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Report | Regular issue | Vol 14, No. 11, 1980, pp.1775-1777
Published online, 1st January, 1970
DOI: 10.3987/R-1980-11-1775
A General Approach to the Synthesis of Substituted 5a,11a-Dehydro[1]benzopyran[4,3-c][1]benzopyran-5-ones

Vernon G. S. Box* and Clement G. Humes

*Department of Chemistry, Mona Campus, University of the West Indies, Mona, Kingston 7, Jamaica


A general approach to the syntheses of 5a,11a-Dehydro-[1]benzopyran[4,3-c][1]benzopyran-5-ones by the Claisen rearrangement of 3-bromo-4-Aryloxymethylcoumarins is outlined. The possible uses of these 5a-11a-Dehydro-[1]benzopyran[4,3-c][1]benzopyran-5-ones in the syntheses of isoflavanoids and rotenoids are discussed.