methyl 3-methyl-N-[(pent-4-en-1-yloxy)carbonyl]-L-valyl-(4R)-4-({[methyl(2-vinylbenzyl)amino]carbonyl}oxy)-L-prolinate 在
詹氏催化剂 作用下,
以
1,2-二氯乙烷 为溶剂,
反应 2.0h,
以74%的产率得到methyl (1R,12E,20S,23S)-20-tert-butyl-4-methyl-3,18,21-trioxo-2,17-dioxa-4,19,22-triazatricyclo[20.2.1.0(6,11)]pentacosa-6,8,10,12-tetraene-23-carboxylate