Abstract
4-Chloro-N-[2,2-dichloro-1-(4-methoxyphenyl)-2-phenylethyl]benzenesulfonamide reacted with thiourea on heating in DMF in the presence of sodium carbonate to give 5-(4-methoxyphenyl)-4-phenyl-1,3-thiazole-2-amine. A probable reaction scheme includes cyclization of the initial N-dichloroethyl amide to N-sulfonyl-2,3-diaryl-2-chloroaziridine which undergoes isomerization with opening of the three-membered ring to 1-arylsulfonylamino-2-chloro-2-(4-methoxyphenyl)-1-phenylethene. The subsequent heterocyclization in the reaction with thiourea is accompanied by aromatization via elimination of the arenesulfonamide fragment.
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Original Russian Text © G.N. Rozentsveig, V.Yu. Serykh, K.A. Chernyshev, I.B. Rozentsveig, G.G. Levkovskaya, L.B. Krivdin, 2011, published in Zhurnal Organicheskoi Khimii, 2011, Vol. 47, No. 4, pp. 569–573.
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Rozentsveig, G.N., Serykh, V.Y., Chernyshev, K.A. et al. Cascade synthesis of 2-amino-5-(4-methoxyphenyl)-4-phenyl-1,3-thiazole by reaction of 4-chloro-N-[2,2-dichloro-1-(4-methoxyphenyl)-2-phenylethyl]benzenesulfonamide with thiourea. Russ J Org Chem 47, 572–576 (2011). https://doi.org/10.1134/S1070428011040178
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DOI: https://doi.org/10.1134/S1070428011040178