Triethylamine → (S)-9-Chloro-2,3,11,11a-tetrahydro-1H,5H-pyrrolo[2,1-c][1,4]benzoxazepine-5-one

Participants

Reaction Conditions

Reaction Steps

To a solution of 3-chloro-2-fluorobenzoyl chloride (2.2 g; 11.4 mmol) in dimethylformamide (5 ml) was added triethylamine (1.7 mL; 11.7 mmol) and (S)-(+)-2-pyrrolidinemethanol (1.13 mL; 11.4 mmol). The mixture was stirred for 1 h then caesium carbonate (7.4 g; 22.7 mmol) was added and the reaction heated at 120° C. for 5 hours. The reaction was cooled to room temperature then diluted with water and extracted with ethyl acetate The organics were washed with water and dried (Na2SO4) evaporated in vacuo. The crude product was purified by chromatography on silica (eluting with 5% methanol in dichloromethane). On removal of solvent the pure amide crystallised and heptane/ether was added and the title compound collected (0.26 g). M.p., 89-90° C.; EIMS: m/z=238 [M+H]+

Provenance & Evidence