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CAS No. : | 7476-66-6 | MDL No. : | MFCD00040996 |
Formula : | C9H9ClO2 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | XOIOYHPJZJLTGK-UHFFFAOYSA-N |
M.W : | 184.62 | Pubchem ID : | 139032 |
Synonyms : |
|
Num. heavy atoms : | 12 |
Num. arom. heavy atoms : | 6 |
Fraction Csp3 : | 0.22 |
Num. rotatable bonds : | 3 |
Num. H-bond acceptors : | 2.0 |
Num. H-bond donors : | 0.0 |
Molar Refractivity : | 47.1 |
TPSA : | 26.3 Ų |
GI absorption : | High |
BBB permeant : | Yes |
P-gp substrate : | No |
CYP1A2 inhibitor : | Yes |
CYP2C19 inhibitor : | No |
CYP2C9 inhibitor : | No |
CYP2D6 inhibitor : | No |
CYP3A4 inhibitor : | No |
Log Kp (skin permeation) : | -5.52 cm/s |
Log Po/w (iLOGP) : | 2.17 |
Log Po/w (XLOGP3) : | 2.69 |
Log Po/w (WLOGP) : | 1.82 |
Log Po/w (MLOGP) : | 2.29 |
Log Po/w (SILICOS-IT) : | 2.37 |
Consensus Log Po/w : | 2.26 |
Lipinski : | 0.0 |
Ghose : | None |
Veber : | 0.0 |
Egan : | 0.0 |
Muegge : | 1.0 |
Bioavailability Score : | 0.55 |
Log S (ESOL) : | -2.85 |
Solubility : | 0.26 mg/ml ; 0.00141 mol/l |
Class : | Soluble |
Log S (Ali) : | -2.89 |
Solubility : | 0.235 mg/ml ; 0.00127 mol/l |
Class : | Soluble |
Log S (SILICOS-IT) : | -3.14 |
Solubility : | 0.134 mg/ml ; 0.000728 mol/l |
Class : | Soluble |
PAINS : | 0.0 alert |
Brenk : | 1.0 alert |
Leadlikeness : | 1.0 |
Synthetic accessibility : | 2.06 |
Signal Word: | Danger | Class: | 8 |
Precautionary Statements: | P264-P280-P301+P330+P331-P303+P361+P353-P304+P340-P305+P351+P338-P310-P321-P363-P405-P501 | UN#: | 3265 |
Hazard Statements: | H314 | Packing Group: | Ⅱ |
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 1,2,3-Benzotriazole; thionyl chloride In dichloromethane at 20℃; | |
87% | With thionyl chloride In diethyl ether for 24h; Ambient temperature; | |
62% | With N,N-dimethyl-formamide; 2-Fluorobenzoyl chloride In 1,4-dioxane at 80℃; for 36h; Sealed tube; | General procedure: Entry 5: According to general procedure II (chapter 2.1.2) racemic methyl mandelate (rac-132, 336 mg, 2.00 mmol, 1.0 equiv), DMF (30.9 ilL, 29.2 mg, 0.40 mmol, 20 mol%), dioxane (1 mL, 2 M)and 2-fluoro benzoyl chloride (372 ilL, 490 mg, 3.00 mmol, 1.5 equiv) were combined and allowed to react for 36 h at 80 C. Chromatographic purification of the crude material (540 mg, 232/332 86:14) on silica gel (mass of crude material/Si02 1:9) with Et20/nPen 5:95 gave rise of the chloride rac-232 ascolorless oil (227 mg, 1.23 mmol, 62%).M (C9H9C102) = 184.62 g/mol; rf (Si02, Et20/nPen 5:95) = 0.37; [aID2° = +134.1 (c = 1.48 g/100 mL,CHCI3). |
55% | With dmap; triethylamine; p-toluenesulfonyl chloride In dichloromethane at 0 - 15℃; for 12.5h; | |
With thionyl chloride | ||
With pyridine; trichlorophosphate <i>dl</i>-phenylchloroacetic acid methyl ester; | ||
4.9 g | With thionyl chloride for 0.5h; Heating; | |
With phosphorus pentachloride In dichloromethane at 20℃; for 2h; | ||
In dichloromethane; water | 1.a a) a) Synthesis of methyl chlorophenylacetate 1 For the synthesis of methyl chlorophenylacetate, 10.0 g (60 mmol) of methyl mandelate are dissolved in 10 ml of dichloromethane and, after addition of 4.79 ml (66 mmol, 1.1 equiv.) of thionyl chloride, warmed to 60° C. The mixture is stirred for 18 hours, the reaction solution is cooled to room temperature, a further 20 ml of dichloromethane are added, and the mixture is extracted twice each with 30 ml of water and saturated NaHCO3 solution. The organic phase is dried over sodium sulfate, and the reaction product is obtained after filtration and removal of the solvent by distillation. | |
With thionyl chloride In dichloromethane at 60℃; for 18h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With methanol; sodium methylate |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium methylate |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With copper; zinc; benzene Erwaermen des Reaktionsprodukts mit aethanol. Natronlauge; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With copper; zinc; benzene |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
95% | With triethylamine at 20℃; for 3h; | |
75% | With pyridine | |
With pyridine In benzene |
