1,5-Diarylpent-1-yne-3,5-diones (1) reacted with sodium sulphide in 60% dioxane-water mixture at 15-degrees or fusion at 160-1700 to give a mixture of the corresponding 2,6-diaryl-4-pyrones (2) 4-thiones (3) and 5-aryl-2-benzylidene-3(2H)-thiophenethiones (4). The structure of the above compounds was confirmed from their spectral characteristics. The mechanisms for these transformations are discussed.
MOHAMED GABER MAREI ,
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