N-ethyl-N,N-diisopropylamine / N,N-dimethyl-formamide / 0.5 h / 20 °C / Inert atmosphere 7.2: 1 h / 20 °C / Inert atmosphere 8.1: 1H-imidazole; iodine; triphenylphosphine / dichloromethane / 0 - 20 °C / Inert atmosphere 9.1: acetonitrile / 12 h / Inert atmosphere 10.1: N,N-dimethyl-formamide / 12 h / 20 °C / Inert atmosphere; Molecular sieve 10.2: 0 - 20 °C / Inert atmosphere 10.3: 0.5 h / 20 °C / Inert atmosphere 11.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 0 - 20 °C / Inert atmosphere 12.1: triphenylphosphine; diethylazodicarboxylate / tetrahydrofuran; toluene / 4 h / 20 °C / Inert atmosphere |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 12 steps 1.1: lithium / 0 °C / Inert atmosphere 1.2: Reflux; Inert atmosphere 2.1: diisobutylaluminium hydride / dichloromethane / -78 °C / Inert atmosphere 3.1: sodium hydride / tetrahydrofuran; water / 0 - 20 °C / Inert atmosphere 3.2: 0 °C / Inert atmosphere 4.1: acetic acid / 1,2-dimethoxyethane / 24 h / 50 °C / Inert atmosphere 5.1: diisobutylaluminium hydride / toluene / -78 - 20 °C / Inert atmosphere 6.1: palladium 10% on activated carbon; hydrogen / ethyl acetate / 10 h / 20 °C 7.1: 1-[(1-(cyano-2-ethoxy-2-oxoethylidenaminooxy)dimethylamino-morpholino)]-uronium hexafluorophosphate; N-ethyl-N,N-diisopropylamine / N,N-dimethyl-formamide / 0.5 h / 20 °C / Inert atmosphere 7.2: 1 h / 20 °C / Inert atmosphere 8.1: 1H-imidazole; iodine; triphenylphosphine / dichloromethane / 0 - 20 °C / Inert atmosphere 9.1: acetonitrile / 12 h / Inert atmosphere 10.1: N,N-dimethyl-formamide / 12 h / 20 °C / Inert atmosphere; Molecular sieve 10.2: 0 - 20 °C / Inert atmosphere 10.3: 0.5 h / 20 °C / Inert atmosphere 11.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 0 - 20 °C / Inert atmosphere 12.1: triphenylphosphine; diethylazodicarboxylate / tetrahydrofuran; toluene / 4 h / 20 °C / Inert atmosphere |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 12 steps 1.1: lithium / 0 °C / Inert atmosphere 1.2: Reflux; Inert atmosphere 2.1: diisobutylaluminium hydride / dichloromethane / -78 °C / Inert atmosphere 3.1: sodium hydride / tetrahydrofuran; water / 0 - 20 °C / Inert atmosphere 3.2: 0 °C / Inert atmosphere 4.1: acetic acid / 1,2-dimethoxyethane / 24 h / 50 °C / Inert atmosphere 5.1: diisobutylaluminium hydride / toluene / -78 - 20 °C / Inert atmosphere 6.1: palladium 10% on activated carbon; hydrogen / ethyl acetate / 10 h / 20 °C 7.1: 1-[(1-(cyano-2-ethoxy-2-oxoethylidenaminooxy)dimethylamino-morpholino)]-uronium hexafluorophosphate; N-ethyl-N,N-diisopropylamine / N,N-dimethyl-formamide / 0.5 h / 20 °C / Inert atmosphere 7.2: 1 h / 20 °C / Inert atmosphere 8.1: 1H-imidazole; iodine; triphenylphosphine / dichloromethane / 0 - 20 °C / Inert atmosphere 9.1: acetonitrile / 12 h / Inert atmosphere 10.1: N,N-dimethyl-formamide / 12 h / 20 °C / Inert atmosphere; Molecular sieve 10.2: 0 - 20 °C / Inert atmosphere 10.3: 0.5 h / 20 °C / Inert atmosphere 11.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 0 - 20 °C / Inert atmosphere 12.1: triphenylphosphine; diethylazodicarboxylate / tetrahydrofuran; toluene / 4 h / 20 °C / Inert atmosphere |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 5 steps 1.1: lithium / 0 °C / Inert atmosphere 1.2: Reflux; Inert atmosphere 2.1: diisobutylaluminium hydride / dichloromethane / -78 °C / Inert atmosphere 3.1: sodium hydride / tetrahydrofuran; water / 0 - 20 °C / Inert atmosphere 3.2: 0 °C / Inert atmosphere 4.1: acetic acid / 1,2-dimethoxyethane / 24 h / 50 °C / Inert atmosphere 5.1: diisobutylaluminium hydride / toluene / -78 - 20 °C / Inert atmosphere |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 6 steps 1.1: lithium / 0 °C / Inert atmosphere 1.2: Reflux; Inert atmosphere 2.1: diisobutylaluminium hydride / dichloromethane / -78 °C / Inert atmosphere 