Gly-NH-uncialamycin 、 4-(2-(2-(4-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)butanamido)-3-methylbutanamido)-5-ureidopentanamido)benzyl(4-nitrophenyl)carbonate 在
N,N-二异丙基乙胺 作用下,
以
二甲基亚砜 为溶剂,
反应 1.0h,
以50%的产率得到[4-[[(2S)-5-(carbamoylamino)-2-[[(2S)-2-[4-(2,5-dioxopyrrol-1-yl)butanoylamino]-3-methylbutanoyl]amino]pentanoyl]amino]phenyl]methyl N-[2-[[(1S,17S,20Z,24R,26R)-4,24-dihydroxy-26-[(1R)-1-hydroxyethyl]-6,13-dioxo-25-oxa-16-azahexacyclo[15.7.2.01,26.02,15.05,14.07,12]hexacosa-2,4,7(12),8,10,14,20-heptaen-18,22-diyn-9-yl]amino]-2-oxoethyl]carbamate