Ethyl chloroformate → 1-Ethyl 4-methyl 4-(4-but-2-ynyloxybenzenesulfonyl)-1,4-piperidinedicarboxylate

Participants

Reaction Steps

To a solution of 4-(4-but-2-ynyloxy-benzenesulfonyl)-piperidine-4-carboxylic acid methyl ester (400 mg, 1.03 mmol) in chloroform (10 ml) was added sodium bicarbonate (865 mg, 10.3 mmol), ethylchloroformate (0.147 ml, 1.54 mmol). The resulting mixture was stirred for 15 hours at room temperature, quenched with water and extracted with methylene chloride. The organic layer was dried over anhydrous sodium sulfate and concentrated to give 425 mg (98%) of the product as a solid. MS-ES: m/z 424.4 (M+H)+.

Provenance & Evidence