featured by a bulky bridging ligand has been demonstrated to exhibit an exceptionally high order of selectivity for C-H insertion into methylene over methine in catalytic decompositions of α-diazo β-keto esters tethered to a cyclic system, thus providing an expedient and geneal entry to bicyclic compounds in preference to spirocyclic compounds. The efficiency is verified well by high-yield and site-controlled
已经证明,具有庞大桥联
配体的Rh 2(
TPA)4
铑(II)(Rh 2(
TPA)4)在甲氧基重氮β-
酮酸酯的催化分解过程中,对
甲烷插入亚甲基中的CH的选择性高于对亚甲基的选择性高。环状系统的存在,因此优先于
螺环化合物提供
双环化合物的方便且一般的进入。双环[3.3.0]
辛烷衍
生物的高产率和定点控制结构很好地验证了效率,该
双环化合物是(+)-异
卡巴环素的会聚合成的关键中间体。