作者:Mark S. Baird、Vitali M. Boitsov、Alexander V. Stepakov、Alexander P. Molchanov、Jurgen Kopf、Mohanathas Rajaratnam、Rafael R. Kostikov
DOI:10.1016/j.tet.2007.04.104
日期:2007.8
The synthesis of 2,2-dibromocyclopropane-1,1-dicarboxylic acids is described. Reaction of substituted 1,1-dibromo-2-acyloxymethylcyclopropanes with methyl lithium at low temperature leads to a bromine–lithium exchange and then either formal protonation to give the corresponding monobromocyclopropanes or intramolecular cyclisation to give a substituted 3-oxabicyclo[3.1.0]hexane. Oxidative ring opening
描述了2,2-二溴环丙烷-1,1-二羧酸的合成。取代的1,1-二溴-2-酰氧基甲基环丙烷与甲基锂在低温下反应,导致溴-锂交换,然后进行正式质子化反应生成相应的单溴环丙烷,或分子内环化生成取代的3-氧杂双环[3.1.0]己烷。这些化合物的氧化性开环立体选择性地导致在环上具有四个官能团的1,1,2,2-四取代的环丙烷。