C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/248.6
C07D 253/06 (2006.01) C07D 253/075 (2006.01)
Patent
CA 1221695
23189-5846 Process for preparing 3,4,6-trisubstituted 3-alkylthio- 1,2,4-triazin-5-one derivatives A b s t r a c t The Largely known, herbicidally active 3,4,6- trisubstituted 3-alkylthio-1,2,4-triazin-5-one derivatives of the formula (I) Image (I) in which R1 represents alkyl, alkenyl, alkinyl, option- ally substituted cycloalkyl or optionally sub- stituted aralkyl, R2 represents amino, alkylamino or alkyl and R3 represents alkyl, halogenoalkyl, alkoxyalkyl, optionally substituted cycloalkyl, optionally sub- stituted aryl or optionally substituted aralkyl, are obtained in high yield and purity even on an indus- trial scale by alkylating the corresponding 3-mercapto- 1,2,4-triazin-5-one derivatives at a temperature from -20°C - +180°C, in the presence of an at least equimolar amount of a strong oxygen-containing acid, with oxygen acid esters which may also be produced in situ. Le A 22 663 - Foreign countries
466907
Aktiengesellschaft Bayer
Fetherstonhaugh & Co.
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