Synthetic Communications p. 1857 - 1872 (1999)
Update date:2022-08-04
Topics: Oxidation Dehydrogenation Experimental terms Transformation 1-thioflavonoids
Somogyi
Simple, efficient and selective new one-step transformations with DDQ, IBDA and I2/DMSO are presented for the dehydrogenation of thioflavanone (1α), as well as the oxidized (1c) and halogenated (1d) derivatives. Ring- contraction reactions of the 1-oxide 1b and 1d leading to the formation of the benzothiophen derivatives 3a and 5, respectively, are also described.
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