8-[(8-{[(1R,6R)-8-(tert-butoxycarbonylamino)bicyclo[4.3.0]non-3-en-8-yl]carbonylamino}-(1R,6R)-bicyclo[4.3.0]non-3-en-8-yl)carbonylamino]-(1R,6R)-bicyclo[4.3.0]non-3-ene-8-carboxylic acid 、 在
O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 48.0h,
以32%的产率得到ethyl (3aR,7aR)-2-[({(3aR,7aR)-2-[({(3aR,7aR)-2-[({(3aR,7aR)-2-[({(3aR,7aR)-2-[({(3aR,7aR)-2-[({(3aR,7aR)-2-[({(3aR,7aR)-2-[({(3aR,7aR)-2-[(tert-butoxycarbonyl)amino]-2,3,3a,4,7,7a-hexahydro-1H-inden-2-yl}carbonyl)amino]-2,3,3a,4,7,7a-hexahydro-1H-inden-2-yl}carbonyl)amino]-2,3,3a,4,7,7a-hexahydro-1H-inden-2-yl}carbonyl)amino]-2,3,3a,4,7,7a-hexahydro-1H-inden-2-yl}carbonyl)amino]-2,3,3a,4,7,7a-hexahydro-1H-inden-2-yl}carbonyl)amino]-2,3,3a,4,7,7a-hexahydro-1H-inden-2-yl}carbonyl)amino]-2,3,3a,4,7,7a-hexahydro-1H-inden-2-yl}carbonyl)amino]-2,3,3a,4,7,7a-hexahydro-1H-inden-2-yl}carbonyl)amino]-2,3,3a,4,7,7a-hexahydro-1H-indene-2-carboxylate