Synthesis of 2-aryl-4-chloropyrroles via ring expansion of 2-aryl-1-chlorocyclopropanecarbaldehydes
摘要:
An efficient electrophile-induced ring opening of 2-aryl-1-chlorocyclopropanecarbaldehydes is described towards halogenated butanals, which were converted to the corresponding imines. These alpha,alpha,gamma-trichloroimines proved to be good substrates for a nucleophile-induced ring closure towards 2-pyrrolines as versatile synthons for the synthesis of pyrroles bearing physiologically interesting substitution patterns. (c) 2005 Elsevier Ltd. All rights reserved.
Synthesis of chlorinated 2-(aminomethyl)- and 2-(alkoxymethyl)pyrroles
作者:Guido Verniest、Sven Claessens、Norbert De Kimpe
DOI:10.1016/j.tet.2005.02.086
日期:2005.5
The synthesis of chlorinated 2-(hydroxymethyl)-, 2-(alkoxymethyl)- and 2-(aminomethyl)pyrroles via aromatization of 2-aryl-3,3-dichloro-5-(bromomethyl)pyrrolines and via reduction of 2-formyl- and 2-cyanopyrroles is described. The former methodology also provided new 2-[(alkyl- or phenylamino)methyl]pyrroles and a 2-(phosphonomethyl)pyrrole. Halogenated and methylene-spaced functionalized pyrroles are
Synthesis of 2-aryl-4-chloropyrroles via ring expansion of 2-aryl-1-chlorocyclopropanecarbaldehydes
作者:Guido Verniest、Sven Claessens、Filip Bombeke、Tinneke Van Thienen、Norbert De Kimpe
DOI:10.1016/j.tet.2005.01.087
日期:2005.3
An efficient electrophile-induced ring opening of 2-aryl-1-chlorocyclopropanecarbaldehydes is described towards halogenated butanals, which were converted to the corresponding imines. These alpha,alpha,gamma-trichloroimines proved to be good substrates for a nucleophile-induced ring closure towards 2-pyrrolines as versatile synthons for the synthesis of pyrroles bearing physiologically interesting substitution patterns. (c) 2005 Elsevier Ltd. All rights reserved.