3.1: sodium hydride / tetrahydrofuran; water / 0 - 20 °C / Inert atmosphere 3.2: 0 °C / Inert atmosphere 4.1: acetic acid / 1,2-dimethoxyethane / 24 h / 50 °C / Inert atmosphere 5.1: diisobutylaluminium hydride / toluene / -78 - 20 °C / Inert atmosphere 6.1: palladium 10% on activated carbon; hydrogen / ethyl acetate / 10 h / 20 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 7 steps 1.1: lithium / 0 °C / Inert atmosphere 1.2: Reflux; Inert atmosphere 2.1: diisobutylaluminium hydride / dichloromethane / -78 °C / Inert atmosphere 3.1: sodium hydride / tetrahydrofuran; water / 0 - 20 °C / Inert atmosphere 3.2: 0 °C / Inert atmosphere 4.1: acetic acid / 1,2-dimethoxyethane / 24 h / 50 °C / Inert atmosphere 5.1: diisobutylaluminium hydride / toluene / -78 - 20 °C / Inert atmosphere 6.1: palladium 10% on activated carbon; hydrogen / ethyl acetate / 10 h / 20 °C 7.1: 1-[(1-(cyano-2-ethoxy-2-oxoethylidenaminooxy)dimethylamino-morpholino)]-uronium hexafluorophosphate; N-ethyl-N,N-diisopropylamine / N,N-dimethyl-formamide / 0.5 h / 20 °C / Inert atmosphere 7.2: 1 h / 20 °C / Inert atmosphere |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
4.81 g | With potassium phosphate In N,N-dimethyl-formamide at 80℃; | 35 Example 35: Methyl 3-(4-fluorophenoxy)-5-nitrobenzoate The compound prepared in Example 34 (4.73 g) was dissolved in DMF (40 mL), added with 4-fluorophenol (2.34 g) and potassium phosphate (5.32 g) and stirred overnight at 80°C. The reaction solution was diluted with ethyl acetate, sequentially washed with water and a saturated sodium chloride solution and dried over anhydrous magnesium sulphate before distillation of the solvent. The resulting residue was purified by silica gel chromatography (hexane:ethyl acetate = 9:1 → 1:1) to give the titled compound (4.81 g) having the following physical properties. TLC: Rf 0.47 (hexane:ethyl acetate = 5:1). |
2 g | With potassium carbonate In N,N-dimethyl-formamide at 80℃; for 20h; | 93.A A) Methyl 3-(4-fluorophenoxy)-5-nitrobenzoate To a mixture of methyl 3,5-dinitrobenzoate (5.0 g) in DMF (50 mL) was added K2CO3 (5.7 g) and 4-fluorophenol (2.5 g), and the mixture was stirred at 80°C for 20 h. The reaction mixture was diluted with EtOAc, washed with water, washed with brine, dried over Na2SO4, concentrated, and purified by silica gel column chromatography (petroleum ether/ethyl acetate = 49/1 to 97/3 to 19/1) to give the target compound (2.0 g) as a solid. 1H NMR (400 MHz, DMSO-d6) d: 8.34 (s, 1H), 7.98 (br s, 1H), 7.79 (s, 1H), 7.44-7.22 (m, 4H), 3.90 (s, 3H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
72% | With 1,3-diazido-propane In neat (no solvent) at 20℃; for 0.333333h; | General procedure forthe synthesis of alkyl esters from trialkylphosphite (3a-v) General procedure: To a mixture oftrimethylphosphite/triethylphosphite (1.0mmol) and carboxylic acid (1.0mmol),1,3-diazidopropane (0.5mmol) was added slowly in a drop wise manner (to avoidaccumulation of azide) and the mixture was stirred at room temperature for10-20 minutes. (Caution As azides arepotentially explosive, all the reactions should be carried out behind a blastshield with personal protective equipment. In particular, the sequence of addition of thereactants should be strictly followed to avoid the accumulation of organicazides. This has been achieved in thepresent investigation by the slow drop wise addition of the bis azide to thereaction mixture containing trialkylphosphite during which the azide group isinstantaneously converted to iminophosphorane and hence no difficulty wasencountered). After the completion ofthe reaction (as monitored by TLC), the mixture was poured onto crushedice. Then the reaction mixture wasextracted with dichloromethane and the organic layer was dried over anhydrousNa2SO4. Thesolvent was removed and the residue was purified by column chromatography usingsilica gel as the adsorbent and petroleum ether: ethyl acetate (98:2) as themobile phase to afford the corresponding carboxylic esters (3a-v) as colourless oily liquids. Yield (71-80%) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
