Benzannulation of Substituted 3-Alkoxycarbonylhex-3-en-5-ynoic Acids: A New Route to 4-Substituted 3,5-Dihydroxybenzoic Acids Derivatives
作者:Stefano Serra、Claudio Fuganti
DOI:10.1055/s-2002-34212
日期:——
A new regioselective pathway to 4-substituted 3,5-dihydroxybenzoic acids derivatives is described here. According to this procedure substituted propargylic aldehydes are converted into substituted 3-alkoxycarbonylhex-3-en-5-ynoic acids, which are in turn, treated with acetic anhydride in the presence of sodium acetate to give the substituted benzoic acids derivatives. The aromatic moiety constructed
4-取代的 3,5-二羟基苯甲酸衍生物的新区域选择性途径在这里描述。根据该方法,取代的炔丙醛转化为取代的3-烷氧基羰基己-3-烯-5-炔酸,然后在乙酸钠存在下用乙酸酐处理,得到取代的苯甲酸衍生物。使用后一种苯并环化反应构建的芳族部分以区域选择性方式形成,并且可以容忍一系列取代基。