A reaction course of the process which starts from (2E,4E)-1,5-diphenyl-2,4-pentandien-1-one 1 by reaction with sulfur and triethylamine at room temperature and completes to give phenyl(5-phenyl-2-thienyl)methanone 5, is proposed and discussed.
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Chiacchio et al. (1998) studied this question.
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