PROCESS FOR THE PREPARATION OF PYRAZOLE DERIVATIVE

Title:

PROCESS FOR THE PREPARATION OF PYRAZOLE DERIVATIVE

Document Type and Number:

WIPO Patent Application WO/1996/019470

Kind Code:

A1

Abstract:

An industrially advantageous process for the preparation of a pyrazole derivative useful as a herbicide capable of dispensing with isomer separation suffering from low yield and preparation of carboxylic acid necessitating complicated steps, which is represented by reaction formula (IV), (V), (VI), wherein R1, R2 and X1 are each independently C1-C4 alkyl; R3 is H or C1-C4 alkyl; X2 is halogen; X3 is diazonium salt or halogen; and n is 0, 1 or 2.

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Inventors:

SAKAMOTO MASASHI (JP)
NASUNO ICHIRO (JP)

Application Number:

PCT/JP1995/002581

Publication Date:

June 27, 1996

Filing Date:

December 15, 1995

Export Citation:

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Assignee:

IDEMITSU KOSAN CO (JP)
SAKAMOTO MASASHI (JP)
NASUNO ICHIRO (JP)

International Classes:

B01J23/44; C07D335/06; C07D409/06; (IPC1-7): C07D335/06; C07D409/06

Domestic Patent References:

WO1994008988A1	1994-04-28
WO1995013275A1	1995-05-18

Foreign References:

JPH03503056A	1991-07-11
JPS56142262A	1981-11-06

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