The sila-Pummerer reaction of γ-silyl substituted cycloalkanoyl sulfoxides: the first examples and a new approach to 3-substituted cycloalk-2-enones
作者:Maciej Mikina、Marian Mikołajczyk
DOI:10.1016/j.tetlet.2014.04.128
日期:2014.7
The thermal decomposition of 3-(alpha-trimethylsilyl)alkyl substituted 2-(phenylsulfinyl)cycloalkanones occurs via the gamma-sila-Pummerer reaction, affording 3-substituted cycloalk-2-enones and unstable trimethylsilyl benzenesulfenate as an elimination by-product. The starting gamma-silyl substituted cycloalkanoyl sulfoxides were obtained through the conjugate addition reaction of nucleophilic reagents to 2-(phenylsulfinyl)cycloalk-2-enones. The tandem conjugate addition/gamma-sila-Pummerer reaction investigated here provides a new route to 3-substituted cycloalk-2-enones. (C) 2014 Elsevier Ltd. All rights reserved.