5-Nitro-3-(trifluoromethyl)-2-pyridinecarbonitrile → 5-Amino-3-(trifluoromethyl)pyridine-2-carbonitrile

HRID 1257087Notes

Reaction equation

[C:1]([C:3]1[C:8]([C:9]([F:12])([F:11])[F:10])=[CH:7][C:6]([N+:13]([O-])=O)=[CH:5][N:4]=1)#[N:2]>CCOC(C)=O.CC(O)=O.[Fe]>[NH2:13][C:6]1[CH:7]=[C:8]([C:9]([F:12])([F:10])[F:11])[C:3]([C:1]#[N:2])=[N:4][CH:5]=1

Participants

Conditions

Temperature: 65 °C

Procedure

2-cyano-5-nitro-3-trifluoromethylpyridine (7 mg, 0.032 mmol) is dissolved in 1:1 EtOAc/AcOH (1 mL) and heated to 65° C. Iron powder (9 mg, 0.161 μmol, 5 eq, 325 mesh) is added and the mixture stirred for 2 hours. The mixture is filtered through celite, and the filtrate is concentrated under vacuo. The crude residue is purified by flash chromatography on silica gel (hexane/EtOAc) to afford 4 mg (67%) of the desired product.

Workup

filtrationThe mixture is filtered through celite
concentrationthe filtrate is concentrated under vacuo
customThe crude residue is purified by flash chromatography on silica gel (hexane/EtOAc)

Sources & evidence

ORD record: ord-51524c6e575240f690582df517a595e5
Source dataset: uspto-grants-2013_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08461343B2

Reaction notes

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