tert-butyl 9-[4-(2,6-dichlorobenzyloxy)benzyl]-7-[(S)-2-phenyl-1-(2,2,2-trichloroethoxycarbonyl)-ethyl]-6,8,10-trioxo-1,7,9-triaza-spiro[4.5]decane-1-carboxylate 在
ammonium acetate 、
锌 作用下,
以
四氢呋喃 为溶剂,
反应 24.0h,
以72%的产率得到tert-butyl 7-((S)-1-carboxy-2-phenylethyl)-9-[4-(2,6-dichlorobenzyloxy)benzyl]-6,8,10-trioxo-1,7,9-triaza-spiro[4.5]decane-1-carboxylate