Verification of stereospecific dyotropic racemisation of enantiopure d and l-1,2-dibromo-1,2-diphenylethane in non-polar media
作者:D. Christopher Braddock、Debjani Roy、Dieter Lenoir、Edward Moore、Henry S. Rzepa、Judy I-Chia Wu、Paul von Ragué Schleyer
DOI:10.1039/c2cc33676f
日期:——
The first example of a dyotropic rearrangement of an enantiomerically pure, conformationally unconstrained, vicinal dibromide confirms theoretical predictions: D and L-1,2-dibromo-1,2-diphenylethane racemise stereospecifically in refluxing benzene without crossover to the meso-isomer. An orbital analysis of this six-electron pericyclic process is presented.
第一个例子显示了一个对映体纯、构象无约束的邻位二溴化物的双重重排,证实了理论预测:D型和L型1,2-二溴-1,2-二苯乙烷在沸腾的苯中立体特异性地互变,而没有转化为美索异构体。本文呈现了对此六电子环状过程的轨道分析。