phenylmethyl (-)-1'-acetyltetrahydro-8a-(methoxymethyl)-5-oxospiro[5H-oxazolo[3,2-a]pyrazine-2(3H),4'-piperidine]-7-carboxylate 在
palladium 10% on activated carbon
氢气 作用下,
以
甲醇 为溶剂,
生成 (-)-1'-acetyltetrahydro-8a-(methoxymethyl)spiro[5H-oxazolo[3,2-a]pyrazine-2(3H),4'-piperidin]-5-one