A convenient method for the synthesis of 2-[(5-benzyl-1,3-thiazol-2-yl)imino]-1,3-thiazolidin-4-one derivatives
作者:Yuri V. Ostapiuk、Mykola D. Obushak、Vasyl S. Matiychuk、Marek Naskrent、Andrzej K. Gzella
DOI:10.1016/j.tetlet.2011.11.093
日期:2012.2
It was found that the reaction of 2-chloroacetamido/chloropropioamido-5-benzylthiazole with potassium thiocyanate gave, via rearrangement, 2-[(5-benzyl-1,3-thiazol-2-yl)imino]-1,3-thiazolidin-4-ones.
Reaction of (Cyano)thioacetamide with Arylhydrazones of<i>β</i>-Diketones: Novel Synthesis of 2(1<i>H</i>)-Pyridinethiones, Thieno[2,3-<i>b</i>]pyridines, and Pyrazolo[3,4-<i>b</i>]pyridines
作者:Galal Eldin Hamza Elgemeie、Ali Mahmoud El-Zanate、Abdel-Kader E. Mansour
DOI:10.1246/bcsj.66.555
日期:1993.2
A novel synthesis of 2(1H)-pyridinethiones, thieno[2,3-b]pyridines and pyrazolo[3,4-b]pyridines utilizing (cyano)thioacetamide and arylhydrazones of 1,3-diketones as starting components is described.
Derivatization of Coumarins at the Benzenoid Ring in Aqueous Medium
作者:Sankar C Bhunia、Sutanuka Pal、Gopal C Patra、Sudhir C Pal
DOI:10.1002/jhet.1800
日期:2014.11
prepared from coumarin, 7‐methylcoumarin, and 3,4‐benzocoumarin. The Reimer–Tiemann reaction, Lederer–Manasse reaction, bromination using molecular bromine as well as 2,4,4,6‐tetrabromocyclohex‐2,5‐dien‐1‐one, Elbs reaction, and diazocoupling have been carried under controlled conditions to obtain various derivatives. Further, several reactions of aldehyde derivatives of these coumarins have been carried
A new type of antiallergic agent, 9-hydrazono-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-ones, was synthesized and evaluated for inhibitory effects in the rat reagenic passive cutaneous anaphylaxis (PCA) screen. Several racemic 6-methyl derivatives were found to be more potent than disodium chromoglycate intravenously and some were also active orally. Structure-activity relationships are discussed
合成了一种新型的抗过敏药9-肼基-6,7,8,9-四氢-4H-吡啶并[1,2-a]嘧啶-4-酮,并评估了其对大鼠自发性被动皮肤的抑制作用。过敏反应(PCA)屏幕。已发现几种消旋的6-甲基衍生物在静脉内比色甘氨酸二钠更有效,有些还具有口服活性。讨论了构效关系。在具有6S和6R绝对构型的对映异构体之间的6-甲基系列中观察到高立体特异性,前者更具活性。化合物17,(+)-6(S)-甲基-9-(苯肼基)-4-氧代-4H-吡啶并[1,2-a]嘧啶-3-羧酸[Chinoin-1045; [UCB L140],ED50值为1.0 mumol / kg po,目前正在临床研究中。
Flow synthesis of ethyl isocyanoacetate enabling the telescoped synthesis of 1,2,4-triazoles and pyrrolo-[1,2-c]pyrimidines
作者:Marcus Baumann、Antonio M. Rodriguez Garcia、Ian R. Baxendale
DOI:10.1039/c5ob00245a
日期:——
The efficient flow synthesis of important heterocyclic building blocks based on the 1,2,4-triazole and pyrrolo[1,2-c]pyrimidine scaffold has been achieved.