63% | With hydrazine hydrate In methanol for 4h; Reflux; | 4.10. 3-Amino-5-nitrobenzohydrazide (27) Methyl-3,5-dinitrobenzoate (1 g, 4.4 mmol) was dissolved inmethanol (20 mL), and 80% hydrazine hydrate (1.07 mL, 22 mmol)was added. The reaction mixture was refluxed for 4 h. The methanolwas evaporated under reduced pressure, and the crudeproduct was purified using column chromatography (mobilephase: CHCl3/MeOH/Et3N,100:1:1). Yield: 63% as a yellow solid; mp220-222 °C. 1H NMR (300 MHz, DMSO) δ 9.91 (s, 1H), 7.74e7.71 (m,1H), 7.48e7.45 (m, 1H), 7.38 (dd, J 2.3, 1.4 Hz, 1H), 6.00 (s, 2H),4.52 (s, 2H). 13C NMR (75 MHz, DMSO) δ 164.73, 150.32, 148.87,135.50, 118.63, 109.26, 108.16. Anal. Calcd for C, 42.86; H, 4.11; N,28.56. Found C, 43.07; H, 4.00; N, 28.42. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 3 steps 1: methanol / Reflux; Inert atmosphere 2: sodium hydroxide / methanol; dichloromethane / 3 h / 20 °C 3: sodium tetrahydroborate; boron trifluoride diethyl etherate / tetrahydrofuran / 1 h / 0 - 25 °C | ||
Multi-step reaction with 2 steps 1.1: methanol / 12 h / Reflux 2.1: sodium hydroxide / methanol; dichloromethane / 3 h / 20 °C 2.2: 1 h / 0 - 20 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 4 steps 1: methanol / Reflux; Inert atmosphere 2: sodium hydroxide / methanol; dichloromethane / 3 h / 20 °C 3: sodium tetrahydroborate; boron trifluoride diethyl etherate / tetrahydrofuran / 1 h / 0 - 25 °C 4: aluminum (III) chloride / dichloromethane / 5 h / 0 - 80 °C / Inert atmosphere | ||
Multi-step reaction with 3 steps 1.1: methanol / 12 h / Reflux 2.1: sodium hydroxide / methanol; dichloromethane / 3 h / 20 °C 2.2: 1 h / 0 - 20 °C 3.1: aluminum (III) chloride / dichloromethane / 5 h / Reflux |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 6 steps 1: methanol / Reflux; Inert atmosphere 2: sodium hydroxide / methanol; dichloromethane / 3 h / 20 °C 3: sodium tetrahydroborate; boron trifluoride diethyl etherate / tetrahydrofuran / 1 h / 0 - 25 °C 4: aluminum (III) chloride / dichloromethane / 5 h / 0 - 80 °C / Inert atmosphere 5: boron tribromide / dichloromethane / 12 h / 0 °C 6: palladium 10% on activated carbon; hydrogen / methanol; dichloromethane / 4 h / 20 °C | ||
Multi-step reaction with 4 steps 1.1: methanol / 12 h / Reflux 2.1: sodium hydroxide / methanol; dichloromethane / 3 h / 20 °C 2.2: 1 h / 0 - 20 °C 3.1: aluminum (III) chloride / dichloromethane / 5 h / Reflux 4.1: boron tribromide / dichloromethane / 12 h / -40 - 0 °C 4.2: 4 h |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
47% | With zinc(II) acetate dihydrate; acetic acid; zinc In water at 20℃; for 5h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
52% | With dipotassium peroxodisulfate; potassium carbonate In water; acetonitrile at 80℃; for 20h; |
Tags: 2702-58-1 synthesis path| 2702-58-1 SDS| 2702-58-1 COA| 2702-58-1 purity| 2702-58-1 application| 2702-58-1 NMR| 2702-58-1 COA| 2702-58-1 structure
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P410 | Protect from sunlight. |
P411 | |
P412 | Do not expose to temperatures exceeding 50 oC/ 122 oF. |
P413 | |
P420 | Store away from other materials. |
P422 | |
P402 + P404 | Store in a dry place. Store in a closed container. |
P403 + P233 | Store in a well-ventilated place. Keep container tightly closed. |
P403 + P235 | Store in a well-ventilated place. Keep cool. |
P410 + P403 | Protect from sunlight. Store in a well-ventilated place. |
P410 + P412 | Protect from sunlight. Do not expose to temperatures exceeding 50 oC/122oF. |
