Reactions of N-Hydroxysuccinimide Esters of Anthranilic Acids with Anions of .BETA.-Keto Esters. A New Route to 4-Oxo-3-quinolinecarboxylic Acid Derivatives.
作者:Christos MITSOS、Alexandros ZOGRAFOS、Olga IGGLESSI-MARKOPOULOU
DOI:10.1248/cpb.48.211
日期:——
A new approach for the synthesis of 4-oxo-3-quinolinecarboxylic acid derivtives is described. This methodology involves the C-acylation of the anions of appropriate β-keto esters with novel N-hydroxysuccinimide esters of anthranilic acids. The intermediate C-acylation products 3 are spontaneously cyclized to afford 3-ethoxycarbonyl-4-oxoquinoline derivatives 4. The introduction of a variety of substituents at positins 1 and 2 of the quinoline ring is feasible with the selection of suitable anthranilic acids and β-keto esters. The structure of the obtained 2-substituted 3-ethoxycarbonyl-4-oxoquinolines was confirmed by IR and NMR spectral data.
本文介绍了一种合成 4-氧代-3-喹啉羧酸衍生物的新方法。该方法包括将适当的 β-酮酯阴离子与新型 N-羟基琥珀酰亚胺蒽酸酯进行 C-酰化。中间的 C-酰化产物 3 自发环化生成 3-乙氧羰基-4-氧代喹啉衍生物 4。通过选择合适的蒽酸和 β-酮酯,可以在喹啉环的阳离子 1 和 2 上引入各种取代基。红外光谱和核磁共振光谱数据证实了所获得的 2-取代 3-乙氧羰基-4-氧代喹啉的结构。