作者:F. Camps、J. Coll、O. Colomina、A. Messeguer
DOI:10.1002/jhet.5570220229
日期:1985.3
Fries rearrangement 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
已经研究了在甲磺酸,多磷酸,氯化铝中和在光化学条件下2-,3-和4-甲氧基苯基3-甲基丁-2-烯酸酯3-5的薯条重排。反应的结果取决于起始产物中的取代方式和所用的反应条件。下路易斯酸催化,酰化占反应混合物的主要成分,导致茚满酮和2,3-二氢4的形成ħ分别-1-苯并吡喃-4-酮在的情况下ø -和米-酯3和5,而烷基化得到二氢香豆素是对酯5的优选途径。另一方面,在所有情况下,o-酰化是光化学重排中的主要反应过程。