Ethyl chloroformate → Tert-butyl 3-(hydroxymethyl)morpholine-4-carboxylate

Participants

Reaction Steps

Ethyl chlorocarbonate (149 μL; TCI) was added to a THF (8 mL) solution of morpholine-3, 4-dicarboxylic acid 4-tert-butyl ester (300 mg; Ast) and diisopropylethylamine (560 μL; WAKO) with ice cooling and the resulting mixture was stirred at room temperature for 1 and half hours. Sodium tetrahydroborate (197 mg; WAKO) was added at room temperature, the resulting mixture was stirred for 15 minutes followed by the addition of methanol (1.2 mL) with ice cooling, and the resulting mixture was stirred at room temperature for 2 hours. The reaction mixture solution was concentrated under reduced pressure, ethyl acetate and saturated aqueous sodium bicarbonate solution were added to extract the reaction mixture, then the organic layer was dried, and the solvent was evaporated under reduced pressure to give the title compound (209 mg).

Provenance & Evidence