2-[1-Acetylamino-meth-(Z)-ylidene]-3-oxo-N-((S)-1-phenyl-ethyl)-butyramide 、
1,1-二乙氧基丙-1-烯 以
甲苯 为溶剂,
反应 6.0h,
生成 (4R,5R)-4-Acetylamino-6,6-diethoxy-2,5-dimethyl-5,6-dihydro-4H-pyran-3-carboxylic acid ((S)-1-phenyl-ethyl)-amide 、 (4S,5S)-4-Acetylamino-6,6-diethoxy-2,5-dimethyl-5,6-dihydro-4H-pyran-3-carboxylic acid ((S)-1-phenyl-ethyl)-amide 、 (4R,5S)-4-Acetylamino-6,6-diethoxy-2,5-dimethyl-5,6-dihydro-4H-pyran-3-carboxylic acid ((S)-1-phenyl-ethyl)-amide