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Maryam GorjizadehDepartment of Chemistry, Shoushtar Branch, Islamic Azad University, Shoushtar Iran 64517-41117, IranE-mail: gorji80@yahoo.com Received February 10, 2013, Accepted March 18, 20133,4-Dihydropyrimidin-2(1H)-ones were efficiently converted into the corresponding pyrimidin-2(1 H)-ones inhigh yields within a short period of time on treatment with aqueous acetonitrile using 1,4-bis(triphenyl-phosphonium)-2-butene peroxodisulfate. Chemoselective oxidation of 3,4-dihydropyrimidin in the presence ofother oxidizable functional groups was also achieved by this reagent.Key Words : Dehydrogenation, Pyrimidin-2(1H)-ones, 3,4-Dihydropyrimidin-2(1H)-ones, 1,4-Bis(triphe-nylphosphonium)-2-butene peroxodisulfateIntroductionThe oxidation of 3,4-dihydropyrimidin-2(1H)-ones (DHPMs)to pyrimidin-2(1H)-ones is biologically and pharmaceuti-cally very important.

Novel and Chemoselective Dehydrogenation of 3,4-Dihydropyrimidin-2(1H)-ones with 1,4-Bis(triphenylphosphonium)-2-butene Peroxodisulfate