Regioselective synthesis of 3-(methylthio)phenols by formal [3+3]-cyclocondensations of 3-oxo-bis(methylthio)ketenacetals with 1,3-bis(trimethylsilyloxy)-1,3-butadienes and 1,3-dicarbonyl dianions
作者:Mathias Lubbe、Franziska Bendrath、Tiana Trabhardt、Alexander Villinger、Christine Fischer、Peter Langer
DOI:10.1016/j.tet.2013.03.069
日期:2013.7
The cyclization of 1,3-bis(trimethylsilyloxy)-1,3-butadienes with 3-oxo-bis(methylthio)ketenacetals afforded 3-(methylthio)phenols containing an acyl or ester substituent located at position 2. The cyclization of free 1,3-dicarbonyl dianions with 3-oxo-bis(methylthio)ketenacetals resulted in the formation of regioisomeric products containing an acyl group located at position 6.
用3-氧代-双(甲硫基)酮缩醛对1,3-双(三甲基甲硅烷氧基)-1,3-丁二烯进行环化,得到3-(甲硫基)苯酚,其含有位于位置2的酰基或酯取代基。游离基1的环化与3-氧代-双(甲硫基)酮缩醛的,3-二羰基二价阴离子导致形成在位置6处含有酰基的区域异构产物。