(4S,5R)-2-(6,11-dihydrobenzo[c][1,6]benzodioxocin-4-yl)-5-methyl-4,5-dihydro-1,3-oxazole-4-carboxylic acid 、
(4S,5R)-N-[3-[3-(6,11-dihydrobenzo[c][1,6]benzodioxocine-4-carbonylamino)propylamino]propyl]-2-(6,11-dihydrobenzo[c][1,6]benzodioxocin-4-yl)-5-methyl-4,5-dihydro-1,3-oxazole-4-carboxamide 在
N-羟基-7-氮杂苯并三氮唑 、
盐酸-N-乙基-Nˊ-(3-二甲氨基丙基)碳二亚胺 、
三乙胺 作用下,
以
四氢呋喃 、
N,N-二甲基甲酰胺 为溶剂,
反应 12.0h,
以82%的产率得到(4S,5R)-N-[3-[3-(6,11-dihydrobenzo[c][1,6]benzodioxocine-4-carbonylamino)propyl-[(4S,5R)-2-(6,11-dihydrobenzo[c][1,6]benzodioxocin-4-yl)-5-methyl-4,5-dihydro-1,3-oxazole-4-carbonyl]amino]propyl]-2-(6,11-dihydrobenzo[c][1,6]benzodioxocin-4-yl)-5-methyl-4,5-dihydro-1,3-oxazole-4-carboxamide