Synthesis of novel pyrido[3′,2′:4,5]thieno[3,2-<i>d</i>]pyrimidines, pyrido[3″,2″:4′,5′]thieno[3′,2′:4,5]pyrimido[l,6-<i>a</i>]benzimidazoles and related fused systems
作者:E. A. Bakhite、A. G. Al-Sehemi、Y. Yamada
DOI:10.1002/jhet.5570420606
日期:2005.9
chloroacetyl chloride led to the formation of a next key compound, ethyl 2-chloromethyl-4-oxo-3,4-dihydropyrido[3′,2′:4,5]thieno[3,2-d]pyrimidine-8-carboxylate 9. Also, 3-amino-2-benzimidazolylthieno[2,3-b]pyridine-5-carboxylate 5 and 2-(3′-aminothieno [2,3-b]pyridin-2′-yl)-4-oxo-3,4-dihydropyrido[3′,2′:4,5]thieno[3,2-d]pyrimidine-8-carboxylate 17 were prepared from 1c. The compounds 5, 9 and 17 were used as
由4-芳基-3-氰基-6-甲基-2-硫代-乙基-乙基制备3-氨基-4-芳基-5-乙氧基羰基-6-甲基噻吩并[2,3- b ]吡啶-2-羧酰胺3a-c。 1,2-二氢吡啶-5-羰基化物1a-c与一些羰基化合物反应,分别得到四氢吡啶并噻吩并嘧啶衍生物6a-c,7a-c和8a-c。用氯乙酰氯处理化合物3c导致形成下一个关键化合物乙基2-氯甲基-4-氧代-3,4-二氢吡啶并[3',2':4,5]噻吩并[3,2- d ]嘧啶-8-羧酸盐9。另外,3-氨基-2-苯并咪唑基噻吩并[2,3 - b ]吡啶-5-羧酸酯5和2-(3'-氨基噻吩并[2,3- b ]吡啶-2'-基)-4-氧代-3,4-二氢吡啶并[3',2':4,5]噻吩并[3,2- d由1c制备嘧啶-8-羧酸盐17 。化合物5,9和17被用作良好的合成子为其他pyridothienopyrimidines和pyridothienopyrimid