1,6- and 1,7-naphthyridines. I. Rearrangement of quinolinimidoacetic acid derivatives
作者:Mercedes Blanco、M. Gabriela Lorenzo、Isabel Perillo、Celia B. Schapira
DOI:10.1002/jhet.5570330226
日期:1996.3
The reaction of N-substituted quinolinimides 1a-d with sodium alkoxides afforded a mixture of 1,6-naphthyridines 2 and 1,7-naphthyridines 3 which were isolated by chromatographic methods. Structure assignment for each pair of isomers was made by comparison of their 1H nmr spectra with those of picolinamide and nicotinamide. When esters 1a-c were treated with alkoxides from primary alcohols, other than
的反应Ñ取代quinolinimides 1A-d与得到的1,6-萘啶2和其通过色谱方法分离1,7-萘啶3的混合物的醇钠。通过将它们的1 H nmr光谱与吡啶甲酸酰胺和烟酰胺的光谱进行比较,确定每对异构体的结构。当将酯1a -c用来自伯醇的醇盐而不是酯的醇盐处理时,发生了全部酯交换反应。实验结果表明,酯交换反应发生在开放的中间物种中。