tert-butyl 2-amino-4-[(1R)-1-({[3-(2-acetylhydrazono)-(6S)-6-(5-chloro-2-methoxybenzyl)-7-oxo-1,4-diazepan-1-yl]carbonyl}amino)propyl]benzoic acid 在
silica gel 、 trichloromethane, methanol, ethyl acetate 、
tert-butyl 2-amino-4-[(1R)-1-({[(6S)-6-(5-chloro-2-methoxybenzyl)-3-methyl-7-oxo-6,7-dihydro-5H-[1,2,4]triazolo[4,3-a][1,4]diazepin-8(9H)-yl]carbonyl}amino)propyl]benzoate 作用下,
以
1,4-二氧六环 为溶剂,
反应 0.5h,
以to obtain tert-butyl 2-amino-4-[(1R)-1-({[(6S)-6-(5-chloro-2-methoxybenzyl)-3-methyl-7-oxo-6,7-dihydro-5H-[1,2,4]triazolo[4,3-a][1,4]diazepin-8(9H)-yl]carbonyl}amino)propyl]benzoate (compound 87b) (33.4 mg)的产率得到tert-butyl 2-amino-4-[(1R)-1-({[(6S)-6-(5-chloro-2-methoxybenzyl)-3-methyl-7-oxo-6,7-dihydro-5H-[1,2,4]triazolo[4,3-a][1,4]diazepin-8(9H)-yl]carbonyl}amino)propyl]benzoate