An easy, highly efficient, and simple one-pot approach for the
synthesis of dihyroindeno[1,2-b]pyrroles
and indeno[2′,1′:4,5]pyrrolo[1,2-a]-fused 1,3-diazaheterocycles
under mild conditions is reported. The reaction of a primary amine
or 1,n-diamine with 1,1-bis(methylthio)-2-nitroethene in the presence
of ninhydrin in aqueous media afforded the title compounds in good yields.
1,1-bis(methylthio)-2-nitroethene - ninhydrin - indeno[1,2-b]pyrrole - multicomponent
reaction