Pyridine → ethyl 3-methyl-1-(2-pyridyl)-1H-pyrazole-4-carboxylate

HRID 8073

Reaction equation

HRID 8073 reaction equation
[N:1]1[CH:6]=[CH:5][CH:4]=[CH:3][C:2]=1[NH:7][NH2:8].[CH2:9]([O:11][C:12](=[O:19])[CH:13]([CH:17]=O)[C:14](=O)[CH3:15])[CH3:10].N1C=CC=CC=1>C(O)C>[CH2:9]([O:11][C:12]([C:13]1[C:14]([CH3:15])=[N:8][N:7]([C:2]2[CH:3]=[CH:4][CH:5]=[CH:6][N:1]=2)[CH:17]=1)=[O:19])[CH3:10]

Participants

5

Reactant 3

HCID 1049PyridineHCID 786452-HydrazinopyridineHCID 14817199Ethyl 2-formyl-3-oxobutanoate

Product 1

HCID 9877977ethyl 3-methyl-1-(2-pyridyl)-1H-pyrazole-4-carboxylate

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

Similar to Example 1, equimolar amounts of 2-pyridylhydrazine and 2-formyl-3-oxo-butyric acid ethyl ester were combined in a solution of 50% pyridine in ethanol. Analysis showed that the resulting solid was determined to be the named product (m.p. 49° C.–50° C.).

Sources & evidence

ORD record
ord-d784be3dc1194f6b9ccfbea658a1aa5c
Source dataset
uspto-grants-2006_08
Patent number
US07087634B2

Linked notes

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