bear radical‐stabilizing N substituents, such as benzyl, cinnamyl, and diarylmethyl, undergo facile homolytic CN bond scission under mild conditions to give products of formal [1,3] rearrangement rather than benzoin condensation. EPR experiments and computational analysis support a radical‐based mechanism. Implications for thiamine‐based enzymes are discussed.
带有自由基稳定N取代基(例如苄基、肉桂基和二芳基甲基)的Breslow中间体在温和条件下容易发生C - N键均裂,得到正式的[1,3]重排产物而不是
安息香缩合产物。EPR 实验和计算分析支持基于激进的机制。讨论了
硫胺素酶的影响。