P411 + P235 | Keep cool. |
Disposal | |
Code | Phrase |
P501 | Dispose of contents/container to ... |
P502 | Refer to manufacturer/supplier for information on recovery/recycling |
Physical hazards | |
Code | Phrase |
H200 | Unstable explosive |
H201 | Explosive; mass explosion hazard |
H202 | Explosive; severe projection hazard |
H203 | Explosive; fire, blast or projection hazard |
H204 | Fire or projection hazard |
H205 | May mass explode in fire |
H220 | Extremely flammable gas |
H221 | Flammable gas |
H222 | Extremely flammable aerosol |
H223 | Flammable aerosol |
H224 | Extremely flammable liquid and vapour |
H225 | Highly flammable liquid and vapour |
H226 | Flammable liquid and vapour |
H227 | Combustible liquid |
H228 | Flammable solid |
H229 | Pressurized container: may burst if heated |
H230 | May react explosively even in the absence of air |
H231 | May react explosively even in the absence of air at elevated pressure and/or temperature |
H240 | Heating may cause an explosion |
H241 | Heating may cause a fire or explosion |
H242 | Heating may cause a fire |
H250 | Catches fire spontaneously if exposed to air |
H251 | Self-heating; may catch fire |
H252 | Self-heating in large quantities; may catch fire |
H260 | In contact with water releases flammable gases which may ignite spontaneously |
H261 | In contact with water releases flammable gas |
H270 | May cause or intensify fire; oxidizer |
H271 | May cause fire or explosion; strong oxidizer |
H272 | May intensify fire; oxidizer |
H280 | Contains gas under pressure; may explode if heated |
H281 | Contains refrigerated gas; may cause cryogenic burns or injury |
H290 | May be corrosive to metals |
Health hazards | |
Code | Phrase |
H300 | Fatal if swallowed |
H301 | Toxic if swallowed |
H302 | Harmful if swallowed |
H303 | May be harmful if swallowed |
H304 | May be fatal if swallowed and enters airways |
H305 | May be harmful if swallowed and enters airways |
H310 | Fatal in contact with skin |
H311 | Toxic in contact with skin |
H312 | Harmful in contact with skin |
H313 | May be harmful in contact with skin |
H314 | Causes severe skin burns and eye damage |
H315 | Causes skin irritation |
H316 | Causes mild skin irritation |
H317 | May cause an allergic skin reaction |
H318 | Causes serious eye damage |
H319 | Causes serious eye irritation |
H320 | Causes eye irritation |
H330 | Fatal if inhaled |
H331 | Toxic if inhaled |
H332 | Harmful if inhaled |
H333 | May be harmful if inhaled |
H334 | May cause allergy or asthma symptoms or breathing difficulties if inhaled |
H335 | May cause respiratory irritation |
H336 | May cause drowsiness or dizziness |
H340 | May cause genetic defects |
H341 | Suspected of causing genetic defects |
H350 | May cause cancer |
H351 | Suspected of causing cancer |
H360 | May damage fertility or the unborn child |
H361 | Suspected of damaging fertility or the unborn child |
H361d | Suspected of damaging the unborn child |
H362 | May cause harm to breast-fed children |
H370 | Causes damage to organs |
H371 | May cause damage to organs |
H372 | Causes damage to organs through prolonged or repeated exposure |
H373 | May cause damage to organs through prolonged or repeated exposure |
Environmental hazards | |
Code | Phrase |
H400 | Very toxic to aquatic life |
H401 | Toxic to aquatic life |
H402 | Harmful to aquatic life |
H410 | Very toxic to aquatic life with long-lasting effects |
H411 | Toxic to aquatic life with long-lasting effects |
H412 | Harmful to aquatic life with long-lasting effects |
H413 | May cause long-lasting harmful effects to aquatic life |
H420 | Harms public health and the environment by destroying ozone in the upper atmosphere |
Sorry,this product has been discontinued.
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