Influence of strain on chemical reactivity. Relative reactivity of torsionally distorted double bonds in MCPBA epoxidations
作者:Kenneth J. Shea、Jang Seob Kim
DOI:10.1021/ja00034a042
日期:1992.4
The second-order reaction rata were measured for the MCPBA epoxidation in CH 2 Cl 2 for a series of cyclic olefins including bridgehead olefins and trans-cycloalkenes. As expected, strained bridgehead alkenes and trans-cycloalkenes showed faster reaction rates than nonstrained cis-cycloalkenes. The MM-2 steric energies of alkenes, alkanes, and their corresponding epoxides were calculated to evaluate
测量了MCPBA在CH 2 Cl 2 中环氧化一系列环烯烃(包括桥头烯烃和反式环烯烃)的二级反应速率。正如预期的那样,应变桥头烯烃和反式环烯烃比未应变的顺式环烯烃表现出更快的反应速率。计算烯烃、烷烃及其相应环氧化物的 MM-2 空间能以评估每个反应中释放的应变能 (ΔSE)。log k rel 与烯烃菌株的图没有显示出良好的相关性