Selenium-mediated conversion of alkynes into. alpha.-dicarbonyl compounds

…, L Testaferri, M Tingoli, D Chianelli…

Index: Tiecco, Marcello; Testaferri, Lorenzo; Tingoli, Marco; Chianelli, Donatella; Bartoli, Donatella Journal of Organic Chemistry, 1991 , vol. 56, # 14 p. 4529 - 4534

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Citation Number: 29

Abstract

The reaction of terminal and internal alkynes with diphenyl diselenide and ammonium peroxydisulfate in methanol proceeds smoothly to give a-keto acetals and a-keto ketals, respectively. This one-pot procedure is suggested to proceed through the initial formation of phenylselenenyl sulfate, a strong electrophilic reagent which effects the methoxyselenenylation of the alkynes. The addition products thus formed suffer ...