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CAS No. : | 881-07-2 | MDL No. : | MFCD00006764 |
Formula : | C10H8N2O2 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | UHPGVDHXHDPYQP-UHFFFAOYSA-N |
M.W : | 188.18 | Pubchem ID : | 13433 |
Synonyms : |
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Signal Word: | Danger | Class: | 8 |
Precautionary Statements: | P261-P280-P305+P351+P338 | UN#: | 1759 |
Hazard Statements: | H302-H315-H318-H335 | Packing Group: | Ⅲ |
GHS Pictogram: |
* 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 |
---|---|---|
90% | With hydrogenchloride; zinc(II) chloride; In water; toluene; at 50℃; for 3h; | Place 150 mL of 30% HCl, 0.01 mol of zinc chloride and 13.8 g (0.1 mol) of 2-nitroaniline in a three-necked flask, and add 0.15 mol of crotonaldehyde (13 mL, dissolved in 100 mL) slowly while stirring at 50 C with stirring. Toluene). After the addition was complete reaction was continued for 3h, cooled, the organic layer was separated and the aqueous layer was adjusted to pH about 3 Na2CO3, filtered off with suction, the filtrate was adjusted to pH continue with Na2CO3 about 7, filtered off with suction and washed with distilled water, naturally dried to give 16.9 g light yellow Product, yield 90%. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
98.6% | With bromine; sodium acetate; acetic acid; at 20 - 85℃; for 5.5h; | 2-Methyl-8-nitroquinoline (3a) (28.2 g, 0.15 mol) was suspended in glacial acetic acid (600 mL) saturated with anhydrous sodium acetate (~20 C), followed by a dropwise addition of a solution of bromine (80 g, 0.5 mol) in glacial acetic acid (200 mL) with stirring over 5 h. The reaction temperature was maintained within 20-25 C. Then, the mixture was heated to 85 C and allowed to stand at this temperature for 30 min and poured into water (2.5 L). A precipitate formed was filtered and washed with cold (10-12 C) water (2*60 mL) on the filter to obtain practically pure product. The yield was 62.85 g (98.6% on theoretical), m.p. 118-118.5 C. Found (%): C, 28.43; H, 1.40; N, 6.8. C10H5Br3N2O2. Calculated (%): C, 28.27; H, 1.19; Br, 56.42;N, 6.59; O, 7.53. 1H NMR, delta: 7.65-7.75 (m, 1 H, C(6)H); 8.09-(d, 1 H, C(5)H, J= 9.0 Hz); 8.13 (d, 1 H, C(4)H, J= 8.0 Hz); 8.36-8.38 (m, 2 H, C(3)H + C(7)H). MS, m/z (I/Imax(%)): 345 (100), 299 (20), 286 (20), 265 (15). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With iodine; dimethyl sulfoxide; at 110℃; for 1h; | General procedure: In a 25 mL round bottom flask equipped with a magnetic stir bar, The 2-methylquinoline (80 mg, 0.56 mmol) was dissolved in DMSO (4 mL) and molecular iodine (20 mol%)) was added and heated at 110 C for 1 h. Next, o-phenylenediamine (0.56 mmol) was added and the resulting solution stirred continuous for 7 h. After this time, the reaction mixture was cooled to room temperature, quenched with saturated solution of Na2S2O3 (20 mL) and the reaction was extracted with ethyl acetate (3x 20 mL). The combined organic phase was dried over anhydrous Na2SO4 and concentrated under reduced pressure. The residue was purified by chromatography on silica gel using Petroleum ether as eluent to provide 3a-u and 5a-g. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With potassium tert-butylate; N,N,N-trimethylhydrazinium iodide; In dimethyl sulfoxide; at 20℃; for 1h; | (o) 2-Methyl-8 -nitroquinolin-7-amine[00458] To a solution of <strong>[881-07-2]2-methyl-8-nitroquinoline</strong> (1.88 g, 10 mmol) and 1,1,1- trimethylhydrazinium iodide (3.03 g, 15 mmol) in anhydrous dimethyl sulfoxide (20 mL) was added potassium tert-butoxide as a solid (3.36 g, 30 mmol). The mixture was stirred at room temperature for 1 h. The mixture was then poured into saturated aqueous ammonium chloride, and extracted with EtOAc. The organic layer was concentrated and purified by column chromatography to give 2-methyl-8-nitroquinolin-7-amine as a yellow solid (300 mg).MS (ESI): m/z 204 (M+H)+. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
37%; 22% | With N-chloro-succinimide; 2,2'-azobis(isobutyronitrile); In tetrachloromethane; for 1h;Reflux; | To a solution of 1 equiv of 5 in carbon tetrachloride was added 3 equiv of N-chlorosuccinimide and a catalytic quantity of azoisobutyronitrile. The mixture was stirred and heated under reflux for 1 h. A residue was eliminated by filtration and the organic layer was dried over anhydrous Na2SO4 and concentrated in vacuo.Compound 6 was obtained after purification by silica gel column chromatography (eluent: petroleum ether/diethyl ether 1:1) as a pale yellow solid in 22% yield; mp 156 C, Lit: 156 C [33]. 1H NMR (200 MHz, CDCl3) delta: 4.84 (s, 2H), 7.58-7.66 (m, 1H), 7.80 (d, J = 8.6 Hz, 1H), 8.00-8.05 (m, 2H), 8.29 (d, J = 8.6 Hz, 1H). 13C NMR (50 MHz, CDCl3) delta: 46.9 (CH2), 122.2 (CH), 123.8 (CH), 125.6 (CH), 128.1 (C), 131.5 (CH), 137.2 (CH), 138.5 (C), 159.5 (C). The quaternary carbon atom bearing the nitro group was not observed under these experimental conditions. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
