| 摘要 |
A process for the production of 2-bromo-3-cyano-4,6-diaminopyridine by cyclization of malodinitrile with hydrogen bromide, which comprises reacting malodinitrile in lower aliphatic hydrogenated hydrocarbons with hydrogen bromide used in an excess of 1 to 10% above the stoichiometric amount at temperatures of -10 DEG C. to +30 DEG C.
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