The metal-free cyclization of allenylketones and p-toluenesulfonylmethyl isocyanide (TosMIC), promoted by Cs2CO3, provides a convenient access to tetrasubstituted pyrroles in which an acyl group undergoes 1,2-migration. This tandem Michael addition/annulative migration synthetic strategy is general and high-yielding for various substituted allenylketones. Moreover, a phosphoryl or ester moiety is
由 Cs 2 CO 3促进的联烯基酮和对甲苯磺酰甲基异氰化物 (TosMIC)的无金属环化提供了获得四取代吡咯的便捷途径,其中酰基经历 1,2-迁移。这种串联迈克尔加成/环状迁移合成策略对各种取代的丙二烯酮具有通用性和高产率。此外,磷酰基或酯部分也是使这种迁移成为可能的合适功能。