Title:
IMPROVED METHOD FOR PRODUCING 5-(ALKOXYMETHYL) PYRIDINE-2,3-DICARBOXYLATE SALT
Document Type and Number:
Japanese Patent JP3963499
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain the subject compound in a high degree of purity and a good yield from a 5,6-dicarboxy-3-pyridylmethyl ammonium halide precursor via a single step reaction.
SOLUTION: This compound is obtained by reacting a compound of formula I [Z is H or a halogen; Z1 is H, a halogen, cyano or the like; Y and Y1 are each H, ONa, OK or the like; X is Cl, Br, I or R1SO3 (R1 is a 1-4C alkyl or the like); Q is expressed by formula II (R2 to R4 are each a 1-8C alkyl, or the like), or the like] with an alcohol expressed by the formula: ROH (R is a 1-4C alkyl or phenyl) and a base (e.g. sodium methoxide) in a closed and pressurized system at 120-180°C to form a compound of formula III (M is an alkali metal or an alkaline earth metal). The compound of formula III is useful as an intermediate for synthesizing imidazolinone herbicidal agents.
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Inventors:
Wen-Yu
Application Number:
JP15925996A
Publication Date:
August 22, 2007
Filing Date:
May 31, 1996
Export Citation:
Assignee:
Wyeth Holdings Corporation
International Classes:
C07D213/803; C07D401/04; C07D213/79; (IPC1-7): C07D213/803
Domestic Patent References:
| JP5255257A |
Attorney, Agent or Firm:
Heikichi Odashima
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