In dichloromethane for 48h; Inert atmosphere; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With phenol In 1,4-dioxane |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With pyridine In methanol |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium methylate In methanol |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydride In benzene |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydride In N,N,N,N,N,N-hexamethylphosphoric triamide |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydride In toluene |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
1: 76% 2: 56% |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium acetate In ethanol at 130℃; for 25h; Yield given; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium acetate In ethanol at 130℃; for 40h; Yield given; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium acetate In ethanol at 130℃; for 25h; Yield given; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
80% | With pyridine for 2h; steam-bath; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
94% | With chlorine; trimethyl orthoformate In methanol at 0℃; for 0.166667h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
1: 74% 2: 22% | With chlorine In chloroform ice-cooling; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
1: 18% 2: 42% | With trichloroisocyanuric acid; isocyanuric acid In N,N-dimethyl-formamide at 40℃; for 18h; | |
1: 42% 2: 18% | With trichloroisocyanuric acid In N,N-dimethyl-formamide at 40℃; for 18h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triphenylmethyl potassium In tetrahydrofuran; dimethyl sulfoxide comparative study of reaction with polymer bounded reagents; various cations (Li, Na, K) and solvents (THF, toluene, DMSO, DMF); | ||
With trityllithium In tetrahydrofuran at 20℃; | ||
With sodium hydride In benzene at 20℃; Title compound not separated from byproducts; |
With triphenylmethyl potassium In tetrahydrofuran; dimethyl sulfoxide; N,N-dimethyl-formamide at -60℃; | ||
With sodium hydride In N,N-dimethyl-formamide at 20℃; Title compound not separated from byproducts; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
59% | With potassium hydroxide In ethanol; water at 30℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium acetate In ethanol at 130℃; for 40h; Yield given; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With chromium dichloride; lithium iodide In tetrahydrofuran at 55℃; for 2h; Yield given. Yields of byproduct given; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydride 1.) THF, 2.) DMSO; Yield given. Multistep reaction; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
62% | With tris(triphenylphosphine)ruthenium(II) chloride; trifluoromethane sulfonyl chloride In benzene at 120℃; for 7h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With chloroform; phosphorus pentachloride methyl ester of/the/ dextrorotatory phenylchloroacetic acid; | ||
With phosphorus pentachloride; toluene methyl ester of/the/ dextrorotatory phenylchloroacetic acid; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With pyridine; trichlorophosphate <d(-)-phenylchloroacetic acid >-methyl ester; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With thionyl chloride levorotatory substance; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
3.10 g | In ethanol at 20℃; for 4h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
89% | at 64℃; for 12h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 4 steps 1: 1.) NaH / 1.) THF, 2.) DMSO 2: 85 percent / LiAlH4 / diethyl ether 3: 74 percent / pyridine 4: 70 percent / KOH / various solvent(s) / 100 - 200 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: 1.) NaH / 1.) THF, 2.) DMSO 2: 85 percent / LiAlH4 / diethyl ether |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 3 steps 1: 1.) NaH / 1.) THF, 2.) DMSO 2: 85 percent / LiAlH4 / diethyl ether 3: 74 percent / pyridine |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: aq. sodium acetate / ethanol / 40 h / 130 °C 2: 10 percent aq. NaOH |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: aq. sodium acetate / ethanol / 40 h / 130 °C 2: 10 percent aq. NaOH |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 3 steps 1: aq. sodium acetate / ethanol / 40 h / 130 °C 2: 10 percent aq. NaOH 3: NaNO2, 25 percent aq. HCl |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 4 steps 1: aq. sodium acetate / ethanol / 40 h / 130 °C 2: 10 percent aq. NaOH 3: NaNO2, 25 percent aq. HCl 4: 63 percent / acetic anhydride / 3 h |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 3 steps 1: aq. sodium acetate / ethanol / 40 h / 130 °C 2: 10 percent aq. NaOH 3: NaNO2, 25 percent aq. HCl / 3 h |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 4 steps 1: aq. sodium acetate / ethanol / 40 h / 130 °C 2: 10 percent aq. NaOH 3: NaNO2, 25 percent aq. HCl / 3 h 4: 60 percent / acetic anhydride / 3 h |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: 5.3 g / dry HCl / 18 h / Heating 2: 4.9 g / thionyl chloride / 0.5 h / Heating |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: 59 percent / KOH / ethanol; H2O / 30 °C 2: 7 percent / 7 h / Ambient temperature; Irradiation |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: 59 percent / KOH / ethanol; H2O / 30 °C 2: 16 percent / 7 h / Ambient temperature; Irradiation |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: Sodium acetate / ethanol / 25 h / 130 °C 2: 10percent aq. NaOH |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: Sodium acetate / ethanol / 25 h / 130 °C 2: 10percent aq. NaOH |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: Sodium acetate / ethanol / 25 h / 130 °C 2: 10percent aq. NaOH |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 3 steps 1: Sodium acetate / ethanol / 25 h / 130 °C 2: 10percent aq. NaOH 3: Sodium nitrite, 25percent hydrochloric acid / 3 h / 0 - 5 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 4 steps 1: Sodium acetate / ethanol / 25 h / 130 °C 2: 10percent aq. NaOH 3: Sodium nitrite, 25percent hydrochloric acid / 3 h / 0 - 5 °C 4: 60 percent / 3 h / 100 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 3 steps 1: Sodium acetate / ethanol / 25 h / 130 °C 2: 10percent aq. NaOH 3: Sodium nitrite, 25percent hydrochloric acid / 3 h / 0 - 5 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 3 steps 1: Sodium acetate / ethanol / 25 h / 130 °C 2: 10percent aq. NaOH 3: Sodium nitrite, 25percent hydrochloric acid / 3 h / 0 - 5 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 4 steps 1: Sodium acetate / ethanol / 25 h / 130 °C 2: 10percent aq. NaOH 3: Sodium nitrite, 25percent hydrochloric acid / 3 h / 0 - 5 °C 4: 63 percent / 3 h / 100 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 4 steps 1: Sodium acetate / ethanol / 25 h / 130 °C 2: 10percent aq. NaOH 3: Sodium nitrite, 25percent hydrochloric acid / 3 h / 0 - 5 °C 4: 70 percent / 3 h / 100 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: benzene 2: hydrochloric acid , aqueous |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: benzene 2: hydrochloric acid , aqueous |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: benzene 2: aqueous hydrochloric acid |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: sodium methylate; methanol 2: methanol. KOH-solution |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 7 steps
1: ethanol
2: LiAlH4
3: H2O2 / |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: NaOMe / methanol 2: LiAlH4 | ||
Multi-step reaction with 2 steps 1: ethanol 2: LiAlH4 |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 3 steps 1: NaOMe / methanol 2: LiAlH4 3: (oxidation) | ||
Multi-step reaction with 3 steps
1: ethanol
2: LiAlH4
3: H2O2 / |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 4 steps 1: NaOMe / methanol 2: LiAlH4 3: (oxidation) 4: SOCl2 | ||
Multi-step reaction with 4 steps
1: ethanol
2: LiAlH4
3: H2O2 / |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 4 steps 1: NaOMe / methanol 2: LiAlH4 3: (oxidation) 4: PBr3 |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 4 steps 1: NaOMe / methanol 2: LiAlH4 3: (oxidation) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 5 steps
1: ethanol
2: LiAlH4
3: H2O2 / |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 4 steps 1: NaOMe / methanol 2: LiAlH4 3: (oxidation) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 6 steps
1: ethanol
2: LiAlH4
3: H2O2 / |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 7 steps
1: ethanol
2: LiAlH4
3: H2O2 / |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: PhOH / dioxane 2: LiAlH4 / diethyl ether |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 3 steps 1: PhOH / dioxane 2: LiAlH4 / diethyl ether 3: Py |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: PCl5 |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: Py / methanol 2: aq. Na2CO3 / ethanol; CHCl3 |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: methanol / Heating 2: LiAlH4 / diethyl ether |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydroxide In dichloromethane for 2h; Heating / reflux; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
