A new synthesis of unsymmetrical diphenic acid derivatives: template-directed intramolecular Ullmann coupling reaction
作者:Masami Takahashi、Tooru Kuroda、Tsuyosi Ogiku、Hiroshi Ohmizu、Kazuhiko Kondo、Tameo Iwasaki
DOI:10.1016/0040-4039(91)80444-b
日期:1991.11
Intramolecular Ullmann coupling reaction of the diesters (6, 9), which were prepared by regioselective acylation of salicyl alcohol by using the two different substituted 2-iodobenzoyl chlorides, afforded the unsymmetrical diphenic acid derivatives (7, 10). Hydrogenolysis of the Ullmann coupling product (7) afforded the monoester (12) in an excellent yield.
二酯(分子内Ullmann偶合反应6,9,其制备由水杨醇的区域选择性酰化,通过使用两种不同的取代基的2-碘代苯甲酰氯),得到不对称的联苯羧酸衍生物(7,10)。乌尔曼偶联产物(7)的氢解以优异的产率提供了单酯(12)。