(E)-3-(1-(thiophen-2-yl)ethylidene)indolin-2-one 在
4-二甲氨基吡啶 、
N-[3,5-双(三氟甲基)苯基]-N'-[(8a,9S)-6'-甲氧基-9-金鸡宁]硫脲 作用下,
以
乙醚 、
二氯甲烷 为溶剂,
反应 10.0h,
生成 tert-butyl (2'S,3S,3a'S,3b'R,8b'S,9a'S)-3a'-(4-bromophenyl)-2,4'-dioxo-2'-(thiophen-2-yl)-9a'-(trifluoromethyl)-2',3',3a',3b',4',9a'-hexahydrospiro[indoline-3,10'-[2,8b]methanofuro[2,3-b]indeno[2,1-d]furan]-1-carboxylate 、 tert-butyl (2'R,3R,3a'R,3b'S,8b'R,9a'R)-3a'-(4-bromophenyl)-2,4'-dioxo-2'-(thiophen-2-yl)-9a'-(trifluoromethyl)-2',3',3a',3b',4',9a'-hexahydrospiro[indoline-3,10'-[2,8b]methanofuro[2,3-b]indeno[2,1-d]furan]-1-carboxylate