A new and efficient process for the preparation of...

C - Chemistry – Metallurgy – 07 – D

Patent

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C07D 253/075 (2006.01)

Patent

CA 2366521

1. A process for the manufacture of 3,5-diamino-6-substituted-1,2,4-triazines is disclosed which comprises the steps of: (a) reacting a compound of formula (II): (see formula II) with aminoguanidine salts, (b) dehydrating the compound obtained to form a compound of formula IV, (see formula IV) and (c) cyclization of the compound of formula IV into a 3,5-diamino-6- substituted-1,2,4-triazine compound of formula I or into a hydrated form thereof.

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