Synthesis of Spiro[5.4]decenones and Their Transformation into Bicyclo[4.4]deca-1,4-dien-3-ones by Domino ?Elimination- Double-Wagner-Meerwein-Rearrangement? Reactions
作者:Gopal Bose、Ehsan Ullah、Peter Langer
DOI:10.1002/chem.200400707
日期:2004.12.3
The [3+3] cyclization of 1,3-bis-silylenolethers with 1,1-diacylcyclopentanes allows a convenient synthesis of spiro[5.4]decenones. Treatment of these compounds with trifluoroacetic acid (TFA) afforded a great variety of bicyclo[4.4.0]deca-1,4-dien-3-ones containing an angular alkyl group. This core structure occurs in a number of pharmacologically relevant natural products.