Dimethyl(methylthio)sulfonium tetrafluoroborate triggers ionisation and cyclisation of hemithioacetals 3 to give tetrahydrofurans 8-11 in good yields and stereoselectivities. The homologous sulfone analogues 17 give tetrahydropyrans on treatment with ethylaluminium dichloride. (C) 1997 Elsevier Science Ltd.
机构:University Chemical Laboratory, Lensfield Road, Cambridge CB2 1EW, U.K.1 1 This work was initiated at the Department of Chemistry, Imperial College of Science and Technology, London
LEY, SV
KOUKLOVSKY, C
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机构:University Chemical Laboratory, Lensfield Road, Cambridge CB2 1EW, U.K.1 1 This work was initiated at the Department of Chemistry, Imperial College of Science and Technology, London
机构:University Chemical Laboratory, Lensfield Road, Cambridge CB2 1EW, U.K.1 1 This work was initiated at the Department of Chemistry, Imperial College of Science and Technology, London
LEY, SV
KOUKLOVSKY, C
论文数: 0引用数: 0
h-index: 0
机构:University Chemical Laboratory, Lensfield Road, Cambridge CB2 1EW, U.K.1 1 This work was initiated at the Department of Chemistry, Imperial College of Science and Technology, London