Direct synthesis of carbonyl compounds from THP ethers with IBX in the presence of β-cyclodextrin in water
摘要:
Water, an environmentally friendly reaction medium, has been utilized for the oxidative deprotection of tetrahydropyranyl ethers 1 with lBX at room temperature in the presence of beta-cyclodextrin to give the corresponding carbonyl compounds 2. (C) 2005 Elsevier Ltd. All rights reserved.
An Efficient and Selective Deprotection of Tetrahydropyranyl Ethers by CeCl<sub>3</sub>.7H<sub>2</sub>O
作者:G. Sudhakar Reddy、Paravathi Neelakantan、D. S. Iyengar
DOI:10.1080/00397910008087027
日期:2000.11
Abstract Treatment of tetrahydropyranylethers with cerium (III) chloride heptahydrate in methanol provides a simple, convenient and selective method for detetrahydropyranylation, and the parent alcohols are obtained in high yields.
Chemoselective trimethylsilylation and tetrahydropyranylation of benzylic and primary and secondary aliphatic alcohols proceed efficiently in the presence of 1,3-dibromo-5,5-dimethylhydantoin (DBH) under mild and completely heterogeneous reaction conditions in excellent yields.
Facile Tetrahydropyranylation of Alcohols and Phenols Using Anhydrous Calcium Chloride under Mild and Neutral Conditions
作者:Babasaheb P. Bandgar、Vaibhav S. Sadavarte、Lavkumar S. Uppalla、Suresh V. Patil
DOI:10.1007/s00706-002-0468-9
日期:2003.2.1
Treatment of 3,4-dihydro-2 H -pyran with various alcohols and phenols in the presence of a catalytic amount of anhydrous calcium chloride in dichloromethane furnished tetrahydropyranyl ethers under almost neutral conditions.
Efficient Tetrahydropyranylation of Alcohols and Detetrahydropyranylation Reactions in the Presence of Catalytic Amount of Trichloroisocyanuric Acid (TCCA) as a Safe, Cheap Industrial Chemical
Abstract Preparation and cleavage of THP ethers of different hydroxy functional groups are easily and efficiently performed in the presence of trichloroisocyanuric acid (TCCA) in the absence of solvent with high yields.
The addition of benzoic acid as a co-catalyst facilitating cooperative Brønsted acid catalysis was found to be valuable for reactions involving phenols and higher substituted alcohols. Mechanistic investigations, including kinetic and 1H NMR binding studies in conjunction with density function theory calculations, are described that collectively support a Brønsted acid mode of catalysis.