Metal catalysed rearrangement of cyclopropanespiro-β-lactones to 2-furanones
作者:Niall W.A. Geraghty、Paul A. Murphy
DOI:10.1016/s0040-4039(00)73482-4
日期:1994.9
The rearrangement of 5-oxo-4-oxaspiro[2.3]hexanes (cyclopropanespiro-β-lactones) to 2(5H)-furanones and 2(3H)-furanones is shown to be a general reaction which is promoted by metal catalysts. A mechanism is proposed, involving the novel insertion of a metal species into the OCβ bond of the β-lactone ring, which explains the basic features of the reaction, including its regioselectivity.