| abstract |
New are the tri- and disubstituted 1,2,4-triazin-3,5-diones and the disubstituted 3-thioxo-1,2,4-triazin-5- ones of the formulas (I), (Ila) and (IVa ) which have the meanings given in the description, the use of (I) as fungicides, of (Ila) and (IVa) as starting compounds for the preparation of highly active compounds.n n n The compounds are generally defined by the formulas (I), (Ila) and (IVa) and can all be prepared by analogy processes, e.g. by reacting suitable disubstituted compounds with alkylating agents: the disubstituted diones are prepared from suitable thioxodions with suitable desulfurizing agents and the thioxodions from suitable α-ketocarboxylic acids with suitable semicarbazides. |