Palladium-Catalyzed Reactions of 3-Substituted Methylenecyclopropanes
作者:Li-Xiong Shao、Jia Li、Bao-Yu Wang、Min Shi
DOI:10.1002/ejoc.201001082
日期:2010.11
Pd-catalyzed reactions of 3-substitutedmethylenecyclopropanes (MCPs), in which the substituents can be either hydroxymethyl or formyl, have been thoroughly investigated in the presence or absence of an acid source. It was found that the Pd-catalyzed reactions of methylenecyclopropylcarbinols (Z)-1 in the presence of acetic acid, acetic acid 2-methylene-but-3-enyl esters 4 can be formed in moderate
Palladium(ii)-catalyzed ring enlargement of 2-(arylmethylene)cyclopropylcarbinols: strong effect of substituent electronic nature on the reaction pathway
作者:Guo-Qiang Tian、Zhi-Liang Yuan、Zhi-Bin Zhu、Min Shi
DOI:10.1039/b804932g
日期:——
In the presence of Pd(II) catalyst and copper(II) bromide, 2-(arylmethylene)cyclopropylcarbinols undergo ring enlargement to deliver (arylcyclobutenyl)carbinols or hydrogenated furans in good yields under mild conditions; mechanisms accounting for the distinct products have been proposed on the basis of control and deuterium labeling experiments.