作者:Chakrapani Subramanyam、Sankar Chattarjee、John P Mallamo
DOI:10.1016/0040-4039(95)02198-1
日期:1996.1
practical synthesis of the title compounds (3a-c, e) from commercially available 3-hydroxy-2-pyridine carboxylic acid (4) is reported. The key step in the synthetic sequence involves a Pd-catalyzed cross coupling reaction of the triflate 6 with the appropriate alkyl or aryl derivatives to generate the substituted picolinic acid esters 7a-b, 8 and 11. Catalytic reduction of these picolinic acid esters provided
据报道由市售的3-羟基-2-吡啶羧酸(4)实际合成标题化合物(3a-c,e)。合成顺序中的关键步骤涉及三氟甲磺酸酯6与适当的烷基或芳基衍生物的Pd催化的交叉偶联反应,以生成取代的吡啶甲酸酯7a-b,8和11。这些吡啶甲酸酯的催化还原以良好的收率提供了标题化合物。