3‐b]indolines containing a cyclopropane ring have been prepared in moderate yields with high diastereoselectivity from N‐aryl isatin nitrones and methylenecyclopropanes using a copper‐catalyzed [3+2] cycloaddition and subsequent interrupted Fischer indolization strategy under mild reaction conditions. The obtained furo[2,3‐b]indolines were easily converted to piperidinone‐fused furo[2,3‐b]indolines by
使用
铜催化的[3 + 2]环加成反应,并随后在以下条件下中断的Fischer
吲哚化策略下,已从N-芳基
异丁烯腈和
亚甲基环丙烷以中等收率和高非对映选择性制备了各种含
环丙烷环的多环
呋喃[2,3-b]二氢
吲哚。反应条件温和。通过N-O键裂解选择性[1,3]重排,可将获得的
呋喃[2,3-b]二氢
吲哚轻松转化为
哌啶酮-融合的
呋喃[2,3-b]二氢
吲哚。最后,通过手性辅助控制获得了两个手性多环
呋喃[2,3-b]二氢
吲哚。