A Mild and Efficient Oxidative Deprotection of THP Ethers with NBS in the Presence of β-Cyclodextrin in Water
作者:K. Rao、M. Narender、M. Reddy
DOI:10.1055/s-2004-829148
日期:——
An efficient and user-friendly procedure has been developed for the oxidative deprotection of tetrahydropyranyl (THP) ethers with N-bromosuccinimide (NBS) using β-cyclodextrin (β-CD) in water. A series of tetrahydropyranyl ethers were oxidatively deprotected at room temperature in impressive yields.
Selective, Convenient and Efficient Deprotection of Trimethylsilyl and Tetrahydropyranyl Ethers, Ethylene Acetals and Ketals with Oxone under Non-aqueous Conditions
An efficient and selective method for the deprotection of trimethylsilyl (TMS) and tetrahydropyranyl (THP) ethers, ethylene acetals and ketals to their corresponding alcohols and carbonyl compounds using oxone in refluxing acetonitrile is described. Excellent chemoselectivity of this method makes it a useful and practical procedure in organic synthesis.
Chemoselective Tetrahydropyranylation of Alcohols and Their Detetrahydropyranylation Using Silicasulphuric Acid as a Reusable Catalyst
作者:D. M. Pore、Uday V. Desai、R. B. Mane、P. P. Wadgaonkar
DOI:10.1081/scc-120038489
日期:2004.12.31
Abstract A simple, mild, and efficient protocol for chemoselective protection of alcohols over phenols as tetrahydropyranyl ethers and their deprotection using silicasulphuric acid as a reusable solid acidcatalyst is described.
The synthetic utility of potassium dichromate in the presence of Lewis acids under solid phase conditions is described. This reagent efficiently oxidizes alcohols, acyloins, oximes and semicarbazones to their corresponding carbonyl compounds, while trimethylsilyl and tetrahydropyranylethers, ethylene acetals and ketals undergo oxidative deprotection to produce carbonyl compounds efficiently.
Mild and Efficient Chemoselective Tetrahydropyranylation of Alcohols Using Brønsted Acidic Ionic Liquid as Catalyst Under Solvent-Free Conditions
作者:Abdol R. Hajipour、Zahra Nasresfahani
DOI:10.1080/00397911.2010.551286
日期:2012.7.1
Abstract A straightforward and efficient method for preparation of morpholinium bisulfate ([mroH]HSO4) as a novel acidic ionic liquid is reported. The application of this efficient and inexpensive acidic ionic liquid catalyst for tetrahydropyranylation of alcoholsundermild and solvent-freeconditions at room was investigated. GRAPHICAL ABSTRACT