Heterocycles p. 593 - 600 (2010)
Update date:2022-08-30
Topics:
Tandon, Vishnu K.
Awasthi, Anoop K.
Singh, Kunwar A.
Maurya, Hardesh K.
Gautam, Sanjay K.
Favorskii type rearrangement of cyclic α-bromo ketones 2 is promoted by NiCl2 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 NiCl2 in McOH resulted in Favorskii rearranged carboxylic acid esters 6 and 9 respectively.
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