Conversion of 1,4-Diketones into <i>para</i>-Disubstituted Benzenes
作者:Vincent E. Ziffle、Ping Cheng、Derrick L. J. Clive
DOI:10.1021/jo101489g
日期:2010.12.3
Reaction of acetylides with aldehydes to form but-2-yne-1,4-diols, followed by triple bond reduction and oxidation of the hydroxyl groups, gives 1,4-diketones; these react with vinyllithium, and the resulting diols undergo ring-closing metathesis to form 2-cyclohexene-1,4-diols. Dehydration, usually by acid treatment, then gives benzenes carrying substituents in a 1,4 relationship. Use of substituted