C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 487/04 (2006.01) A01N 43/90 (2006.01)
Patent
CA 2153246
5-Alkoxy(1,2,4)triazolo(1,5-c)pyrimidine-2(3H)-thione compounds (I), such as 5- ethoxy-8-fluoro(1,2,4)triazolo(1,5-c)pyrimidine-2(3H)-thione, were prepared by treatment of a 5-alkoxy-1,2,4-triazolo(4,3-c)-pyrimidine-3(2H)-thione compound (II), such as 5-ethoxy-8-fluoro-1,2,4-triazolo-(4,3-c)pyrimidine-3(2H)-thione, with an alkali metal alkoxide in an alcohol solvent slected so that the 5- alkoxy group, the alkoxide, and the alcohol all have the same alkyl group. The trialkylammonium salts of the 5-alkoxy-1,2,4-triazolo(4,3-c)-pyrimidine-3(2H)- thione compounds were converted to 3-hydrocarbylthio-5-alkoxy-1,2-4- triazolo(4,3-c)pyrimidine compounds by reaction with a hydrocarbyl halide, such as benzyl chloride. The products are useful intermediates in the preparation of 5-alkoxy(1,2,4)triazolo(1,5-c)pyrimidine-2-sulfonamide herbicides.
Cette invention se rapporte à des composés 5-alcoxy(1,2,4)triazolo(1,5-c)pyrimidine-2(3H)-thione (I), tels que 5-éthoxy-8-fluoro(1,2,4)triazolo(1,5-c)pyrimidine-2(3H)-thione, qu'on a préparés en traitant un composé 5-alcoxy-1,2,4-triazolo(4,3-c)-pyrimidine-3(2H)-thione (II) tel que 5-éthoxy-8-fluoro-1,2,4-triazolo-(4,3-c)pyrimidine-3(2H)-thione, avec un alcoxyde de métal alcalin dans un solvant à base d'alcool choisi pour que le groupe 5-alcoxy, l'alcoxyde et l'alcool aient tous le même groupe alkyle. Les sels trialkylammonium des composés 5-alcoxy-1,2,4-triazolo(4,3-c)-pyrimidine-3(2H)-thione ont été convertis en composés 3-hydrocarbylthio-5-alcoxy-1,2,4-triazolo(4,3c)pyrimidine, par réaction avec un halogénure hydrocarbyle, tel que du chlorure du benzyle. Ces produits sont utiles comme intermédiaires dans la préparation d'herbicides à base de 5-alcoxy(1,2,4)triazolo(1,5-c)pyrimidine-2-sulfonamide.
Orvik Jon A.
Shiang Dawn L.
Dow Agrosciences Llc
Dowelanco
Smart & Biggar
LandOfFree
5-alkoxy-1,2,4-triazolo[4,3-c]pyrimidine-3(2h)-thione... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with 5-alkoxy-1,2,4-triazolo[4,3-c]pyrimidine-3(2h)-thione..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 5-alkoxy-1,2,4-triazolo[4,3-c]pyrimidine-3(2h)-thione... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1531394