2-Hydrazinyl-4-(trifluoromethyl)pyridine → 4-Pyridin-3-yl-2-[4-(trifluoromethyl)pyridin-2-yl]-1,2-dihydro-3H-pyrazol-3-one

HRID 889305Notes

Reaction equation

HRID 889305 reaction equation
C(O[C:4](=[O:14])[C:5]([C:8]1[CH:9]=[N:10][CH:11]=[CH:12][CH:13]=1)=[CH:6]O)C.[NH:15]([C:17]1[CH:22]=[C:21]([C:23]([F:26])([F:25])[F:24])[CH:20]=[CH:19][N:18]=1)[NH2:16]>>[N:10]1[CH:11]=[CH:12][CH:13]=[C:8]([C:5]2[C:4](=[O:14])[N:15]([C:17]3[CH:22]=[C:21]([C:23]([F:26])([F:24])[F:25])[CH:20]=[CH:19][N:18]=3)[NH:16][CH:6]=2)[CH:9]=1

Participants

3

Reactant 2

HCID 151507142-Hydrazinyl-4-(trifluoromethyl)pyridineHCID 687080883-Hydroxy-2-pyridin-3-yl-acrylic acid ethyl ester

Product 1

HCID 591869304-Pyridin-3-yl-2-[4-(trifluoromethyl)pyridin-2-yl]-1,2-dihydro-3H-pyrazol-3-one

Procedure

The compound is prepared analogously to Example 2 from 18 mg (0.09 mmol) of the compound from Example 2A and 18 mg (0.10 mmol) 2-hydrazino-4-(trifluoromethyl)pyridine [R. A. Evans, C. Wentrup, J. Chem. Soc. Chem. Commun. 15, 1062-1064 (1992)]. 11.7 mg (41% of th.) of the title compound are obtained as a yellow solid.

Sources & evidence

ORD record
ord-d8dbb2d69bcb45c2b10d15b663880d92
Source dataset
uspto-grants-2012_08
Patent number
US08252817B2

Reaction notes

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