Influence of strain on chemical reactivity. Relative reactivity of torsionally strained double bonds in 1,3-dipolar cycloadditions
作者:Kenneth J. Shea、Jang Seob Kim
DOI:10.1021/ja00038a059
日期:1992.6
alkenes showed reversed regiochemistry of cycloaddition when compared with model alkenes. It is proposed that the reversal of regiochemistry is caused by the out of plane bending of the bridgehead double bond
据报道,将苦基叠氮化物加成到一系列单环和双环烯烃,包括反式环烯烃和桥头烯烃。确定了次级反应产物,并通过将过渡态能量与反应中间体的构象相关联的分析来解释它们的形成机制。与模型烯烃相比,桥头烯烃显示出环加成的反向区域化学。提出区域化学的逆转是由桥头双键的平面外弯曲引起的