5-diaryl-2,4 pentadienylidene) N′-(acyl) hydrazinium salts 2. The synthesis of di- and tri-pyridinio substituted polycarboxamides 3e-g demonstrate the validity of the method. The kinetics of the process indicate that the limiting rate of the reaction is the all trans - all cis interconversion of 2. A single crystal determination confirm the structure of 3b.
                                    我们描述carboxonium盐的简便一锅反应1与酰基
肼,得到官能化1-
氨基吡啶盐的高收率3 throught N-的分子内环化(5-乙氧基1,5-二芳基-2,4- pentadienylidene)N' - (酰基)
肼盐2。二
吡啶和三
吡啶取代的羧酰胺3e-g的合成证明了该方法的有效性。该过程的动力学表明,该反应的限制率是所有反式-所有顺式的互换2。单晶测定确定了3b的结构。