Bp. Reddy et Gld. Krupadanam, THE SYNTHESIS OF 8-ALLYL-2-STYRYLCHROMONES BY THE MODIFIED BAKER-VENKATARAMAN TRANSFORMATION, Journal of heterocyclic chemistry, 33(6), 1996, pp. 1561-1565
Substituted-2-hydroxy-3-allylacetophenones 2 react with cinnamoyl chlo
rides 3 in potassium carbonate-acetone to give good yields of polyfunc
tional 1-(2-hydroxy-3-allylaryl)-5-aryl-4-pente 1,3-diones 4 which exi
st in their enol forms 5. These on acid catalysed cyclodehydration gav
e 70-80% yields of substituted 8-allyl-2-styrylchromones 6.