Unexpected Stereodynamic Consequences of the Restricted Rotations in <i>ortho</i>-Acyl- and <i>ortho</i>-Vinyl Biphenyls
作者:Lodovico Lunazzi、Andrea Mazzanti、Mirko Minzoni
DOI:10.1021/jo0613131
日期:2006.12.1
Surprisingly, the aryl−aryl rotation barriers of biphenylderivatives ortho-substituted by the “small” HCO and HCCH2 groups (10.0 and 8.4 kcal mol-1, respectively) were found greater than those observed in biphenyls ortho-substituted by the “large” t-BuCO and t-BuCCH2 groups (6.7 and 6.9 kcal mol-1, respectively).
出乎意料的是,发现被“小的” HC O和HC CH 2基团(分别为10.0和8.4 kcal mol -1)邻位取代的联苯衍生物的芳基-芳基旋转势垒比被OH邻位取代的联苯中观察到的更大。 “大” t -BuC O和t -BuC CH 2基团(分别为6.7和6.9 kcal mol -1)。