Reactions of σh-adducts of 1-ethyl-1,4-diazinium salts with arylalkynes as a one-step approach to pyrrolo[1,2-a]pyrazine derivatives

Article abstract of DOI:10.1007/s11172-009-0169-1

The O-and C-adducts of 5-aryl and 5-hetaryl-2,3-dicyano-1-ethylpyrazinium salts are hidden sources of ylides, which can be used for the cyclization with arylacetylenes giving rise to pyrrolo[1,2-a ]pyrazines. ; 2009 Springer Science+Business Media, Inc.