Reaction of sulfur with organic compounds

The effect of the number and position of phenyl groups in a four-carbon chain on the yields of di- and triphenylthiophenes in the reaction of sulfur with phenylbutanes was investigated. New, simple methods were developed for the synthesis of 2,3-diphenylthiophene (from 1,2-diphenylbutane), 3,4-diphenylthiophene (from 2,3-diphenylbutane), 2,5-diphenylthiophene (from 1,4-diphenylbutane), and 2,3,5-triphenylthiophene (from 1,3,4-triphenyl-1-butanone). Di-, tri-, and tetrasubstituted butanes, butenes, and butadienes that contain two aromatic substituents attached to the same carbon atom do not react with sulfur under the investigated conditions.See [1] for communication XXI.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 755–758, June, 1971.