Synthesis of substituted 2-amino-5,6-dihydro-4H-1,3-thiazines and 2-iminotetrahydro-1,3-thiazines |
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Authors: | P. L. Ovechkin L. A. Ignatova A. E. Gekhman B. V. Unkovskii |
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Affiliation: | 1. M. V. Lomonosov Moscow Institute of Fine Chemical Technology, USSR
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Abstract: | N-Aryl-N′-(2-methyl-4-hydroxy-2-pentyl)thioureas are cyclized in acidic media to 4,4,6-trimethyl-2-arylimino-5,6-dihydro-4H-1,3-thiazines, the methylation of which with methyl iodide gives 4,4,6-trimethyl-2-methylarylamino-5,6-dihydro-4H-1,3-thiazines. 3,4,4,6-Tetramethyl-2-aryliminotetrahydro-1,3-thiazines were synthesized by cyclization of Naryl-N′-methyl-N′-(2-methyl-4-hydroxy-2-pentyl)thioureas. |
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