Oxidations dimethyl sulfoxide-phosphorus pentoxide

Related Reagents. A/-Chlorosuccinimide-Dimethyl Sulfide Chromic Acid Dimethyl Sulfide-Chlorine Dimethyl Sulfoxide-Acetic Anhydride Dimethyl Sulfoxide-Dicyclo-hexylcarbodiimide Dimethyl Sulfoxide-Oxalyl Chloride Dimethyl Sulfoxide-Phosphorus Pentoxide Dimethyl Sulfoxide-Sulfur Trioxide/Pyridine Dimethyl Sulfoxide-Trifluoroacetic Anhydride Dimethyl Sulfoxide-Triphosgene Manganese Dioxide Pyridinium Chlorochromate Pyridinium Dichromate Ruthenium(rV) Oxide Silver(I) Carbonate on Celite 1,1,1-Triacetoxy-1,1-dihydro-1,2-benziodoxol-3( 1 H)-ons. 

Secondary and tertiary alcohols can be dehydrated in dimethyl sulfoxide when heated to 160 -185°C for 14-16 hr to give olefins in yields of 70-85% [6]. The solution is diluted with water, extracted with petroleum ether (30°-60 C), dried, and then distilled. Other acid catalysts that have been reported for dehydration of alcohols are anhydrous or aqueous oxalic [7, 8], or phosphoric acid [9], and potassium acid sulfate [10,11]. In addition, acidic oxides such as phosphorus pentoxide [10-12] and acidic chlorides such as phosphorus oxychloride or thionyl chloride [13] have been reported to be effective as catalysts for the dehydration reaction. 

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