Butenolide Synthesis from Functionalized Cyclopropenones
作者:Sean S. Nguyen、Andrew J. Ferreira、Zane G. Long、Tyler K. Heiss、Robert S. Dorn、R. David Row、Jennifer A. Prescher
DOI:10.1021/acs.orglett.9b03298
日期:2019.11.1
A general method to synthesize substituted butenolides from hydroxymethylcyclopropenones is reported. Functionalized cyclopropenones undergo ring-opening reactions with catalytic amounts of phosphine, forming reactive ketene ylides. These intermediates can be trapped by pendant hydroxy groups to afford target butenolide scaffolds. The reaction proceeds efficiently in diverse solvents and with low catalyst
Copper(I)-Catalyzed C<sub>aryl</sub>-C<sub>alkynyl</sub> Bond
Formation of Aryl Iodides with Terminal Alkynes
作者:G. Sekar、K. Thakur
DOI:10.1055/s-0029-1216876
日期:——
range of internal alkynes are synthesized from the corresponding aryl iodides and terminalalkynes by Sonogashira-type cross-coupling reactions through Caryl-Calkynyl bond formation in the presence of a catalytic amount of readily available DBU-CuBr complex under mild reaction conditions. copper catalyst - coupling reaction - arylated alkynes- C-C bond formation - Sonogashira coupling - nitrogen ligands
An efficient copper(I) complex catalyzed Sonogashira type cross-coupling of aryl halides with terminal alkynes
作者:K.G. Thakur、E.A. Jaseer、Ajay B. Naidu、Govindasamy Sekar
DOI:10.1016/j.tetlet.2009.03.146
日期:2009.6
A wide range of arylated alkynes are synthesized from the corresponding aryl halides and terminal alkynes through Sonogashira type cross-coupling reactions through C(aryl)-C bond formation in the presence of a catalytic amount of N,N'-dibenzyl BINAM-Cul complex under mild reaction conditions. (C) 2009 Elsevier Ltd. All rights reserved.