New Route to Styrylchromones via [1-(2-Hydroxybenzoyl)alkylidene]triphenylphosphoranes
作者:F. Zammattio、J. D. Brion、P. Ducrey、G. Le Baut
DOI:10.1055/s-1992-26115
日期:——
Several [1-(2-hydroxybenzoyl)alkylidene]triphenylphosphoranes have been obtained in good yields through acylation of the corresponding alkylidenetriphenylphosphoranes, prepared in situ, by the easily available methyl 2-hydroxybenzoates. These ylides proved to be good starting materials for the synthesis of the corresponding 2-styrylchromones (2-styryl-4H-1-benzopyran-4-ones).
已通过将相应的亚烷基三苯膦(当场制备)与易获得的2-羟基苯甲酸甲酯进行酰化反应,获得了产率良好的数种[1-(2-羟基苯甲酰基)亚烷基]三苯膦。这些叶立德已被证实是合成相应2-苯乙烯基色酮(2-苯乙烯基-4H-1-苯并吡喃-4-酮)的良好起始材料。