86% | 5 Methyl alpha (2-oxo 2,4,5,6,7,7a-hexahydro thieno [3,2-c] 5-pyridyl) phenyl-acetate EXAMPLE 5 Methyl alpha (2-oxo 2,4,5,6,7,7a-hexahydro thieno [3,2-c] 5-pyridyl) phenyl-acetate (in formula I: Y=--OCH3; X=H) (Derivative no. 2) This compound is prepared by the operational method described in Example 4 by alkylation of 5,6,7,7a-tetrahydro 4H-thieno [3,2-c] 2-pyridone (II) with methyl alphachlorophenylacetate (in formula IIIb: R=--CH3; X=H; hal=Cl). The product in hydrobromide form is white crystals, M.P.=205° C. (dec.), yield 86%; IR (KBr): vc =o (ester): 1745 cm-1; vc =o (thiolactone): 1695 cm-1; NMR 1 H in ppm (DMSO-d6): 7.60 (m,5H); 6.57 (s,1H); 5.83 (s,1H); 3.77 (s,3H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium iodide In acetone | 15.a (a) (a) Methyl α-iodophenylacetate Sodium iodide (7.5 g, 0.05 mol) dissolved in analar acetone (25 ml) was stirred at room temperature and to it added methyl α-chlorophenylacetate (9.32 g, 0.05 mol). Stirred for 15 minutes. The precipitate sodium chloride was allowed to settle. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydroxide In dichloromethane; water | 1.b b) b) Synthesis of methyl phenyl-p-tolylsulfanylacetate 2 For the synthesis of methyl phenyl-p-tolylsulfanylacetate, 2.0 g (7.9 mmol) of 1 are dissolved in 10 ml of dichloromethane, 1 equiv. of each of 4-methylthiophenol (7.9 mmol, 0.98 g) and sodium hydroxide (7.9 mmol, 0.32 g) are added, and the mixture is refluxed for 2 hours. The reaction mixture is cooled to room temperature and filtered, and the solvent is distilled off. Water is added to the residue, and the reaction product is extracted with ethyl acetate. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Stage #1: methyl 2-chloro-2-phenylethanoate With lithium hexamethyldisilazane In tetrahydrofuran at -78℃; Inert atmosphere; Stage #2: C9H12Cl2MgO2 In tetrahydrofuran at -78 - 0℃; Inert atmosphere; Stage #3: With water; ammonium chloride In tetrahydrofuran |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
93% | In dichloromethane at 23℃; for 1.08333h; Inert atmosphere; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 3 steps 1: bromocyane / dichloromethane / 12 h / 20 °C / Inert atmosphere 2: water; toluene / 6 h / 0 - 20 °C 3: dichloromethane / 12 h / Inert atmosphere; Reflux |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
1: 51% 2: 41 %Spectr. | In dichloromethane for 12h; Inert atmosphere; Reflux; | 3.2. Representative procedure for the amine de-alkylation of 1d with ethyl chloroformate General procedure: A solution of 1d (133 mg, 0.607 mmol) in dichloromethane (3.0 mL) was treated with ethyl chloroformate (95%, 73 μL, 0.73 mmol) and refluxed for 12 h under an argon atmosphere. The resulting mixture was cooled at room temperature, and the volatiles were removed by evaporation. Purification of the residue by chromatography on silica gel (hexane/ethyl acetate=5/1 to 3/1 as the eluent) gave 2d (185 mg, 93% yield) as a colorless oil. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
1: 40% 2: 28% | With [2,2]bipyridinyl; copper(l) iodide In acetonitrile at 20℃; for 12h; Inert atmosphere; Sealed tube; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
1: 80% 2: 10% | With [2,2]bipyridinyl; copper(l) iodide In acetonitrile at 20℃; for 12h; Inert atmosphere; Sealed tube; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
1: 39% 2: 29% | With [2,2]bipyridinyl; copper(l) iodide In acetonitrile at 20℃; for 12.5h; Inert atmosphere; Sealed tube; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
1: 57% 2: 20% | With [2,2]bipyridinyl; copper(l) iodide In acetonitrile at 20℃; for 12.5h; Inert atmosphere; Sealed tube; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With 2,6-dimethylpyridine; (Dichloroiodo)benzene In dichloromethane at 20℃; for 1h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
1: 43 %Spectr. 2: 57 %Spectr. | In dichloromethane at 20℃; for 3h; Inert atmosphere; | 4.6.5. Reaction of methyl mandelate with 2a. Procedure A: 1.13 g (6.8 mmol) methyl mandelate, 1 g (7.5 mmol) 2a, 3 h. As shown by 1H NMR, a 1.35/1 mixture of iminium salt 31 and chloride 30 was obtained after 3 h of reaction at room temperature. When reaction was continued for 12 h, the iminium salt slowly gives the ringopening product 32. The same result was obtained if the reaction was refluxed for 2 h. |
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