Tetrahedron letters

2, 6-Diphenyl-4H-chalcogenopyran-4-ones and 2, 6-diphenyl-4H-chalcogenopyran-4-thiones: a new catalyst for the Baylis-Hillman reaction

T Iwama, H Kinoshita, T Kataoka

文献索引：Iwama, Tetsuo; Kinoshita, Hironori; Kataoka, Tadashi Tetrahedron Letters, 1999 , vol. 40, # 19 p. 3741 - 3744

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被引用次数: 40

摘要

2, 6-Diphenyl-4H-chalcogenopyran-4-ones and 2, 6-diphenyl-4H-chalcogenopyran-4- thiones, a new series of catalysts for the Baylis-Hillman reaction, were investigated. The reactions proceeded smoothly in the presence of 1 mol eq. of TiCl4 under atmospheric pressure at 0° C, giving adducts in moderate to high yields. Chalcogenopyranones and chalcogenopyranthiones were a more efficient kind of catalyst than Me2S.