Synthesis of 2-Amino-3-cyano-4H-chromene-4-carboxamide Derivatives by an Isocyanide-Based Domino Conjugate Addition/O-Trapping Rearrangement Sequence
作者:Márió Gyuris、Ramóna Madácsi、László G. Puskás、Gábor K. Tóth、János Wölfling、Iván Kanizsai
DOI:10.1002/ejoc.201001502
日期:2011.2
An efficient, one-pot domino synthesis of new 2-amino-3-cyano-4H-chromene-4-carboxamide derivatives has been developed by the acid-induced conjugate addition of isocyanides to 2-imino-2H-chromene-3-carboxamides, followed by an intramolecular O-trapping rearrangement, with yields up to 92 %. This newly established protocol was also used in multicomponent (3CR) mode.