Synthesis of Allenes from Allylic Alcohol Derivatives Bearing a Bromine Atom Using a Palladium(0)/Diethylzinc System
作者:Hiroaki Ohno、Kumiko Miyamura、Tetsuaki Tanaka、Shinya Oishi、Ayako Toda、Yoshiji Takemoto、Nobutaka Fujii、Toshiro Ibuka
DOI:10.1021/jo016320y
日期:2002.2.1
A general and efficient synthesis of allenes using a palladium(0)/diethylzinc system is described. Treatment of mesylates or trichloroacetates of (E)- or (Z)-2-bromoalk-2-en-1-ols with diethylzinc in the presence of a catalytic amount of palladium(0) affords allenes bearing an aminoalkyl, alkyl, or aryl substituent(s) in good to high yields. No transfer of chirality from the stereogenic center carrying
描述了使用钯(0)/二乙基锌系统的通用且有效的丙二烯合成。在催化量的钯(0)存在下用二乙基锌处理(E)-或(Z)-2-溴代烷基-2-烯-1-醇的甲磺酸酯或三氯乙酸酯,得到带有氨基烷基,烷基或芳基的烯丙基良好或高收率的取代基。没有观察到手性从带有甲磺酰氧基的立体异构中心向丙二烯的转移。