Tetrahedron letters

Synthesis of substituted dihydrobenzothiopyrans and dihydrobenzopyrans by cation-mediated cyclisation reactions

JF Bonfanti, D Craig

Index: Bonfanti, Jean-Francois; Craig, Donald Tetrahedron Letters, 2005 , vol. 46, # 21 p. 3719 - 3723

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Citation Number: 5

Abstract

Treatment with acid of thiosalicylaldehyde-and salicylaldehyde-derived phenyl 3-phenyl-2- propenyl thioethers and ethers possessing latent oxonium ion functionality triggers simple or tandem cyclisation to give substituted dihydrobenzothiopyrans and dihydrobenzopyrans. Some derivatisation reactions of the products are described.

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