2-(9H-fluoren-9-ylmethoxycarbonylamino)-succinic acid 4-[2-(4-tert-butoxycarbonyl-4-tert-butoxycarbonylamino-butyrylamino)-2-(tert-butoxycarbonylmethyl-carbamoyl)-ethyl] ester 1-(3a-hydroxy-7a-methyl-1-oxo-octahydro-inden-5-yl) ester 在
1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下,
以
二氯甲烷 为溶剂,
反应 0.5h,
以95%的产率得到(S)-2-Amino-succinic acid 4-[(S)-2-((S)-4-tert-butoxycarbonyl-4-tert-butoxycarbonylamino-butyrylamino)-2-(tert-butoxycarbonylmethyl-carbamoyl)-ethyl] ester 1-((3aR,5S,7aR)-3a-hydroxy-7a-methyl-1-oxo-octahydro-inden-5-yl) ester