A Sulfitylation−Oxidation Protocol for the Preparation of Sulfates
作者:M. Huibers、Álvaro Manuzi、Floris P. J. T. Rutjes、Floris L. van Delft
DOI:10.1021/jo060404v
日期:2006.9.1
A novel, high-yielding method for sulfation of alcohols has been developed, proceeding via sulfite- and sulfate diester intermediates. Sulfite diesters serve as versatile sulfate monoester precursors, allowing for transformations that are difficult or impossible with the latter compounds.
Surface-mediated reactions. 3. Hydrohalogenation of alkenes
作者:Paul J. Kropp、Kimberlee A. Daus、Mark W. Tubergen、Keith D. Kepler、Vincent P. Wilson、Stephen L. Craig、Michelle M. Baillargeon、Gary W. Breton
DOI:10.1021/ja00061a005
日期:1993.4
inorganic acid halides that react in the presence of silica gel or alumina to generate hydrogen halides in situ. Treatment in this fashion of 1-propynylbenzene (1), which underwent no reaction in CH 2 Cl 2 solution saturated with HCl, readily afforded the syn addition product, alkenyl chloride (E)-4a. On extended treatment (E)-4a underwent subsequent isomerization to the thermodynamically more stable Z
New facile synthesis of α-hydroxyamides: Intermolecular and intramolecular catalysis in the reaction of α-hydroxycarboxylic acids with N-sulfinylamines.
作者:Jai Moo Shin、Yong Hae Kim
DOI:10.1016/s0040-4039(00)84412-3
日期:1986.1
α-Hydroxycarboxylic acids () reacted with N-sulfinylanilines () to give the corresponding α-hydroxyanilides () in quantitative yields under mild condition: the reaction appears to involve intermolecular catalysis by the carboxylic acid moiety and intramolecular catalysis by the hydroxyl group.
Optically active sulphinates with the sulphur atom as a sole centre at chirality are prepared by two methods. The first involves the reaction of symmetrical sulphites with tert-butylmagnesium chloride in the presence of optically active aminoalcohols. This new asymmetric, enantioselective synthesis affords t-butylsulphinates with 40–70% enantiomeric excess values. The second approach is based on a
Process for the Preparation of Onium Alkylsulfonates
申请人:Ignatyev Nikolai (Mykola)
公开号:US20080221334A1
公开(公告)日:2008-09-11
The invention relates to a process for the preparation of onium alkylsulfonates by reaction of an onium halide or carboxylate with a symmetrically substituted dialkyl sulfite or with an asymmetrically substituted dialkyl sulfite at temperatures of 50 to 170° C.