Some Cyclization Reactions with 2-Ethoxycarbonylmethylidene-4,5-Dihydro-4-Thiazolinone
作者:Y. A. Ammar、Y. A. Mohamed、G. A. M. El-Hagali、A. S. Abd El-Aal、M. S. A. El-Gaby
DOI:10.1080/10426500903061509
日期:2010.6.30
was condensed with bis aromatic aldehydes such as terephthalaldehyde or 4,4′-bisformyl-diphenylether (2a,b) (2:1 molar ratio) and furnished bis-4-thiaozlidinones (3a,b). The reaction of (3a,b) with malononitrile and aromatic aldehydes (1:2:2 molar ratio) gave bis thiazolopyridines (4a–d). Bis-(thiazolopyridine) derivative (6) was obtained by reaction of 4-thiaozlinone (5c) with bis aldehyde (2b) in refluxing
2-Ethoxycarbonylmethylidine-4,5-dihydro-4-thiazolinone (1) 与双芳香醛如对苯二醛或 4,4'-双甲酰基-二苯醚 (2a,b)(2:1 摩尔比)缩合并提供双- 4-噻唑烷酮 (3a,b)。(3a,b) 与丙二腈和芳香醛(1:2:2 摩尔比)的反应得到双噻唑并吡啶(4a-d)。双-(噻唑并吡啶)衍生物(6)通过4-噻唑啉酮(5c)与双醛(2b)在含有哌啶的回流乙醇中反应获得。4-噻唑啉酮 (5a,b) 与不同的 α-氰基肉桂腈环化得到噻唑并 [3,2-a] 吡啶 (7a-d)。化合物9由8与巯基乙酸反应生成,其与对氯苯甲醛反应生成10。化合物10与水合肼缩合得到11。化合物12和16a,