Michael additions of 1,2-dihydro-3H-indol-3-ones and some reactions of Michael adducts with ammonium acetate

Abstract

Reactions of 1-acetyl-1,2-dihydro-3H-indol-3-one and 1-acetyl-2-methoxy-1,2-dihydro-3H-indol-3-one with ethylenic and acetylenic carbonyl compounds took place with Michael addition to give 1,3-di- and/or 1,2,3-tri-acylpropane compounds, respectively, which were elaborated to provide several kinds of heterocyclic compounds: carbazoles, oxaspiroindoles, a pyrano[3,2-b]indole, pyrroles and pyrrolo[1,2-a]indoles.