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2 083 565

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IPC

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Application

93046787/04, 1993-09-27

(22)

Actual filing date

1993-09-27

(45)

Published

1997-07-10

(72)

Inventor

Mitrokhin A.M.Klimov S.A.Uzakov Eh.Ju.Gordon E.P.Nesterjuk V.A.

(73)

Holder

Tovarishchestvo S Ogranichennoj Otvetstvennost'Ju

PROCESS FOR PREPARING 1-PHENYL-3-METHYL PYRAZOLONE-5 Russian patent published in 1997 - IPC

Abstract RU 2083565 C1

FIELD: synthesis of dyes and drugs. SUBSTANCE: process for preparing 1-phenyl-3-methyl pyrazolone-5. Reagent 1: phenyl hydrazine. Reagent 2: acetoacetic acid alkyl ester. Reaction conditions: 1st stage 40-60 C, aqueous medium 10-30 min. 2nd stage 60-100 C, anhydrous medium, acetic acid catalyst. EFFECT: more efficient preparation process.

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RU 2 083 565 C1

Authors

Mitrokhin A.M.

Klimov S.A.

Uzakov Eh.Ju.

Gordon E.P.

Nesterjuk V.A.

Dates

1997-07-10—Published

1993-09-27—Filed

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