Various 4-amino-2,3-dihydro-4H-triazoles with aromatic, aliphatic and heterocyclic substituents at the C(5) position were synthesized from corresponding esters and thiocarbohydrazide. This method allows the synthesis these heterocycles in a short time and at reduced expenses.
Pyrimidinylthioacrylic acid derivatives useful as herbicides
申请人:NIHON BAYER AGROCHEM K.K.
公开号:EP0571856A1
公开(公告)日:1993-12-01
The present invention relates to novel pyrimidinylthioacrylic acid derivatives of the formula (I)
wherein
R¹represents hydrogen or in each case optionally substituted C₁₋₆ alkyl, C₂₋₄ alkenyl or C₂₋₄ alkynyl,
R²represents hydrogen or optionally substituted C₁₋₆ alkyl, or alkali salts,
R³ and R⁴each independently represent C₁₋₄ alkyl, C₁₋₄ alkoxy, halogeno-C₁₋₄ alkyl, halogeno-C₁₋₄ alkoxy or halogen, and
R⁵represents hydrogen, or in each case optionally substituted C₁₋₆ alkyl, phenyl, C₂₋₄ alkenyl, C₂₋₄ alkynyl, or a heterocyclic ring, or an alkali metal salt, alkali earth metal or organic ammonium salt of pyrimidinylthioacrylic acid derivatives of the formula (I),
to processes for their preparation and their use as herbicides, as well as to novel intermediates and to a process for their preparation.
Herbicidal dimethoxy pyrimidinyloxy-fluorinated acids and salts
申请人:Schering Aktiengesellschaft
公开号:US05270289A1
公开(公告)日:1993-12-14
The invention relates to new substituted .alpha.-pyrimidinyloxy(thio)- and .alpha.-triazinyloxy(thio)carboxylic acid derivatives of general formula I ##STR1## in which A, R.sup.1-3, X and Y have the meanings given in the description, processes for their preparation and their use as herbicides, fungicides and plant growth regulants.