An efficient synthesis of 6-formyl-1,2-dihydro-2-oxo-3-pyridinecarboxylic acid and some carbonyl derivatives of it and its 6-acetyl homologue
作者:Joseph P. Sanchez、Thomas F. Mich、Gin G. Huang
DOI:10.1002/jhet.5570310207
日期:1994.3
a highly efficient, 4-step synthesis. This compound, along with its one carbon homologue, 6-acetyl-1,2-dihydro-2-oxo-3-pyridinecarboxylic acid (5b) has been reacted with several carbonyl derivative forming reagents to provide a series of side chains for β-lactams. Among these carbonyl derivatives are styrylamides which were prepared from Wittig and Horner-Emmons reagents. The preparation of the phosphonium
以1,1-二甲氧基-2-丙酮(1)为起始原料,通过高效的4步步骤大量制备了6-甲酰基-1,2-二氢-2-氧代-3-吡啶羧酸(5a)合成。该化合物及其一个碳同系物6-乙酰基-1,2-二氢-2-氧代-3-吡啶羧酸(5b)已与几种羰基衍生物形成试剂反应以提供一系列β-侧链内酰胺。在这些羰基衍生物中有由Wittig和Horner-Emmons试剂制备的苯乙烯基酰胺。还描述了salts盐和膦酸酯的制备。