(2H) 5- alkoxy 1,2,4-triazolo 4,3-c pyrimidine-3 - and thione compounds, 5-alkoxy 1,2,4 triazolo 1,5-c pyrimidin-2 and their use in the production of 3-5-hydrocarbylthio alkoxy 1,2,4-triazolo 4,3-c pyrimidine and thione - (3H)

摘要

(2H) (57) [summary] 5-alkoxy 1,2,4-triazolo (4,3-c) pyrimidine-3 - thione compounds (eg 11), 5-ethoxy-8-fluoro-1, 2 is treated with an alkali metal alkoxide in an alcohol solvent selected all 5-alkoxy groups, and alcohol to alkoxide have the same alkyl group, a thione - (4,3-c) pyrimidine--3 (2H) 4- triazolo By, 5-alkoxy (1,2,4) triazolo (1,5-c) pyrimidine -2 (3H) - for example thione compound (I), 5- ethoxy-8-fluoro-(1,2,4) triazolo I was prepared thione - (3H) (1,5-c) pyrimidin-2. 5-alkoxy-1,2,4-triazolo (4,3-c) pyrimidine--3 (2H) - by reaction with hydrocarbyl halides such as benzyl chloride trialkyl ammonium salt of a thione compound, 3-hydrocarbylthio -5 - to be converted to an alkoxy 1,2,4 triazolo (4,3-c) pyrimidine compounds. Products are useful as intermediates in the preparation of 5-alkoxy (1,2,4) triazolo (1,5-c) pyrimidine-2-sulfonamide herbicide.