A Preparative Route to Methyl 3-(Heteroaryl)acrylates Using Heck Methodology
作者:Thomas J. Kwok、Joseph A. Virgilio
DOI:10.1021/op050106k
日期:2005.9.1
Methyl 3-(heteroaryl)acrylates were prepared using Heck coupling of heteroarene halides with methyl acrylate mediated by Pd(OAc)2/P(OCH3)3. Reactions were highly efficient (reaction times between 60 and 120 min) and scalable to 100 g of heteroarene halide. The isolated yields are from 76 to 99%.
Two new unsymmetricalsquaraines (WCH-SQ10 and WCH-SQ11), wherein the electron-rich 3,4-ethylenedioxy-thiophene conjugated fragment was linked unconventionally to the squaraine core and triphenyl amine donor, and carboxylic acid substituted quinoline was used as an acceptor, were prepared. WCH-SQ10 and WCH-SQ11 dyes in ethanol have the λmax of 686 and 673 nm, respectively. The corresponding photovoltaic