Catalytic Asymmetric Ring Opening of 2,3-Substituted Norbornenes with Organometallic Reagents: A New Formal Aza Functionalization of Cyclopentadiene
作者:Mauro Pineschi、Federica Del Moro、Paolo Crotti、Franco Macchia
DOI:10.1021/ol050895q
日期:2005.8.1
unprecedented regioselective and anti stereoselective asymmetric ring opening of 1,3-cyclopentadiene-heterodienophile cycloadducts, including also 2,3-diazabicyclo[2.2.1]heptenes, with hard alkylmetals and copper-phosphoramidite catalysts, is reported. The induced ring opening, in conjunction with C-C bond formation, gives a catalytic and practical access to new heterofunctionalized cyclopentenes in
据报道,具有硬质烷基金属和铜-亚磷酰胺催化剂的1,3-环戊二烯-异二烯亲环化合物,包括2,3-二氮杂双环[2.2.1]庚烯,还具有前所未有的区域选择性和反立体选择性不对称开环。诱导的开环,再加上CC键的形成,可以催化和实用地获得对映体富集形式(最高ee为86%)的新型杂功能化环戊烯。[反应:看文字]