Abstract
The cyclization of sulfonamide derivatives of alkylated 2-hydroxyphenylthioureas in the presence of an ammoniacal solution of silver oxide gives 2-alkylaminobenzoxazole-5-sulfonamides or the corresponding 3-alkyl-2-alkyliminobenzoxazolines. Alkyl-substituted 2-aminobenzoxazole-5-sulfonamides were also obtained by the reaction of benzoxazolylthione with secondary amines and aniline.
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K. Davidkov and D. Simov, Compt. Rend. Bulg. Acad. Sci., 1, 21, 1193, 1968.
R. D. Desai and R. F. Hunter, J. Chem. Soc., 1186 (1934).
D. Simov, B. Galabov, and K. Davidkov, Zh. Prirodn. Soedin., 15, 339 (1971).
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 173–174, February, 1976.
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Simov, D., Davidkov, K. Synthesis of 2-aminobenzoxazoles and 2-iminobenzoxazolines. Chem Heterocycl Compd 12, 151–152 (1976). https://doi.org/10.1007/BF00523956
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DOI: https://doi.org/10.1007/BF00523956