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首页> 外文期刊>Synthetic Communications >A regioselective and convenient one-pot multicomponent synthesis of polyfunctionalized 4-aryl-2-cyanoimino-3,4- dihydro-1H-pyrido[2,3-d]pyrimidines
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A regioselective and convenient one-pot multicomponent synthesis of polyfunctionalized 4-aryl-2-cyanoimino-3,4- dihydro-1H-pyrido[2,3-d]pyrimidines

机译:聚官能化4-芳基-2-氰基咪唑-3,4-二氢-1H-吡啶基3,4-二氢-1H-吡啶基[2,3-D]嘧啶的区域选择性和方便的一盆多组分合成

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摘要

A novel series of 5,7-diamino-4-aryl-6-cyano-2-cyanoimino-3,4-dihydro- 1H-pyrido[2,3-d]pyrimidines (aryl-CIDHPPMs) 3a-i was prepared via the one-pot four-component reaction of cyanoguanidine with aromatic aldehydes and malononitrile with molar ratio (1:1:2) using sodium methoxide as catalyst. These new polyfunctionlized aryl- CIDHPPMs were also synthesized by a classical route via reaction of cyanoguanidine with the respective arylidenes of malononitrile dimer under the same condition. In the same manner, the reaction of cyanoguanidine with isatinylidene of malononitrile dimer afforded the new spiro-pyrido[2,3-d]pyrimidines 7. While using aromatic aldehydes having electron donating groups (hydroxyl or dimethylamino groups) gave 4-Amino-2-aryl-6-methoxypyridine-3,5-dicarbonitrile 5a,b.
机译:通过以下制备一种新颖的5,7-二氨基-4-芳基-6-氰基-2-氰基氨基-3,4-二氢-1H-吡啶基(Aryl-CIDHPPMS)3A-I的三氰基-2-氰基-3,4-二羟基-1H-吡啶氨基-3,2-1 使用甲醇钠(1:1:2)用甲醇醛和丙二腈用芳族醛和丙二腈的单盆四组分反应使用甲醇钠作为催化剂。 这些新的多官量化芳基-CIDHPPM也通过氰基多胍与丙酰腈二聚体的相应亚芳基的反应合成了经典的途径。 以相同的方式,氰基与丙二腈二聚体的氰基与异邻二聚体的反应得到了新的螺吡啶[2,3-D]嘧啶7.在使用具有电子提供基团(羟基或二甲基氨基)的芳族醛,得到4-氨基-2 -6-甲氧基吡啶-3,5-二羰基腈5a,b。

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