草酰氯 、
(R/S)-1-[(2R,6S)-6-(3,4,5-trifluorophenyl)piperidine-2-yl]ethanol 在
吡啶 作用下,
以
氯仿 为溶剂,
反应 1.0h,
生成 (1S,6S,9aR)-1-methyl-6-(3,4,5-trifluorophenyl)hexahydropyrido[2,1-c][1,4]oxazine-3,4-dione 、 (1R,6S,9aR)-1-methyl-6-(3,4,5-trifluorophenyl)hexahydropyrido[2,1-c][1,4]oxazine-3,4-dione