摘要 |
<p> Disclosed is a process for preparing organosulfonium halide of the formula
<Chemistry id="chema01" num="0001"><Image id="ia01" he="20" wi="34" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein X is an halide, R,, R<Sub>2</Sub> and R<Sub>3</Sub> are the same or different and are selected from the group consisting of: alkyl having 1 to 24 carbon atoms, inclusive; allyl having 2 to 24 carbon atoms, inclusive; alkenyl having 2 to 24 carbon atoms, inclusive; alkynyl having 2 to 24 carbon atoms, inclusive; aryl having 6 to 24 carbon atoms, inclusive; and wherein said alkyl, allyl, alkenyl, alkynyl and aryl are optionally substituted with a group that is inert to organo-sulfides comprising: reacting an alcohol, e.g. methanol, with an halide derivative which when reacted with an organo-sulfide forms an organo- sulfonium halide, e.g., thionyl halide, sulfuryl halide and carbonyl halide; and then adding an organo-sulfide, e.g., dimethyl sulfide, to the above reaction mixture with agitation while allowing the gas formed to be eliminated so that the organosulfonium halide, e.g., trimethyl sulfonium halide, is formed. This process can take place in the presence of an inert solvent, e.g., methylene chloride.</p> |