TES- and TBS-protected alcohols undergo deprotection in good to excellent yield upon heating with 1 equiv of BiOClO4-xH(2)O in CH2Cl2. TBDPS- and TIPS-protected 2degrees alcohols are more resistant to deprotection. The use of this method in selective desilylation is, however, limited to the deprotection of alkyl silyl ethers in the presence of TBDPS-protected phenols. (C) 2003 Elsevier Ltd. All rights reserved.
Diverse Site-Selective Transformation of Benzylic and Allylic Silyl Ethers via Organocatalytic Oxidation
作者:Shohei Hamada、Kaori Sakamoto、Eri Miyazaki、Elghareeb E. Elboray、Yusuke Kobayashi、Takumi Furuta
DOI:10.1021/acscatal.3c01153
日期:2023.6.16
the electronic properties of silylethers, thus enabling selective oxidation of benzylic and allylic silylethers, despite steric factors. A subsequent one-pot reduction accomplishes the formal deprotection to the corresponding benzylic and allylic alcohols. This catalytic system allows the direct oxidative desymmetrization of bis-benzylic and bis-allylic silylethers to access synthetically useful
作者:R.David Crouch、Candice A. Romany、Anna C. Kreshock、Karina A. Menconi、Jennifer L. Zile
DOI:10.1016/j.tetlet.2003.11.134
日期:2004.2
TES- and TBS-protected alcohols undergo deprotection in good to excellent yield upon heating with 1 equiv of BiOClO4-xH(2)O in CH2Cl2. TBDPS- and TIPS-protected 2degrees alcohols are more resistant to deprotection. The use of this method in selective desilylation is, however, limited to the deprotection of alkyl silyl ethers in the presence of TBDPS-protected phenols. (C) 2003 Elsevier Ltd. All rights reserved.
Practical method for hydroxyl-group protection using strontium metal and readily available silyl chlorides
We have found that the etherification of silyl-protected secondary alcohols proceeds smoothly in the presence of strontium metal using silyl chloride instead of the expensive, yet more reactive, and commonly used silyl triflate. The reaction occurred almost completely with various alcohols.