Efficient Synthesis of 4,7-Dihydro-1H-oxepino[2,3-c]pyrazoles by Potassium Carbonate Promoted [4+3] Annulation of Crotonate-Derived Sulfur Ylides with Benzylidenepyrazolones
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DOI: 10.1055/s-0037-1610693
Abstract: The [4+3] annulation reaction of crotonate-derived sulfur ylides with benzylidenepyrazolones using K2CO3 as the base is reported. The ready availability of starting materials and the simple cyclization procedure make this approach suitable for the preparation… read more here.
Keywords: ylides benzylidenepyrazolones; sulfur ylides; crotonate derived; derived sulfur ... See more keywords