Synthesis of Terminal Thiazoles from <i>N</i>-Protected Amino Acids and a Study of Their Antibacterial Activities
作者:H. S. Lalithamba、K. Uma、T. S. Gowthami、G. Nagendra
DOI:10.1080/00304948.2020.1721959
日期:2020.5.3
located thiazole derivatives. Several methods for the synthesis of thiazoles have been reported as follows: (i) thiazolecontaining amino acids were synthesized by condensation-cyclization, (ii) Ling and his group prepared 1,2,4-triazole-linked thiazole derivatives from the reaction of a-bromo substituted acetophenones and thiourea, (iii) Wardakhan and his co-workers synthesized several thiazole derivatives
噻唑在有机化学领域具有特殊意义。氨基酸衍生的噻唑在生物活性物质(如硫肽抗生素)中包含一个共同的基序。因此,噻唑的制备和反应对于药物和精细化学品的合成具有重要意义。报道了从磺酰叠氮化物、末端炔烃和硫羰酯通过消除磺酰基制备 2,5-二取代噻唑的顺序程序。氨基硫脲衍生物产生噻唑的环化反应也已被探索。特别是,我们可以注意到 4-取代苯腈和 L-半胱氨酸的环化反应生成了噻唑酯,然后用选定的醇酯化和由 BrCCl3/DBU 介导的噻唑啉酯的氧化。在室温下通过金催化氧化有效地制备了噻唑及其衍生物。此外,11-溴-10-氧代十一烷酸与乙酰胺和硫脲反应生成位于末端的噻唑衍生物。已经报道了几种合成噻唑的方法如下:(i)通过缩合环化合成含噻唑的氨基酸,(ii)Ling 和他的团队从 a 的反应制备了 1,2,4-三唑连接的噻唑衍生物。 -溴取代的苯乙酮和硫脲,(iii) Wardakhan 和他的同事从哒嗪-3-肼酸合成了几种噻唑衍生物,以及