Cyclopropenation of internal alkynylsilanes and diazoacetates catalyzed by copper(<scp>i</scp>) N-heterocyclic carbene complexes
作者:Thomas J. Thomas、Benjamin A. Merritt、Betsegaw E. Lemma、Adina M. McKoy、Tri Nguyen、Andrew K. Swenson、Jeffrey L. Mills、Michael G. Coleman
DOI:10.1039/c5ob02259b
日期:——
Copper(I) N-heterocyclic carbene (CuNHC) complexes are more catalytically active than traditional transition metal salts for the cyclopropenation of internal alkynylsilanes and diazoacetate compounds. A series of 1,2,3-trisubstituted and 1,2,3,3-tetrasubstituted cyclopropenylsilane compounds were isolated in good overall yields. An interesting regioselective and chemodivergent reaction pathway was
对于内部炔基硅烷和重氮乙酸酯化合物的环丙烷化作用,铜(I)N-杂环卡宾(CuNHC)配合物比传统的过渡金属盐更具催化活性。以良好的总收率分离出一系列1,2,3-三取代和1,2,3,3-四取代的环丙烯基硅烷化合物。还观察到一种有趣的区域选择性和化学发散反应途径,可为富电子供体/受体重氮乙酸酯提供四取代呋喃。最后,还描述了对生物正交化学有用的含环丙烯基的起始原料的实际合成。