The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 5-Methyl-1-propyl-1H-pyrazole-4-carbaldehyde( cas:890652-02-5 ) is researched.Safety of 5-Methyl-1-propyl-1H-pyrazole-4-carbaldehyde.Attaryan, O. S.; Sahakyan, A. A.; Tamazyan, R. A.; Ayvazyan, A. G.; Asratyan, G. V. published the article 《Synthesis, structure, and properties of pyrazole-4-carbaldehyde oximes》 about this compound( cas:890652-02-5 ) in Russian Journal of General Chemistry. Keywords: pyrazolecarbaldehyde hydroxylamine stereoselective oximation; oxime pyrazolecarbaldehyde preparation mol crystal structure acetic anhydride dehydration; cyano pyrazole preparation. Let’s learn more about this compound (cas:890652-02-5).
1-Alkyl-1H-pyrazole-4-carbaldehyde oximes (preparation shown) reacted with acetic anhydride to give the corresponding nitriles, which is typical for anti isomers of aldoximes. The anti configuration of 5-methyl-1-propyl-1H-pyrazole-4-carbaldehyde oxime (I) in crystal was unambiguously determined by X-ray anal.
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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method