The aryneinsertion into “S═O” bond has been validated recently. This technology is elusively applied to the synthesis of thioethers. In contrast to the reported cases, the reaction described furnished o-aryloxy triarylsulfonium salts, in lieu of thioethers, in good to excellent yields. The reaction is also featured by its exquisite regioselectivity, broad substrate scope, and mild conditions (25 °C)
Mild and efficient silylation of alcohols and phenols with HMDS using Bi(OTf)3 under solvent-free condition
作者:Santosh T. Kadam、Sung Soo Kim
DOI:10.1016/j.jorganchem.2009.04.001
日期:2009.7
A very efficient and mildsilylation of alcohols and phenols with hexamethyldisilazane (HMDS) at rt is developed using Bi(OTf)3 as the catalyst. Primary, secondary and tertiary alcohols as well as phenols are excellently converted into corresponding TMS ethers in a very short reaction time. This procedure can also be applied to large scale silylation for industrial application.
Catalyst-free silylation of alcohols and phenols by promoting HMDS in CH<sub>3</sub>NO<sub>2</sub>as solvent
作者:Santosh T. Kadam、Sung Soo Kim
DOI:10.1039/b913398d
日期:——
An uncatalyzed method for the silylation of alcohols and phenols with HMDS in CH3NO2 at rt is developed. A diverse range of aromatic and aliphatic alcohols as well as phenols undergo the silylation in very short reaction time with excellent yield. The uncatalyzed reaction requires neither elevated temperature nor high pressure for the silylation.
Silica Sulfuric Acid as a Reusable Catalyst for Efficient and Simple Silylation of Hydroxyl Groups Using Hexamethyldisilazane (HMDS)
作者:Hossein Ghafuri、Bagher Eftekhari-Sis、Mohammed M. Hashemi
DOI:10.1080/10426500701289781
日期:2007.6.1
At room temperature, alcohols and phenols are efficiently protected with hexamethyldisilazane (HMDS) in the presence of silica sulfuric acid in good to excellent yields. The catalyst can be recycled for subsequent reactions without any appreciable loss of efficiency.
Nafion® SAC-13: heterogeneous and reusable catalyst for the activation of HMDS for efficient and selective O-silylation reactions under solvent-free condition
作者:Gurusamy Rajagopal、Hanbin Lee、Sung Soo Kim
DOI:10.1016/j.tet.2009.04.025
日期:2009.6
hexamethyldisilazane (HMDS) for the efficient and selective silylation of alcohols. Primary, secondary, and tertiaryalcohols and phenols are efficiently converted to their corresponding silylethers in short reaction times (4–8 min) with excellent yield at rt under solvent-free condition. Simple and clean reactions, high yield of the products and efficient recycling of the catalyst are the salient features of