Abstract
3-Chloro-2-chlorocarbonylbenzo[b]thiophenes were obtained on oxidation of Meerwein reaction products, viz. 3-aryl-2-halopropionic acids and their esters, with thionyl chloride in the presence of N-benzyl-N-methylmorpholinium chloride. Disubstituted thioureas were synthesized by the reaction of these compounds with ammonium thiocyanate and aromatic amines, and were cyclized by interaction with iodoacetic acid with the formation of 4-thiazolidinone derivatives. The same cyclization in the presence of aromatic aldehydes leads to the formation of the corresponding 5-arylidene-substituted 4-thiazolidinones.
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Obushak, N.D., Matiichuk, V.S. & Martyak, R.L. Synthesis of Heterocycles from the Products of Anionic Arylation of Unsaturated Compounds. 7. Products of Haloarylation of Acrylic Acid and Its Esters in the Synthesis of Benzo[b]thiophene Derivatives. Chemistry of Heterocyclic Compounds 39, 878–884 (2003). https://doi.org/10.1023/A:1026190103546
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DOI: https://doi.org/10.1023/A:1026190103546