93454-64-9Relevant academic research and scientific papers
Thiopyranothiopyran Chemistry. 2. Synthesis of 2,4-Diphenyl-4H-benzothiopyranothiopyran-10-one
Chen, Chin H.,Kelts, Larry W.,Luss, Henry R.,Fox, John L.
, p. 5143 - 5147 (2007/10/02)
2,4-Diphenyl-4H-benzothiopyranothiopyran-10-one was synthesized by lithiation of 3--4H-thiochroman-4-one, whose absolute configuration was established by X-ray crystallography.The yellow, insoluble solid obtained from this reaction was assigned the structure 2,6-diphenyl-2H-4-(2-mercaptobenzoyl)thiopyran 1-oxide (11), which, on brief heating with AcOH, yielded the title compound in 87percent yield.Treatment of 11 with 1percent aqueous cupric acetate in methylene chloride gave a new rearranged product, which was identified as 9,11-diphenylbenzo-1,8-dithiaspiro-deca-6,9-dien-4-one.Mechanisms that would account for the formation of both of these compounds are proposed.
