A new allylation reaction of carbonyl compounds using allenes
is described; homoallylic alcohols were obtained in moderate to good yields
from aryl iodides, allenes and carbonyl compounds and an excellent
diastereoselection was exhibited when 2-hydroxycyclohexanone was
employed.
Three-component bimetallic (Pd/In) mediated cascade allylation of C=X functionality
作者:Laura A.T Cleghorn、Ian R Cooper、Colin W.G Fishwick、Ronald Grigg、William S MacLachlan、Marcello Rasparini、Visuvanathar Sridharan
DOI:10.1016/j.jorganchem.2003.09.047
日期:2003.12
A new general three-component Pd/In bimetallic cascade reaction with four synthetic variants involving aryliodides, allenes and C=X compounds affording homoallylic alcohols/amines as products is described and exemplified for Class 1 processes (intermolecular Pd–intermolecular In steps). Remarkable increases in yield and reaction rates were observed in the presence of amine additives. Excellent diastereoselection
Additive effects in palladium–indium mediated Barbier type allylations
作者:Laura A.T Cleghorn、Ian R Cooper、Ronald Grigg、William S MacLachlan、Visuvanathar Sridharan
DOI:10.1016/j.tetlet.2003.08.103
日期:2003.10
The effect of adding 1 equiv. of an amine or 0,2 equiv. of CuI to a Pd/In bimetallic cascade reaction is described. In the class 1 cascade reaction of aldehydes, aryl iodides and allene, generating homoallylic alcohols, the reaction time is reduced from 16 to 2 h and is accompanied by an impressive increase in yield. (C) 2003 Published by Elsevier Ltd.