65% | With bromine; sodium acetate; acetic acid; for 1h;Reflux; | A refluxed solution of acetic acid was saturated with hydrated sodium acetate. 1 equiv of 5 was then added followed by 2.5 equiv of bromine and the reaction mixture was stirred for 1 h. Water was then added and the reaction mixture was extracted with dichloromethane. The organic layer was dried over anhydrous Na2SO4 and concentrated in vacuo.Compound 12 was obtained, after purification by column chromatography (eluent: dichloromethane), as a yellow solid in 65% yield; mp 182 C, Lit: 183 C [35]. 1H NMR (200 MHz, CDCl3) delta: 6.76 (s, 1H), 7.62-7.70 (m, 1H), 8.03-8.07 (m, 2H), 8.12-8.16 (m, 1H), 8.35-8.39 (m, 1H). 13C NMR (50 MHz, CDCl3) delta: 41.4 (CH), 121.7 (CH), 124.3 (CH), 126.5 (CH), 128.5 (C), 131.4 (CH), 136.8 (C), 138.1 (CH), 148.3 (C), 160.6 (C). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
78% | With choline chloride; citric acid; at 80℃; for 2h; | General procedure: 2-Methylazaarene (0.5 mmol) and electron-deficient olefin (0.75mmol) were dissolved in DES (0.5 mL). The mixture was stirred at 80 C for 2 h. Then 10 mL of water was added to the reaction mixture. The resulting mixture was extracted by EtOAc (10 mL) for 3 times. The combined organic phase was concentrated under reduced pressure and the residue was purified by silica gel column chromatography to give the corresponding product. |
71% | With pepsin; In dimethyl sulfoxide; at 60℃; for 60h;Green chemistry; Enzymatic reaction; | General procedure: A sealable reaction tube, equipped with a magnetic stirrer bar, was charged with 2-methylazaarene (1 mmol), electron-deficient olefin (1.4 mmol), pepsin (20 mg), and DMSO (2 mL). The reaction vessel was heated to 60 C. After stirring the mixture for 60 h, the reaction solution was purified by silica gel plates using petroleum ether/EtOAc as an eluent to isolate the corresponding product |
54% | In dimethyl sulfoxide; at 100℃; for 5h; | General procedure: Olefin (0.5 mmol, 1 equiv) and 2-methylazaarene (0.75 mmol, 1.5 equiv) were dissolved in 2 mL of DMSO. The mixture was stirred at 100C for 5 h. Then 10 mL of water was added to the reaction mixture. The resulting mixture was extracted by ethyl acetate (10 mL) for 3 times. The combined organic phase was concentrated under reduced pressure and the residue was purified by silica gel column chromatography to give the coupling products 3. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
80% | In water; at 102℃; for 0.416667h;Sealed tube; Microwave irradiation; Green chemistry; | General procedure: A sealed 10 mL glass tube containing nitrostyrene (1 equiv), methyl quinoline (1.5 equiv) and water (3 mL) was placed in the cavity of a microwave reactor and irradiated for the appropriate time, at 102 C (temperature monitored by a built-in infrared sensor), and power 150 W. After cooling to room temperature by an air-flow, the tube was removed from the rotor. The reaction mixture was diluted with water and extracted with ethyl acetate. The combined ethyl acetate extracts were then dried over Na2SO4 and after removal of the solvent the mixture was purified by (silica gel) column chromatography (hexane/AcOEt, 80:20 as eluent) to give pure products. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
85% | In water; at 102℃; for 0.333333h;Sealed tube; Microwave irradiation; Green chemistry; | General procedure: A sealed 10 mL glass tube containing nitrostyrene (1 equiv), methyl quinoline (1.5 equiv) and water (3 mL) was placed in the cavity of a microwave reactor and irradiated for the appropriate time, at 102 C (temperature monitored by a built-in infrared sensor), and power 150 W. After cooling to room temperature by an air-flow, the tube was removed from the rotor. The reaction mixture was diluted with water and extracted with ethyl acetate. The combined ethyl acetate extracts were then dried over Na2SO4 and after removal of the solvent the mixture was purified by (silica gel) column chromatography (hexane/AcOEt, 80:20 as eluent) to give pure products. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
