Heterocyclic synthesis by C-C bond formation. Tetrahydrofuran and tetrahydropyran synthesis via oxonium ion-mediated cyclisation reactions
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 ethy
Craig, Donald,King, N. Paul,Shaw, Antony N.
p. 8599 - 8602
(2007/10/03)
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