The Diels-Alder reaction of 1-cyclobutenyl ketones with various 1,3-dienes in the presence of Lewis acid as a catalyst gave cycloadducts in good yields. 4-Acetylcyclooctadienones and 1-acetyl-1,3,5-cyclooctatrienes are obtained via the bicyclo[4.2.0]octa-2,4-dienes by the transformation to the trimethylsilyl enol ether or the allylic bromination with N-bromosuccinimide followed by dehydrobromination
Triethylaluminum Catalyzed Ring Opening Reaction of 1-Acetyl-2-[(trimethylsilyl)methyl]cyclobutanes. Stereoselective Preparation of (Z)-Enol Trimethylsilyl Ethers
作者:Tooru Fujiwara、Atsushi Suda、Takeshi Takeda
DOI:10.1246/cl.1991.1619
日期:1991.9
The triethylaluminum catalyzed ring opening reaction of 1-acetyl-2-[(trimethylsilyl)methyl]cyclobutanes gave (Z)-6-(trimethylsiloxy)-1,5-heptadienes stereoselectively. The starting materials were easily prepared by the 1,4-addition of (trimethylsilyl)methylmagnesium chloride to 1-cyclobutenyl ketones.