The styrlpyridinethione 1a–c reacted with several halogenated compounds; ω-bromoacetophenone, methyl chloroacetate, α-chloroacetylacetone and ethyl-α-chloroacetoacetate to give the corresponding thieno[2,3-b]pyridines 3a–c, 11a–c and the thiazolo[3,2-α]pyridines 14a–c.
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Attaby et al. (1995) studied this question.