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CAPLUS COPYRIGHT 2013 ACS
|Patent Number: ||US 8338596 |
|Title: ||Process for the preparation of 5-substituted-8-alkoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-amines |
|Inventor(s): ||Bott, Craig; Hamilton, Christopher; Roth, Gary |
|Patent Assignee(s): ||Dow Agrosciences LLC, USA |
|Source: ||PCT Int. Appl., 21pp. CODEN: PIXXD2 |
|Language: ||English |
5-Substituted-8-alkoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-amines (I, wherein X is halo or OR; and R is C1-4 alkyl) are manufactured from 2-substituted-4-amino-5-methoxypyrimidines via formation and cyclization of a ((pyrimidinylamino)hydroxyimino)methylcarbamate in a process that avoids hydrazine and cyanogen halide.
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