| 摘要 |
<p>1282585 Process for 2,4-diamino-6-alkylthios-triazines J R GEIGY AG and AGRIPAT SA 24 July 1969 [25 July 1968] 37191/69 Heading C2C The invention comprises a process for making herbidical I where R 1 , R 2 , R 3 and R 4 are H or C 1-4 alkyl and R 5 is C 1-4 alkyl by reacting a corresponding 2,4- diamino-6-chloro-s-triazine in an aqueous medium with an appropriate alkali metal alkylmercaptide optionally in the presence of emulsifying agents; the reaction is carried out, at least toward the end thereof, at from 120 to 220‹ C., within which temperature range the end products form a liquid phase, and under pressures which correspond to said temperatures in a given closed reaction system.</p> |
