(9S,12S,15S)-12-(2-tert-Butoxycarbonyl-ethyl)-9-(9H-fluoren-9-ylmethoxycarbonylamino)-10,13-dioxo-2-oxa-11,14-diaza-tricyclo[15.2.2.13,7]docosa-1(20),3(22),4,6,17(21),18-hexaene-15-carboxylic acid methyl ester 在
4-氨甲基哌啶 作用下,
以
二氯甲烷 为溶剂,
以95%的产率得到(9S,12S,15S)-9-Amino-12-(2-tert-butoxycarbonyl-ethyl)-10,13-dioxo-2-oxa-11,14-diaza-tricyclo[15.2.2.1
3,7]docosa-1(20),3(22),4,6,17(21),18-hexaene-15-carboxylic acid methyl ester