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Synthesis 1988; 1988(1): 68-70
DOI: 10.1055/s-1988-27468
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Smooth Conversion of 3,4-Diarylcoumarins and 3,4,5-Triaryl-2(5H)-furanones to 2H-Chromene and 2,5-Dihydrofuran Derivatives with Dimethyl Sulfide-Borane Complex

Parul Verma* , Sangeeta Singh, D. K. Dikshit, Suprabhat Ray
  • *Medicinal Chemistry Division, Central Drug Research Institute, Lucknow, India
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Publication Date:
12 September 2002 (online)

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Reaction of 3,4-diarylcoumarins (3,4-diaryl-2-oxo-2H-1-benzopyrans) and 3,4,5-triaryl- 2(5H)-furanones with dimethyl sulfide-borane complex affords the corresponding 2H-chromenes (2H-1-benzopyrans) and 2.5-dihydrofurans in high yields. 3,4-Diaryl-2(5H)-furanones afford the corresponding furans.