反应详情

To (RS)-4-benzyl-5-oxo-morpholine-3-carboxylic acid (2.0 g, 8.51 mmol) in MDC (40 ml) was slowly added oxalyl chloride (1.51 ml, 17.1 mmol). The mixture was stirred for 0.5 h at room temperature and then evaporated to give (RS)-4-benzyl-5-oxomorpholine-3-carbonyl chloride as a brown solid (1.99 g, 92%). Ammonia gas was bubbled steadily through a solution of (RS)-4-benzyl-5-oxomorpholine-3-carbonyl chloride (1.99 g, 7.79 mmol) in MDC (40 ml) at 0° C. for 0.5 h, and then the mixture allowed to warm to room temperature. The solid was collected by filtration, washed with MDC (30 ml) and dried in vacuo at 40° C. to give the title compound as a white solid (2.1 g, 99%). Mass spectrum (API+): Found 235 (MH30 ). C12H14N2O3 requires 234.

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