Visible light-promoted synthesis of 4,6<i>a</i>-dihydropyrrolo[3,4-<i>c</i>]pyrrole-1,3(2<i>H</i>,3<i>aH</i>)-diones <i>via</i> [3+2] cycloaddition reaction of 2<i>H</i>-azirines with maleimides
作者:Hao Guo、Huahao Wang、Hongyi Zhao、Dongfeng Zhang
DOI:10.1039/d2nj06257g
日期:——
Diastereoselective synthesis of pyrrolo[3,4-c]pyrrole-1,3-dione derivitives from 2H-azirines and N-substituted maleimides through an efficient and environmentally friendly visible light-induced cycloaddition reaction.
dipolarophiles proceeded smoothly to give pyrrole or pyrroline derivatives in good to excellent yields. For example, α-silylimidate 1 was treated with 1.2 equiv of trifluorophenylsilane in the presence of 1 equiv of dimethyl acetylenedicarboxylate to give pyrrole 2 in 97% yield. Furthermore, when starting with a secondary α-silylamide, the one-pot synthesis of N-unsubstituted azomethine ylides could