Unsymmetrical Unsaturated Ketones from Lactones and Carboxylic Acids in One Step
作者:Wolfgang Giersch、Ferdinand Naef
DOI:10.1002/hlca.200490154
日期:2004.7
A one-step transformation of γ- and δ-(spiro)lactones into γ,δ- and δ,ε-unsaturated ketones in the presence of carboxylicacids in the vapor phase at 400° over a supported manganese catalyst is reported for the first time. The scope of this new transformation is exemplified with a series of lactones, and a mechanistic rationale is proposed.