C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/280, 260/315
C07D 231/14 (2006.01) C07D 231/16 (2006.01) C07D 231/18 (2006.01) C07D 231/22 (2006.01) C07D 231/38 (2006.01) C07D 401/04 (2006.01)
Patent
CA 1337528
There is disclosed a process for preparing a pyrazolecarbo- xylic acid derivative represented by the formula (II): Image (II) wherein Y and z each represent a hydrogen atom, a halogen atom, a nitro group, a cyano group, COOR1, NR1R2, CONR1R2, SR1, SO2NR1R2, SO2R3, R3CO, OR4, CHX2 or CX3; A represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a substituted or unsubsti- tuted phenyl group, a substituted or unsubstituted pyridyl group or OR5; where R1 and R2 each represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms; R3 represents an alkyl group having 1 to 10 carbon atoms; R4 represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, a substi- tuted or unsubstituted phenyl group, CHF2, CF3 or CF3CH2; R5 represents an alkyl group having 1 to 10 carbon atoms; and X represents a halogen atom, which comprises oxidizing a pyrazole compound represented by the formula (I): Image (I) wherein Y, Z and A have the same meanings as defined above, with an oxygen-containing gas in the presence of a metal compound catalyst.
604241
Shinke Shuzo
Takigawa Shinichiro
Marks & Clerk
Nissan Chemical Industries Ltd.
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