Abstract
2,4-Dimethyl[1,2,4]triazolo[1,5-a]benzimidazole reacted with bromine to give 7-bromo derivative through the corresponding stable perbromide. Cyclization of quaternary 1,2-diamino-3-R-benzimidazolium salts with chloroacetyl chloride in boiling xylene afforded 2-chloromethyl-4-R-[1,2,4]triazolo[1,5-a]benzimidazoles [R = Me, ArOCH2CH2, ArC(O)CH2] which readily underwent exchange reactions with nitrogen-, oxygen-, and sulfur-centered nucleophiles and Wittig reaction with formation of 2-vinyl derivatives.
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Original Russian Text © T.A. Kuz’menko, L.N. Divaeva, A.S. Morkovnik, 2015, published in Zhurnal Organicheskoi Khimii, 2015, Vol. 51, No. 10, pp. 1504–1509.
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Kuz’menko, T.A., Divaeva, L.N. & Morkovnik, A.S. 4-substituted 2-chloromethyl[1,2,4]triazolo[1,5-a]benzimidazoles and their transformations. Russ J Org Chem 51, 1474–1480 (2015). https://doi.org/10.1134/S1070428015100218
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DOI: https://doi.org/10.1134/S1070428015100218