作者:Vishnu K. Tandon、Kunwar A. Singh、Anoop K. Awasthi、Hardesh K. Maurya、Sanjay K. Gautam
DOI:10.3987/com-08-s(s)4
日期:——
Favorskii type rearrangement of cyclic α-bromo ketones 2 is promoted by NiCl 2 in refluxing methanol, giving the rearranged carboxylic acid ester 3 in excellent yields. The reaction of 4-bromo-2,3,4,5-tetrahydronaphth [2,1-b]oxepin-5-one (5) and its regioisomer 8 with NiCl 2 in MeOH resulted in Favorskii rearranged carboxylic acid esters 6 and 9 respectively.
NiCl 2 在回流的甲醇中促进了环状 α-溴酮 2 的 Favorskii 型重排,从而以优异的收率得到重排的羧酸酯 3。4-bromo-2,3,4,5-tetrahydronaphth [2,1-b]oxepin-5-one (5) 及其区域异构体 8 与 NiCl 2 在 MeOH 中的反应导致 Favorskii 重排羧酸酯 6 和 9分别。