-------------------------------------------------------------------------------------------S1 2. Synthesis of 4-Substituted Pyridine-2,6-Dicarboxylic Acid Esters 1 --------------------S2 3. Transformation of 1 to 4-Substituted Pyridine-2,6-Dicarboxylic Acids 3 --------------S5 4. Transformation of 1g to 4 and 5 --------------------------------------------------------------S5 5. References ------------
1. 总则---------------------------------------------------------- --------------------------------------------S1 2. 4的合成-取代的
吡啶-2,6-二
羧酸酯 1 --------------------S2 3. 1 到 4-取代的
吡啶-2,6-二
羧酸的转化3 --------------S5 4. 1g到4和5的转换 ------------- -------------------------------------S5 5. 参考文献 --------- -------------------------------------------------- ---------------------------------------S6 6. 核磁共振谱 ------------------