Highly stereoselective synthesis of vinyl and ethynylcyclopropane 1,1-dicarboxylic esters via semi-stabilized telluronium ylides
作者:Yong Tang、Zheng-Fa Chi、Yao-Zeng Huang、Li-Xin Dai、Yi-Hua Yu
DOI:10.1016/0040-4020(96)00427-9
日期:1996.6
ethynylcyclo-propane 1,1-dicarboxylic esters conveniently synthesized by the reaction of allylic diisobutyltelluronium ylides with alkylidene or arylmethy-lidene malonic esters with high yields and high stereoselectivity. The effects of the reaction media and bases used to produce the ylides on the stereoselectivity are studied.
高度电子缺陷的乙烯基和乙炔基环丙烷1,1-二羧酸酯,可通过烯丙基二异丁基碲化钌与亚烷基或芳基甲基亚芳基丙二酸酯反应以高收率和高立体选择性方便地合成。研究了反应介质和用于制备酰化物的碱对立体选择性的影响。