2-(1-Methylhydrazinyl)-3-(trifluoromethyl)pyridine → HCID 53949563, compound

HRID 1106708Notes

Reaction equation

[Cl:1][C:2]1[N:6]([C:7]2[CH:14]=[CH:13][CH:12]=[CH:11][C:8]=2[CH:9]=O)[C:5](=[O:15])[N:4]([CH3:16])[N:3]=1.[F:17][C:18]([F:29])([F:28])[C:19]1[C:20]([N:25]([CH3:27])[NH2:26])=[N:21][CH:22]=[CH:23][CH:24]=1>C(O)C.C(O)(=O)C.C(=O)(O)[O-].[Na+]>[Cl:1][C:2]1[N:6]([C:7]2[CH:14]=[CH:13][CH:12]=[CH:11][C:8]=2[CH:9]=[N:26][N:25]([CH3:27])[C:20]2[C:19]([C:18]([F:29])([F:28])[F:17])=[CH:24][CH:23]=[CH:22][N:21]=2)[C:5](=[O:15])[N:4]([CH3:16])[N:3]=1

Participants

Conditions

Temperature: 50 °C

Procedure

The title compound of Step A (0.20 g, 0.80 mmol) was dissolved in absolute ethanol (7 mL) and a solution of 1-[3-(trifluoromethyl)pyridin-2-yl]-1-methylhydrazine in ethanol (3 mL) was added followed by 3 drops of glacial acetic acid. The mixture was warmed to 50° C. for 1 h, cooled to room temperature and then diluted with aqueous sodium bicarbonate and extracted three times with ethyl acetate. The combined organic phases were dried (MgSO4), filtered and concentrated to give 0.38 g of the title compound of Step B as a yellow solid. 1H NMR (300 MHz. CDCl3): δ 8.42 (d.1H. J=5 Hz), 8.16 (d,1H, J=8 Hz), 8.01 (d,1H, J=8 Hz), 7.51 (t,1H, J=8 Hz), 7.42 (t,1H), J=8 Hz), 7.35 (s,1H), 7.21 (d,1H, J=8 Hz), 7.03 (dd,1H, J=8, 5 Hz), 3.56 (s,6H).

Workup

temperaturecooled to room temperature
extractionextracted three times with ethyl acetate
dry with materialThe combined organic phases were dried (MgSO4)
filtrationfiltered
concentrationconcentrated

Sources & evidence

ORD record: ord-0a5a06c4bc3c411dbd7bff557fa6592a
Source dataset: uspto-grants-2000_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06057352

Reaction notes

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