Alcohols were acetylated or formylated with triphenylphosphine and carbon tetrabromide in ethylacetate or ethyl (or methyl) formate at room temperature. THP or TBDMS ether of primary alcohol got converted into formate or acetate under the experimental conditions employed in one pot operation.
Differentiating CBr and CCl Bond Activation by Using Solvent Polarity: Applications to Orthogonal Alkyl-Alkyl Negishi Reactions
作者:Niloufar Hadei、George T. Achonduh、Cory Valente、Christopher J. O'Brien、Michael G. Organ
DOI:10.1002/anie.201100705
日期:2011.4.18
A pot to share: A CalkylClbond can be rendered “dormant” or “active” in the Negishialkyl–alkyl cross‐coupling by a simple solventpolarity “switch” (see scheme). Adjustment from a 1:2 to a 2:1 solvent ratio of dimethylimidazolidinone:tetrahydrofuran enables orthogonalalkyl–alkylNegishi cross‐coupling strategies to be carried out on bifunctional bromochloroalkanes in one pot at room temperature
A simple, efficient and highly selective deprotection of t-butyldimethylsilyl (TBDMS) ethers using silica supported sodium hydrogen sulfate as a heterogeneous catalyst
作者:Biswanath Das、K. Ravinder Reddy、P. Thirupathi
DOI:10.1016/j.tetlet.2006.06.088
日期:2006.8
t-Butyldimethylsilyl (TBDMS) ethers have been efficiently and selectively deprotected usingsilicasupportedsodiumhydrogensulfate (NaHSO4·SiO2) as a heterogeneous catalyst at room temperature to regenerate the parent alcohols in high yields.
A facile and catalytic method for selective deprotection of tert-butyldimethylsilyl ethers with copper(II) bromide
作者:Suchitra Bhatt、Sandip K. Nayak
DOI:10.1016/j.tetlet.2006.09.073
日期:2006.11
Copper(H) bromide is found to be a simple and efficient catalyst for selective deprotection of tert-butyidimethylsilyl ethers of alcohols/phenols at ambient temperature. Various labile functional groups such as ketal, alkene, ketone, OTBDPS, OTHP and allyl and benzyl ethers are found to be compatible under the reaction conditions. (c) 2006 Elsevier Ltd. All rights reserved.
Mild deprotection of tert-butyl and tert-amyl ethers leading either to alcohols or to trialkylsilyl ethers
作者:Xavier Franck、Bruno Figadère、André Cavé
DOI:10.1016/0040-4039(94)02340-h
日期:1995.1
Tert-butyl and tert-amyl ethers afford the corresponding tert-butyldimethylsilyl ethers when treated by one equivalent of tert-butyldimethylsilyl triflate (TBDMSOTf), followed by one equivalent of 2,6-lutidine. However, treatment by a catalytic amount of TBDMSOTf without base, led to the corresponding free alcohols.