Selective reactivity of electron-rich aryl iodides in the Heck arylation of disubstituted alkenes catalyzed by palladium–arylurea complexes
摘要:
A catalyst consisting of 1 mol % of the 1:2 complex of Pd(OAc)(2) with N-(4-carbethoxyphenyl)urea promotes the Heck arylation of 2- or 3-substituted, conjugated esters, nitriles, aldehydes, and ketones (an uncharacteristically broad range of substrates), but only with electron-rich aryl iodides (an uncharacteristically narrow range of halides). (C) 2013 Elsevier Ltd. All rights reserved.
Pd–arylurea complexes for the Heck arylation of crotonic and cinnamic substrates
作者:Matthew R. Smith、Jung Yun Kim、Marco A. Ciufolini
DOI:10.1016/j.tetlet.2013.01.077
日期:2013.4
A catalyst consisting of the 1:2 complex of Pd(OAc)(2) (1 mol %) with N-(4-carbethoxy)-phenylurea promotes the Heck arylation of a range of crotonic and cinnamic substrates, including aldehydes, ketones, esters, and nitriles, with electron-rich-but not electron-deficient-aryl iodides. (c) 2013 Elsevier Ltd. All rights reserved.