2-(3-(1-[5-(3-amino-propylcarbamoyl)-pentyl]-3,3-dimethyl-1,3-dihydro-indol-2-ylidene)-propenyl)-1,3,3-trimethyl-3H-indolium 、
(S)-2-(6-acryloylamino-hexanoylamino)-5-(4-methoxycarbonylmethoxy-7-nitro-2,3-dihydro-indol-1-yl)-5-oxo-pentanoic acid 在
N-羟基-7-氮杂苯并三氮唑 、 Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-) 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 28.0h,
以58%的产率得到(S)-2-(3-[1-(5-(3-[2-(6-acryloylaminohexanoylamino)-5-(4-(methoxycarbonylmethoxy)-7-nitro-2,3-dihydro-indol-1-yl)-5-oxo-pentanoylamino]-propylcarbamoyl)-pentyl)-3,3-dimethyl-1,3-dihydro-indol-2-ylidene]-propenyl)-1,3,3-trimethyl-3H-indolium