Dimethylformamide → 3-(4-(3-Chloro-2-(trifluoromethyl)phenyl)piperidine-1-carbonyl)-[1,2,4]triazolo[4,3-a]pyridine-6-carbonitrile

HRID 58503Notes

Reaction equation

HRID 58503 reaction equation
Br[C:2]1[CH:3]=[CH:4][C:5]2[N:6]([C:8]([C:11]([N:13]3[CH2:18][CH2:17][CH:16]([C:19]4[CH:24]=[CH:23][CH:22]=[C:21]([Cl:25])[C:20]=4[C:26]([F:29])([F:28])[F:27])[CH2:15][CH2:14]3)=[O:12])=[N:9][N:10]=2)[CH:7]=1.[CH3:30][N:31](C=O)C>O.[C-]#N.[Zn+2].[C-]#N.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[Pd]>[Cl:25][C:21]1[C:20]([C:26]([F:29])([F:28])[F:27])=[C:19]([CH:16]2[CH2:17][CH2:18][N:13]([C:11]([C:8]3[N:6]4[CH:7]=[C:2]([C:30]#[N:31])[CH:3]=[CH:4][C:5]4=[N:10][N:9]=3)=[O:12])[CH2:14][CH2:15]2)[CH:24]=[CH:23][CH:22]=1

Participants

6

Reactant 2

HCID 6228DimethylformamideHCID 118483535HCID 118483535, compound

Product 1

HCID 1184834323-(4-(3-Chloro-2-(trifluoromethyl)phenyl)piperidine-1-carbonyl)-[1,2,4]triazolo[4,3-a]pyridine-6-carbonitrileYield 38%

Reagents, catalysts & solvents 3

HCID 11186Zinc cyanide (Zn(CN)2)CatalystHCID 11979704Tetrakis(triphenylphosphine)palladiumCatalystHCID 962WaterSolvent

Conditions

Temperature
130 °C

Procedure

A mixture of (6-bromo-[1,2,4]triazolo[4,3-a]pyridin-3-yl)(4-(3-chloro-2-(trifluoromethyl)phenyl)piperidin-1-yl)methanone (0.076 g, 0.156 mmol), zinc cyanide (0.037 g, 0.312 mmol), palladium tetrakis(triphenylphosphine) (0.018 g, 0.0156 mmol), and DMF (2 mL) was heated under microwave irradiation at 130° C. for 30 min. After cooling to ambient temperature, the mixture was diluted with water (50 mL) and extracted with ethyl acetate (50 mL). The extract was washed with brine (2×50 mL), dried over Na2SO4, filtered, and concentrated under reduced pressure. The resulting residue was chromatographed over silica gel (0-60% EtOAc in hexanes) to give 3-(4-(3-chloro-2-(trifluoromethyl)phenyl)piperidine-1-carbonyl)-[1,2,4]triazolo[4,3-a]pyridine-6-carbonitrile as a white solid (0.026 g, 38%): 1H NMR (300 MHz, CDCl3) δ9.70 (s, 1H), 7.97 (dd, J=9.5, 1.0 Hz, 1H), 7.52-7.32 (m, 4H), 5.74-5.69 (m, 1H), 5.00-4.95 (m, 1H), 3.52-3.31 (m, 2H), 2.99 (m, 1H), 2.06-1.75 (m, 4H); MS (ESI+) m/z 434 [M+H]+.

Workup

  1. temperatureAfter cooling to ambient temperature
  2. extractionextracted with ethyl acetate (50 mL)
  3. washThe extract was washed with brine (2×50 mL)
  4. dry with materialdried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe resulting residue was chromatographed over silica gel (0-60% EtOAc in hexanes)

Sources & evidence

ORD record
ord-898ab5c007e04f448993b51065aa3348
Source dataset
uspto-grants-2016_09
Patent number
US09434727B2

Reaction notes

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