Thiopyrans and thiopyrylium salts from 1,5-diketones

It has been established that with hydrogen sulfide and hydrogen chloride acyclic 1,5-diketones form thiopyrans, thiopyrylium chlorides, or mixtures of them, depending on their structure and the reaction conditions. Some reactions of thiopyrylium chlorides and thiopyrans obtained for the first time have been studied.Translated from Khimiya Geterotsiklicheskikh Soedinenii, Vol. 6, No. 7, pp. 900–907, July, 1970.