abstract |
As a method capable of conveniently producing a pyrazolencompound in a high yield, which is useful as a syntheticnintermediate for a pharmaceutical agent such as a therapeuticnagent for diabetes and the like, a production method of ancompound represented by the formula (I)n nwherein n is an integer of 1 to 4 and R 1 is a hydrocarbon groupnoptionally having substituents, or a salt thereof, is provided,nwhich includes reacting a compound represented by the formulan(II)n nwherein Q is a hydroxy group optionally having substituents ornan amino group optionally having substituents, R is anhydrocarbon group optionally having substituents and othernsymbols are as defined above, or a salt thereof, withnhydrazine or a salt thereof. |