(3R,8R,8aS)-8-ethyl-5-oxo-3-phenyl-2,3,6,7,8,8a-hexahydro-5H-oxazolo[3,2-a]pyridine 在
臭氧 、
lithium hexamethyldisilazane 、
lithium diisopropyl amide 作用下,
以
四氢呋喃 、
二氯甲烷 为溶剂,
反应 26.5h,
生成
(3R,6R,7S,8R,8aS)-6-(benzyloxycarbonyl)-8-ethyl-7-[2-(2-indolyl)-2-oxoethyl]-5-oxo-3-phenyl-2,3,6,7,8,8a-hexahydro-5H-oxazolo[3,2-a]pyridine 、 (3R,6R,7R,8R,8aS)-6-(benzyloxycarbonyl)-8-ethyl-7-[2-(2-indolyl)-2-oxoethyl]-5-oxo-3-phenyl-2,3,6,7,8,8a-hexahydro-5H-oxazolo[3,2-a]pyridine 、 (3R,6S,7R,8R,8aS)-6-(benzyloxycarbonyl)-8-ethyl-7-[2-(2-indolyl)-2-oxoethyl]-5-oxo-3-phenyl-2,3,6,7,8,8a-hexahydro-5H-oxazolo[3,2-a]pyridine