An efficient route for synthesis of 5,6-diphenylimidazo-[2,1-<i>b</i>]thiazoles as antibacterial agents
作者:Zeinab A. Hozien、A. O. Sarhan Abd El-Wareth、Hassan A. H. El-Sherief、Abdalla M. Mahmoud
DOI:10.1002/jhet.5570370443
日期:2000.7
reaction of 1 with aliphatic and/or alicyclic ketones gave the 3-(4,5-diphenyl-2-imidazolylthio)acetone derivatives 5a-d, 2-(4,5-diphenylimidazolylthio)cycloalkanones 8a,d and the tricyclic compounds 9b-c respectively. The cyclized compounds 6a-d and 9a,d were obtained by cyclization of 5a-d and 8a,b respectively. Oxidation of 1 gives the corresponding bis(4,5-diphenyl-2-imidazolyl)-disulfide (10) in
使用酸化乙酸方法使4,5-二苯基咪唑-2-硫酮(1)与芳族酮2a-i反应,以良好的收率得到4,5-二苯基(2-咪唑基硫代)苯乙酮3a-h。而环化产物4i是在1与α-乙酰基萘反应后直接获得的。将化合物3a-h直接环化为相应的3-芳基-5,6-二苯基咪唑并[2,1- b ]噻唑(4a-c)和(4e-h)。以相同的方式,将1与脂族和/或脂环族酮反应,得到3-(4,5-二苯基-2-咪唑基硫基)丙酮衍生物5a-d分别是2-(4,5-二苯基咪唑基硫基)环烷酮8a,d和三环化合物9b-c。分别通过5a-d和8a,b的环化获得环化的化合物6a-d和9a,d。氧化1以90%的收率得到相应的双(4,5-二苯基-2-咪唑基)-二硫化物(10)。测试了一些合成的化合物的抗真菌和抗菌活性。