Conversion of 1-benzyl-4-aminotetrahydropyridine-3-carboxylic acid methyl ester to antithrombotic pyrido[4,3-<i>d</i>]pyrimidine-2,4-diones and to (2-oxotetrahydropyrimidin-4-ylidene)acetic acid methyl esters
作者:H. Furrer、R. Wagner、H.-W. Fehlhaber
DOI:10.1002/jhet.5570310649
日期:1994.11
two methods. The thermal fusion of 1 with ureas gave the pyrido[4,3-d]-pyrimidine-2,4-diones 5a, 2 and 5b and unexpectedly the esters 6 and 7. The structure of 6 was deduced from its spectroscopic properties and was proven by ozonolysis to cleavage products 9 and 10 and by oxidative hydrolysis to pyrimidin-2-one 13. The (Z)-configured 6 was converted to (E)-configured 7 by methylation. The products 5a
6-苄基-3-甲基-5,6,7,8-四氢-1 H-吡啶基[4,3 - d ]嘧啶-2,4-二酮2,代表具有良好脑和外周作用的新型抗血栓化合物通过两种方法由烯胺1以高收率合成了α-己内酰胺。1与脲的热融合产生了吡啶并[4,3 - d ]-嘧啶-2,4-二酮5a,2和5b,出乎意料的是酯6和7。6的结构是由其光谱性质推导的,并通过臭氧分解法对产物9和10的裂解进行了证明。并通过氧化水解为嘧啶-2-酮13。(Z)-构型6通过甲基化转化为(E)-构型7。产物5a,5b和5c通过独立的方法合成。2的氢解反应生成仲胺15,该仲胺被烷基化为16的碱。