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CAS No. : | 214759-66-7 | MDL No. : | MFCD12756074 |
Formula : | C9H6ClNO2 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | KDNFJYKKFLHZKZ-UHFFFAOYSA-N |
M.W : | 195.60 | Pubchem ID : | 19076698 |
Synonyms : |
|
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P280-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302-H315-H319-H332-H335 | Packing Group: | N/A |
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 |
---|---|---|
68% | Stage #1: With tert.-butylnitrite; boron trifluoride diethyl etherate In diethyl ether; dichloromethane at -20 - 20℃; for 72.5 h; Stage #2: at 0 - 20℃; for 18.5 h; Stage #3: With iron(III) chloride In water at 20℃; for 0.5 h; |
A solution of methyl 4-amino-3-chlorobenzoate (5.0 g, 27 mmol) was stirred at -20°C in DCM (20 mL) and treated sequentially with a solution of BF3.0Et.2 (5.5 mL, 43 mmol) in anhydrous diethyl ether (10 mL) and ferf-butyl nitrite (6.0 mL, 46 mmol). The reaction mixture was stirred at -20°C for 30 min and then allowed to warm slowly to RT and stirred for 72 h. The reaction mixture was filtered and the precipitate was washed sequentially with DCM (50 mL), Et.20 (50 mL) and isohexane (50 mL) to afford the intermediate diazonium salt. The salt was dissolved in H2O (200 mL) and slowly added to a stirred mixture of potassium cyanide (1.98 g, 30.4 mmol) and copper (I) cyanide (2.73 g, (0572) 30.4 mmol) in H20 (300 mL) at 0-5°C. After the addition the mixture was stirred at 0-5°C for 0.5 h, then at RT for 18 h. The mixture was treated with 10percent aqueous FeC solution (200 mL) and stirred at RT for 30 min. The product was extracted with EtOAc (3 x 200 mL) and the combined organic extracts were washed with brine (400 mL), dried over MgSC , filtered and concentrated in vacuo. The product was purified by silica gel chromatography (120 g, 0-10percent EtOAc in isohexane) to afford the title compound (2) (3.56 g, 68percent) as an orange solid: m/z 196 [M+H]+ (ES+); 1 H NMR (400 MHz, DMSO-d6) δ: 8.17 - 8.14 (2H, m), 8.04 (1 H, dd), 3.91 (3H, s) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
43.7% | With tetrakis(triphenylphosphine) palladium(0) In N,N-dimethyl-formamide at 100℃; | (Step 3) (0896) A mixture of methyl 4-bromo-3-chlorobenzoate (5.84 g, 23.41 mmol), tetrakis(triphenylphosphine)palladium (1.352 g, 1.17 mmol), copper(I) cyanide (1.484 mL, 23.41 mmol) and DMF (50 mL) was stirred at 100°C overnight. The reaction mixture was allowed to be cooled to room temperature, saturated brine was added thereto, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, and dried over magnesium sulfate, and the solvent was evaporated under reduced pressure. The obtained residue was purified by silica gel column chromatography (solvent gradient; 5→50percent ethyl acetate/hexane) to give methyl 3-chloro-4-cyanobenzoate (2.0 g, 10.22 mmol, 43.7percent) as a colorless solid. 1H-NMR(300MHz,CDCl3):δ4.01(3H,s),7.92(1H,d,J=8.7Hz),8.38(1H,dd,J=8 .1,1.7Hz),8.46(1H,d,J=1.5Hz). |
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