1-アルキル-ピラゾール-5-カルボン酸エステルIIIの製造方法

Title:

1-アルキル-ピラゾール-5-カルボン酸エステルIIIの製造方法

Document Type and Number:

Japanese Patent JP4725939

Kind Code:

B2

Abstract:

1-Alkyl-pyrazole-5-carboxylic esters are obtained with surprisingly low proportions of 1-alkyl-pyrazole-3-carboxylic esters if a 2,4-diketo ester and/or an enolate thereof is reacted with an alkylhydrazine and/or a corresponding alkylhydrazinium salt, if appropriate, in the presence of a solvent and/or of water, in such a manner that during at least about 90% of the reaction free alkylhydrazine is present.

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Inventors:

Miura, nicolaus
Matsuke, Michael

Application Number:

JP2000566252A

Publication Date:

July 13, 2011

Filing Date:

August 04, 1999

Export Citation:

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Assignee:

LANXESS Deutschland Gamebecher

International Classes:

C07D231/14

Domestic Patent References:

JP10204063A
JP7118238A
JP4224565A
JP56073069A

Attorney, Agent or Firm:

Patent business corporation Odashima patent office

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