On the synthesis of substituted 2,2-dimethyl1-4-chromanones and related compounds

Article abstract of DOI:10.1016/S0040-4039(00)78859-9

A systematic study of the reaction of a series of monosubstituted phenols 3 and 3-methylbut-2-enoic acid 4 in phosphorus oxychloride/zinc chloride revealed that the formation of 4-chromanones was strongly infuenced by the substituents and their position on the aromatic ring of the starting phenols.