Syntheses of some Cinnamoylcoumaran-3-ones

Chemical Laboratory, P. G. Department of Chemistry, Bhagalpur University, Bhagalpur-812 007 Manuscript received 3 March 1989, accepted 18 June 1989 Five 4'-methoxypheny1-2-cinnanioyloxyacetophenones have been obtained by reaction of the related hydroxyacetophenones with p-methoxycinnamic acid using pyridine as a solvent and POCl3. Bromination with CuBr2 yielded the ω-bromo-ester, which on Baker-Venkataraman rearrangement gave the title compounds, the structures of which were confirmed by analysis and spectral data