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A Direct Synthesis for a New Series of 2‐Oxo(thioxo)nicotinonitrile Nucleosides as Antimicrobial Agents
Journal of Heterocyclic Chemistry ( IF 2.0 ) Pub Date : 2018-11-26 , DOI: 10.1002/jhet.3394
Hassan A. El‐Sayed 1 , Alaa El‐Din M. M. El‐Torky 1 , Ahmed H. Moustafa 1
Affiliation  

A facile synthesis of a new series of cyclic and acyclic nucleosides of polyfunctionalized 2‐oxo(thioxo)nicotinonitrile derivatives 1 and 2 was performed. Glycosylation of 2‐pyridone 1 and 2‐thiopyridone 2 with glycosyl/galactosyl bromides in the existence of KOH afforded the N‐nucleoside and S‐nucleoside analogues 3, 5, 7, and 9, respectively. Deacetylation of nucleosides 3, 5, 7, and 9 gave the deacetylated nucleosides 4, 6, 8, and 10, respectively. Alkylation of 2‐pyridone 1 with glycone analogues [namely, 4‐bromobutyl acetate, (2‐acetoxyethoxy)methyl bromide, 3‐chloropropane‐1,2‐diol, and allyl and / propargyl bromides] in the existence of K2CO3 afforded the corresponding O‐acyclic nucleoside analogues 11, 13, and 15–17, respectively. Finally, treating of compounds 11 and 13 with a small amount of Et3N tolerated the 6‐hydroxy deacetylated derivatives 12 and 14, respectively. The synthesized nucleosides and alkylated products were tested against Gram (+ve) (Staphylococcus aureus and Bacillus cereus) and (Pseudomonas aeruginosa and Escherichia coli) as Gram (−ve) and Fungi (Aspergillus flavus and Aspergillus niger) and showed moderate antibacterial and antifungal activity.

中文翻译:

直接合成新系列的2-Oxo(thioxo)烟碱腈核苷作为抗菌剂

轻松合成了多官能化的2-氧代(硫代)烟碱腈衍生物12的一系列新的环状和无环核苷。2-吡啶酮的糖基化1和2-硫代吡啶酮2与糖基/半乳糖基溴化物在KOH的存在提供的Ñ核苷和š核苷类似物357,和9分别。核苷的脱乙酰357,和9,得到脱乙酰化的核苷46分别为810。在存在K 2 CO 3的情况下,将2-吡啶酮1与甘氨酸类似物[即,乙酸4-溴丁酯,(2-乙酰氧基乙氧基)甲基溴,3-氯丙烷-1,2-二醇,烯丙基和/或炔丙基溴]进行烷基化。得到相应的ø -acyclic核苷类似物1113,和15-17分别。最后,用少量Et 3 N处理化合物1113可以耐受6-羟基脱乙酰基衍生物1214, 分别。测试了合成的核苷和烷基化产物对革兰氏(-ve)和真菌(黄曲霉黑曲霉)的革兰氏(+ ve)(金黄色葡萄球菌蜡状芽孢杆菌)和(铜绿假单胞菌和大肠杆菌)和革兰氏(-ve)和真菌的作用,并显示了中等程度的抗菌和抗真菌作用活动。
更新日期:2018-11-26
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