Synthesis of 5-mono- and 5,7-diamino-pyrido[2,3-<i>d</i>]-pyrimidinediones with potential biological activity by regioselective amination
作者:Dang Van Tinh、Wolfgang Stadlbauer
DOI:10.1002/jhet.5570450329
日期:2008.5
triphenyl-phosphane via Staudinger reaction. Hydrolysis with aqueous acetic acid produced in one step 7-unsubstituted-amino-pyrido[2,3-d]pyrimidine-2,4-diones 12. In a similar amination reaction, 5-chloropyrido[2,3-d]pyrimidine-2,4,7-triones 13 were aminated and formylated to 5-alkyl/arylamino-6-formyl derivatives 14-16 in a combined one-step-reaction with bulky arylamines or alkylamines in the presence of dimethylformamide
由相应的5,7-二氯制备5-烷基-/芳基氨基-和5,7-二烷基/芳基氨基-吡啶并[2,3- d ]嘧啶-2,4-二酮(4,5,7-9)。在区域选择性反应中与脂肪族和芳香族胺3和6一起合成-pyrido [2,3- d ] pyrimidine-2,4-diones 2。通过5-氨基-7-氯衍生物4的叠氮化而获得的7-单叠氮化物10通过Staudinger反应与三苯基膦反应而转化为亚氨基正膦。用一步法制得的乙酸水溶液水解7-未取代的氨基-吡啶并[2,3 - d ]嘧啶-2,4-二酮12。以类似的胺化反应中,5-氯吡啶并[2,3- d ]嘧啶-2,4,7-三酮13进行胺化和甲酰化,5-烷基/芳基氨基-6-甲酰基衍生物14 - 16在组合的单步-在二甲基甲酰胺的存在下与庞大的芳胺或烷基胺的反应。