79505-38-7Relevant academic research and scientific papers
Preparation of 1-amino-1,3,5-triazine-2,4(1H, 3H)-diones
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, (2008/06/13)
Herbicidal 1-amino-1,3,5-triazine-2,4(1H, 3H)-diones of the general formula STR1 are obtained in good yields if an N-substituted O-aryl N-chlorocarbonyl carbamate of the general formula STR2 is reacted with an isothiosemicarbazone of the general formula STR3 or hydrohalide thereof, (R1 to R4 in formulae (I) to (III) having the meanings given in the description), at a temperature between 0° and 50° C., in the presence of an acid-binding agent, the open-chain intermediate products formed thereby are then heated (if appropriate without intermediate isolation), in a second stage, to a temperature between 50° and 150° C. and, finally, in a third stage, the 1-alkylideneamino-1,3,5-triazine-2,4(1H, 3H)-dione formed thereby is hydrolyzed (if appropriate again without intermediate isolation) in an acid medium.
