(2S)-6-{[(benzyloxy)carbonyl]amino}-2-[(4R)-3-oxo-4-[(phenylacetyl)amino]-3,4,5,10-tetrahydroazepino[3,4-b]indol-2(1H)-yl]hexanoic acid 、
R(+)-alpha-甲基苄胺 在
O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate 、
三乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 1.17h,
以80%的产率得到benzyl (5S)-6-oxo-5-[(4R)-3-oxo-4-[(phenylacetyl)amino]-3,4,5,10-tetrahydroazepino[3,4-b]indol-2(1H)-yl]-6-{[(1R)-1-phenylethyl]amino}hexylcarbamate