PROCESS FOR PREPARING PYRAZOLES
First Claim
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1. A process for preparing a pyrazole compound of formula V, or a salt, stereoisomer, tautomer or N-oxide thereof
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Abstract
The present invention relates to a process for preparing a pyrazole compound of formula V, the process including cyclizing a hydrazone substituted α,β-unsaturated carbonyl compound of formula IV by reacting it with a suitable reagent, e.g. a reducing agent, an organometallic reagent or a nucleophilic reagent. The compounds of formula V are versatile reaction tools for the preparation of pyrazole derived fine chemicals. The present invention also relates to pyrazole compounds of formulae Va, Vb, Vc, and VI.
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Citations
20 Claims
- 1. A process for preparing a pyrazole compound of formula V, or a salt, stereoisomer, tautomer or N-oxide thereof
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16. A compound of formula Va or a salt, stereoisomer, tautomer or N-oxide thereof
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17. A compound of formula Vc or a salt, stereoisomer, tautomer or N-oxide thereof
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18. A compound of formula IV or a salt, stereoisomer, tautomer or N-oxide thereof
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20. A compound of formula Vb or a salt, stereoisomer, tautomer or N-oxide thereof
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