3-Dimethoxymethyl-2-(N-cyanoimino)thiazolidine 1e reacts with secondary amines to afford 2,4-diamino-s-triazines 4 unexpectedly, while the triazine 5 bearing different amino groups at 2 and 4 positions is selectively obtained by the reaction with a mixture of two kinds of amines.
T. Tanaka, M. Watanabe, Y. Nakamoto, K. Okuno, K. Maekawa and C. Iwata, J. Chem. Soc., Chem. Commun., 1994, 2301 DOI: 10.1039/C39940002301
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