Three-component synthesis of substituted β-(trifluoromethyl)pyrroles via Grob cyclization of 1,1,1-trifluoro-3-nitrobut-2-ene with 1,3-dicarbonylic compounds and ammonia or primary amines

A variety of substituted beta-(trifluoromethyl)pyrroles were easily synthesized in good yields by a one-pot, three-component Grob cyclization of 1,1,1-trifluoro-3-nitrobut-2-ene with 1,3-dicarbonyls (ethyl acetoacetate, acetylacetone, benzoylacetone) and ammonia or primary aliphatic amines. (C) 2012 Elsevier B.V. All rights reserved.