Design, synthesis, characterization, and docking studies of hiherto unkown chlorinated thiazolidine, thiophene, and 2-iminochromene derivatives as protein-like protease inhibitors
Mohamed A. M. Abdel Reheim, Gameel A. M. Elhagali, Khadija E. Saadon, Nadia M. H. Taha, N. A. Mahmoud, Mohamed. S. A. El-Gaby
{"title":"Design, synthesis, characterization, and docking studies of hiherto unkown chlorinated thiazolidine, thiophene, and 2-iminochromene derivatives as protein-like protease inhibitors","authors":"Mohamed A. M. Abdel Reheim, Gameel A. M. Elhagali, Khadija E. Saadon, Nadia M. H. Taha, N. A. Mahmoud, Mohamed. S. A. El-Gaby","doi":"10.1007/s13738-024-03056-0","DOIUrl":null,"url":null,"abstract":"<div><p>The present work details the synthesis of several intriguing nitrogenous heterocycles utilizing a cyano-<i>N</i>-aryl-acetamide-reagent, notably chlorinated thiazolidine, thiophene and 2-iminochromene derivatives. Thus, the precursor 2-cyano-<i>N</i>-(2,4-dichlorophenyl) acetamide <b>1</b> underwent the reaction with phenyl isothiocyanate in DMF/KOH to afford the intermediate salt <b>3,</b> which reacted in situ with several α-halogenated reagents <b>4a-c</b> like ethylchloroacetate,α-bromoethylpropionate and α-bromo ethyl butaneoate and afforded the corresponding 4-thiazolidinnone derivatives <b>(6a–c,</b> yield%; 67–85), thiophene derivatives (<b>11</b>;yield 80%<b>)</b> and (<b>15,</b> yield 77%) obtained from the reaction of <b>3</b> with α- chloroacetyl acetone <b>9</b> and ethyl 2-chloro-3-oxobutanoate <b>12</b>.Novel series of different 4-thiazolidinones<b>(16a–e; </b>yield%; 65–84<b>)</b> were obtained via condensation of <b>6a</b> with different aldehydes. Finally, the reaction of compound <b>1 </b>with different bifunctional reagents, such as salicylaldehyde derivatives and 2-hydroxynaphthaldehyde, in ethanol furnished the iminochromenes <b>(17a,b;</b> yield %77,80) and (<b>18;</b> yield 85%). In addition, molecular docking studies of the prepared molecules were carried out against papain-like protease (PLpro) to identify novel promising inhibitors of Coronavirus Disease COVID-19. The binding affinity of the best docked compounds <b>16c</b> and <b>16a</b> toward the target enzyme was − 9.6 and − 8.9 kcal/mole, respectively. In silico-docking-Studies indicate, that compounds <b>16c</b> and <b>16a</b> have the potential as antiviral against COVID-19.</p><h3>Graphical abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":676,"journal":{"name":"Journal of the Iranian Chemical Society","volume":null,"pages":null},"PeriodicalIF":2.2000,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the Iranian Chemical Society","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s13738-024-03056-0","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The present work details the synthesis of several intriguing nitrogenous heterocycles utilizing a cyano-N-aryl-acetamide-reagent, notably chlorinated thiazolidine, thiophene and 2-iminochromene derivatives. Thus, the precursor 2-cyano-N-(2,4-dichlorophenyl) acetamide 1 underwent the reaction with phenyl isothiocyanate in DMF/KOH to afford the intermediate salt 3, which reacted in situ with several α-halogenated reagents 4a-c like ethylchloroacetate,α-bromoethylpropionate and α-bromo ethyl butaneoate and afforded the corresponding 4-thiazolidinnone derivatives (6a–c, yield%; 67–85), thiophene derivatives (11;yield 80%) and (15, yield 77%) obtained from the reaction of 3 with α- chloroacetyl acetone 9 and ethyl 2-chloro-3-oxobutanoate 12.Novel series of different 4-thiazolidinones(16a–e; yield%; 65–84) were obtained via condensation of 6a with different aldehydes. Finally, the reaction of compound 1 with different bifunctional reagents, such as salicylaldehyde derivatives and 2-hydroxynaphthaldehyde, in ethanol furnished the iminochromenes (17a,b; yield %77,80) and (18; yield 85%). In addition, molecular docking studies of the prepared molecules were carried out against papain-like protease (PLpro) to identify novel promising inhibitors of Coronavirus Disease COVID-19. The binding affinity of the best docked compounds 16c and 16a toward the target enzyme was − 9.6 and − 8.9 kcal/mole, respectively. In silico-docking-Studies indicate, that compounds 16c and 16a have the potential as antiviral against COVID-19.
期刊介绍:
JICS is an international journal covering general fields of chemistry. JICS welcomes high quality original papers in English dealing with experimental, theoretical and applied research related to all branches of chemistry. These include the fields of analytical, inorganic, organic and physical chemistry as well as the chemical biology area. Review articles discussing specific areas of chemistry of current chemical or biological importance are also published. JICS ensures visibility of your research results to a worldwide audience in science. You are kindly invited to submit your manuscript to the Editor-in-Chief or Regional Editor. All contributions in the form of original papers or short communications will be peer reviewed and published free of charge after acceptance.