Fries rearrangement of methoxyphenyl 3-methylbut-2-enoates
作者:F. Camps、J. Coll、O. Colomina、A. Messeguer
DOI:10.1002/jhet.5570220229
日期:1985.3
Friesrearrangement of 2-, 3- and 4-methoxyphenyl 3-methylbut-2-enoates 3-5 in methanesulfonic acid, polyphosphoric acid, aluminum chloride and under photochemical conditions have been studied. The outcome of the reactions was determined by the substitution pattern in the starting products and the reaction conditions used. Under Lewis acid catalysis, acylation accounted for the major components of
A systematic study of the reaction of a series of monosubstituted phenols 3 and 3-methylbut-2-enoic acid 4 in phosphorusoxychloride/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.