1,3-Benzyl Migration in Iminium Ions: Evidence for a Fast Free-Radical Chain Reaction
作者:Nancy Blank、Bernd F. Straub、Till Opatz
DOI:10.1002/ejoc.201101183
日期:2011.12
“endocyclic” Knabe rearrangement. A crossover experiment, isotopic labelling, the study of initiators and inhibitors as well as DFT calculations of gas-phase model structures provide evidence for a free-radical pathway under kinetic entropy control that is not affected by “slow” radical traps.
在衍生自 1-苄基-1,2,3,4-四氢异喹啉的亚胺盐中观察到的“环外”1,3-苄基位移与“环内”Knabe 重排有关。交叉实验、同位素标记、引发剂和抑制剂的研究以及气相模型结构的 DFT 计算为动力学熵控制下的自由基途径提供了证据,该途径不受“慢”自由基陷阱的影响。