Saturated heterocycles, Part 172. Synthesis of 2,6-disubstituted-5,6,7,8-tetrahydropyrido[4,3-<i>d</i>]pyrimidine derivatives
作者:János Lázár、Gábor Bernáth
DOI:10.1002/jhet.5570270708
日期:1990.11
The title compounds were synthesized via the addition of methyl acrylate to benzylamine or to α-aminopyridine, which gave the corresponding diesters, e.g. 12, followed by Dieckmann condensation of the latter to yield the keto-esters 13, which were condensed with amidines and guanidines, 3, 14. Removal of the benzyl group by hydrogenolysis and subsequent alkylation of the nitrogen atom at position 6
通过将丙烯酸甲酯添加到苄胺或α-氨基吡啶上,合成标题化合物,得到相应的二酯,例如。12,然后由后者进行Dieckmann缩合,得到酮酯13,将其与am和胍3,14缩合。通过氢解除去苄基并随后将所得化合物5中6位的氮原子烷基化,同时改变C-2上的取代基,得到了许多具有潜在生物学作用的产物;其中一些具有止痛和抗炎作用。