The indium(III) chloride-catalysed hydrolysis and in situ Mukaiyama-type reaction of arylmethyl ketone derived silyl enol ethers under solvent-free conditions
摘要:
Treatment of trimethylsilyl enol ethers of arylmethyl ketones with catalytic amounts of indium(111) chloride under solvent-free conditions leads to a remarkably efficient process of in situ hydrolysis and Mukaiyama-type addition to the resulting ketones. (C) 2003 Elsevier Ltd. All rights reserved.
The first 1,3-boronate rearrangement to ketones is reported. The reaction is driven by visible light irradiation, leading to various β-keto tertiary alcohols under metal-free conditions. The excited state overcomes the energy barrier for the rearrangement, and mechanistic studies have excluded a free-radical reaction pathway.