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。