D-苯甘氨醇 、
methyl 4-(tert-butyldimethylsilyloxy)-5-oxopentanoate 以
甲苯 为溶剂,
生成 (3R,8S,8aR)-8-(tert-butylsilyloxy)-5-oxo-3-phenyl-2,3,6,7,8,8a-hexahydro-5H-oxazolo[3,2-a]pyridine 、 (3R,8R,8aR)-8-(tert-butylsilyloxy)-5-oxo-3-phenyl-2,3,6,7,8,8a-hexahydro-5H-oxazolo[3,2-a]pyridine