tert-butyl (1R,18R,20R,24S,27S,28S)-24-tert-butyl-28-ethyl-13,13-difluoro-7-methoxy-22,25-dioxo-2,21-dioxa-4,11,23,26-tetrazapentacyclo[24.2.1.03,12.05,10.018,20]nonacosa-3,5(10),6,8,11-pentaene-27-carboxylate 在
三氟乙酸 作用下,
以
二氯甲烷 为溶剂,
反应 3.0h,
以153 mg的产率得到(1R,18R,20R,24S,27S,28S)-24-tert-butyl-28-ethyl-13,13-difluoro-7-methoxy-22,25-dioxo-2,21-dioxa-4,11,23,26-tetrazapentacyclo[24.2.1.03,12.05,10.018,20]nonacosa-3,5(10),6,8,11-pentaene-27-carboxylic acid