75% | In water; at 102℃; for 0.416667h;Sealed tube; Microwave irradiation; Green chemistry; | General procedure: A sealed 10 mL glass tube containing nitrostyrene (1 equiv), methyl quinoline (1.5 equiv) and water (3 mL) was placed in the cavity of a microwave reactor and irradiated for the appropriate time, at 102 C (temperature monitored by a built-in infrared sensor), and power 150 W. After cooling to room temperature by an air-flow, the tube was removed from the rotor. The reaction mixture was diluted with water and extracted with ethyl acetate. The combined ethyl acetate extracts were then dried over Na2SO4 and after removal of the solvent the mixture was purified by (silica gel) column chromatography (hexane/AcOEt, 80:20 as eluent) to give pure products. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
63% | With toluene-4-sulfonic acid; In para-xylene; at 120℃; for 24h;Schlenk technique; | General procedure: TsOH (8.2 mg, 10 mol %), 2-methyl quinoline 1a (205 muL, 1.5 mmol), and benzaldehyde 2a (52 muL, 0.5 mmol) were mixed in a Schlenk tube and then dry p-xylene (0.8 mL) was added. The mixture was stirred at 120 C in a closed reaction vessel. The reaction was monitored by TLC. After completion of the reaction, the solvent was evaporated under reduced pressure and the residue purified by column chromatography on silica gel (eluent: petroleum ether/ethyl acetate) to give the desired product. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
75% | In water; at 102℃; for 0.466667h;Sealed tube; Microwave irradiation; | General procedure: General procedure: A sealed 10 mL glass tube containing aldhyde (1 equiv), methyl quinoline (1.8 equiv) and water (2 mL) was placed in the cavity of a microwave reactor and irradiated for the appropriate time, at 105 C (temperature monitored by a built-in infrared sensor), and power 160 W. After cooling to room temperature by an air-flow, the tube was removed from the rotor. The reaction mixture was diluted with water and extracted with ethyl acetate. The combined ethyl acetate extracts were then dried over anhydrous Na2SO4 and after removal of the solvent, the mixture was purified by (silica gel) column chromatography (hexane/AcOEt, 70:30 as eluent) to give pure products |
70% | With H2O4P(1-)*C4H7N2(1+); In 1,4-dioxane; water; at 100℃; for 24h;Schlenk technique; Sealed tube; | General procedure: A 25 mL Schlenk tube equipped with a magneticstirring bar was charged with2,6-lutidine (0.75 mmol, 3equiv.), p-nitro-benzaldehyde(0.25 mmol), dioxane/water(1:1, 1ml) and [Hmim][H2PO4](1equiv.).The tube was sealed and heated at 100 for 24h. Aftercompletion of the reaction, the resulting solution was extracted with ether (3×10 ml). The organic layer was dried with anhydrous Na2SO4,and concentrated under vacuum. The residue was chromatographed on a silica gelcolumn eluted with a mixture of petroleum ether and ethyl acetate (1:1) to givepure products (92%). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
72% | With iron(II) acetate; In 1,4-dioxane; at 120℃; for 24h;Schlenk technique; Inert atmosphere; | Fe(OAc)2 (3.1mg, 0.018mmol), 2-methyl quinoline (100mg, 0.70mmol), ethyl 3,3,3-trifluoropyruvate (60mg, 0.35mmol) were added in a Schlenk tube, the tube was closed and degassed three times with nitrogen gas, 1.0mL distilled 1,4-dioxane was injected by syringe, the mixture was stirred at 120C for 24h, after completion of the reaction, as monitored by TLC, the solvent was removed under reduced pressure, and the residue was purified by silica gel column chromatography to give the product 3a (94mg, 86%) as white solid. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
75% | With lanthanum pentafluorobenzoate; In toluene; at 120℃; for 24h; | General procedure: To a solution of 2-methylquinolines 1 (0.3 mmol), amines 2 (0.6 mmol), intoluene (0.5 mL) was added La(Pfb)3 (0.015 mmol). After being stirred at 120 oC for24 h, the mixture was evaporated under vacuum. The corresponding products wereisolated by silica gel column chromatography with petroleum ether/ethyl acetatemixture as eluent. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
82% | With indium(III) chloride; In 1,4-dioxane; at 120℃; for 0.5h;Microwave irradiation; | General procedure: Into a 2 mL microwave vial with a magnetic stirring bar were charged 2-methyl quinoline (1a, 107 mg, 0.75 mmol), (E)-1,4-diphenylbut-2-ene-1,4-dione (2a, 118 mg,0.5 mmol), InCl3 (11 mg, 10 mol %), and 1 mL of dry 1,4-dioxane. The mixture was microwave irradiated (Biotage Initiator microwave system EXP EU, part no.355301), at 120 C for 30 min. The mixture was filtered through a pad of Celite which was then washed with ethyl acetate and water. The organic phase was separated from the bilayer filtrate, washed with water, brine, and dried over anhydrous sodium sulphate. After evaporation, further purification was performed with flash chromatography (8-10% ethyl acetate in hexane) to get the pure product 3aa (165 mg, 87% isolated yield) as pale yellow solid; |
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