Synthesis and Identification of some new Derivatives Oxazole, Thiazole and Imidazol from Acetyl Cysteine | ||||
| Egyptian Journal of Chemistry | ||||
| Article 71, Volume 64, Issue 12, December 2021, Page 7565-7571 PDF (364.68 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejchem.2021.88755.4267 | ||||
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| Authors | ||||
ghufran thanoon sdeek 1; Ruwa M. Mauf2; Mohanad Yakdhan Saleh  3
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| 1department of chemistry, college of pure science | ||||
| 2Department of Chemistry , College of Education of Girl, University of Mosul | ||||
| 3Department of Chemistry, College of Education for pure science, University of Mosul | ||||
| Abstract | ||||
| Some fused heterocyclic oxazoles and imidazols rings were synthesized from reaction of N- acetyl cysteine with different treatment. After thiol group protection, N-acetyl-S-ethyl cysteine (2) had been esterified to give ester 3 which cyclized to oxazole 4 with phosphorus oxychloride. N-acetyl-S-ethyl cysteine 2 were converted to acid chloride 5 with thionyle chloride. Amide 6 were synthesized from 5 with ammonia solution. Amide 6 converted to substituted carbamide 7 by react with P2S5, then the product reacted with α-chloroacetophenone to give substituted thiazol ring 8 that converted to bicyclic thiazole – imidazole ring system 9. Cyclized benzoxazole derivative 10 had been synthesized then converted to 3-(ethylthio)-1-methyl-1,3a-dihydrobenzo[d]imidazo[5,1-b]oxazole (11). Structure of new synthesized compounds were confirms by IR ,1H-NMR, and UV spectra as well as physical constant. | ||||
| Keywords | ||||
| heterocyclic compounds; oxazole; thiazole; Imidazole; protective thiol group | ||||
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