cascading cycloisomerization of alkylidene cyclopropane bearing 1,5-enynes that terminates in a cyclo-addition of aldehydes has been developed. This diastereoselective reaction provides convergent access to novel polycyclic molecular structures (18 examples), and tolerates a diverse scope of aldehydes. Mechanistic studies reveal that the catalytic cycle rests at a digold off-cycle intermediate, one of which
已经开发了非对映选择性的,
金催化的带有1,5-烯炔的亚烷基
环丙烷的级联环异构化反应,该反应终止于醛的环加成反应。这种非对映选择性反应提供了对新颖的多环分子结构的收敛途径(18个实例),并能耐受各种范围的醛。机理研究表明,催化循环停留在一个digold循环外中间体上,其中一个是分离的。