A Simple and Practical Synthetic Protocol for Acetalisation, Thioacetalisation and Transthioacetalisation of Carbonyl Compounds under Solvent-Free Conditions
作者:Abu T. Khan、Ejabul Mondal、Subrata Ghosh、Samimul Islam
AN EFFICIENT METHOD FOR THE THIOACETALIZATION OF CARBONYL COMPOUNDS IN THE PRESENCE OF CATALYTIC AMOUNTS OF BENZYLTRIPHENYLPHOSPHONIUM TRIBROMIDE
作者:A. R. Hajipour、S. A. Pourmousavi、A. E. Ruoho
DOI:10.1080/00304940709458596
日期:2007.8
in multi-step syntheses. Among carbonyl protecting groups, dithioacetals constitute an important class of compounds as acyl anion equivalents' or masked methylene functions in carbon-carbon bond forming reactions. They are versatile2 due to their straightforward preparation and also to their stability under basic or mildly acidicconditions. Although several methods have been reported for protection
An Efficient Method for Thioacetalization of Carbonyl Compounds in the Presence of a Catalytic Amount of Benzyltriphenylphosphonium Tribromide Under Solvent-Free Conditions
作者:Abdol R. Hajipour、Seied A. Pourmousavi、Arnold E. Ruoho
DOI:10.1080/10426500601088739
日期:2007.3.15
variety of carbonylcompounds have been successfully converted to the corresponding thioacetal derivatives in good to excellent yields on the reaction of carbonylcompounds with 1,2-ethanedithiole, 1,3-propanedithiol, and ethanethiol in the presence of catalytic amount of benzyltriphenylphosphonium tribromide under solvent-free conditions. Some of the major advantages of this method are mild reaction conditions
Elemental fluorine. Part 5. Reactions of 1,3-dithiolanes and thioglycosides with fluorine–iodine mixtures
作者:Richard D. Chambers、Graham Sandford、Matthew E. Sparrowhawk、Malcolm J. Atherton
DOI:10.1039/p19960001941
日期:——
1,3-Dithiolanes, prepared from diaryl ketones, react with elemental fluorine–iodine mixtures to give the corresponding difluoromethylene derivatives. Under the same conditions, thioglycosides give glycosyl fluorides in good yields. Reaction of 1,3-dithiolanes with fluorine in aqueous acetonitrile provides a remarkably mild method for efficient deprotection to the parent ketone.
Efficient Method for Thioacetalization of Carbonyl Compounds in the Presence of a Catalytic Amount of Benzyltriphenylphosphonium Tribromide (BTPTB) under Solvent-Free Conditions
作者:Abdol Reza Hajipour、Seied A. Pourmousavi、Arnold E. Ruoho
DOI:10.1080/00397910802219197
日期:2008.7.24
Abstract A variety of carbonylcompounds have been successfully converted to the corresponding thioacetal derivatives in good to excellent yields on reaction of carbonylcompounds with 1,2-ethanedithiole, 1,3-propanedithiol, and ethylthiol in the presence of a catalytic amount of benzyltriphenylphosphonium tribromide (BTPTB) under solvent-free conditions. Some of the major advantages of this method