Dimethylformamide → 3-(4-(5-Fluoro-2-(trifluoromethyl)phenyl)piperidine-1-carbonyl)-[1,2,4]triazolo[4,3-a]pyridine-6-carbonitrile

HRID 58482Notes

Reaction equation

HRID 58482 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]=[C:23]([F:25])[CH:22]=[CH:21][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>C(=O)(O)[O-].[Na+].[C-]#N.[Zn+2].[C-]#N.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[F:25][C:23]1[CH:22]=[CH:21][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]=1

Participants

6

Reactant 2

HCID 6228DimethylformamideHCID 118483463(6-Bromo-[1,2,4]triazolo[4,3-a]pyridin-3-yl)(4-(5-fluoro-2-(trifluoromethyl)phenyl)piperidin-1-yl)methanone

Product 1

HCID 1184834223-(4-(5-Fluoro-2-(trifluoromethyl)phenyl)piperidine-1-carbonyl)-[1,2,4]triazolo[4,3-a]pyridine-6-carbonitrileYield 41%

Reagents, catalysts & solvents 3

HCID 11186Zinc cyanide (Zn(CN)2)CatalystHCID 178418397HCID 178418397, compoundCatalystHCID 516892Sodium BicarbonateSolvent

Conditions

Temperature
130 °C

Procedure

A solution of (6-bromo-[1,2,4]triazolo[4,3-a]pyridin-3-yl)(4-(5-fluoro-2-(trifluoromethyl)phenyl)piperidin-1-yl)methanone (97 mg, 0.21 mmol) in DMF (2.2 mL) was sparged with Ar for 20 min. Zinc cyanide (48 mg, 0.41 mmol) was added and the solution sparged with Ar for 10 min. To the solution was added Pd(PPh3)4 (24 mg, 0.021 mmol) and the vessel was sealed and heated to 130° C. with microwaves for 30 min. The mixture was diluted with saturated sodium bicarbonate solution (10 mL) and extracted with EtOAc (4×30 mL). The combined organic extracts were concentrated to dryness under reduced pressure. The resulting residue was chromatographed over silica gel (Isco CombiFlash Rf unit, 12 g Redisep column, 0% to 50% EtOAc in hexanes) and freeze dried to give 3-(4-(5-fluoro-2-(trifluoromethyl)phenyl)piperidine-1-carbonyl)-[1,2,4]triazolo[4,3-a]pyridine-6-carbonitrile as a white solid (35 mg, 41%): mp 190-197° C.; 1H NMR (500 MHz, DMSO-d6) δ 9.54-9.53 (m, 1H), 8.14 (dd, J=9.5, 1.5 Hz, 1H), 7.82 (d, J=9.5, 1.5 Hz, 1H), 7.78 (dd, J=9.0, 6.0 Hz, 1H), 7.56 (dd, J=10.5, 2.5 Hz, 1H), 7.30-7.24 (m, 1H), 5.20-5.10 (m, 1H), 4.73-4.71 (m, 1H), 3.43-3.34 (m, 1H), 3.29-3.20 (m, 1H), 3.08-3.00 (m, 1H), 1.99-1.77 (m, 4H); ESI MS m/z 418 [M+H]+.

Workup

  1. customthe solution sparged with Ar for 10 min
  2. customthe vessel was sealed
  3. extractionextracted with EtOAc (4×30 mL)
  4. concentrationThe combined organic extracts were concentrated to dryness under reduced pressure
  5. customThe resulting residue was chromatographed over silica gel (Isco CombiFlash Rf unit, 12 g Redisep column, 0% to 50% EtOAc in hexanes)
  6. customfreeze dried

Sources & evidence

ORD record
ord-6cc085f937dd478dbde4986f2dc3077f
Source dataset
uspto-grants-2016_09
Patent number
US09434727B2

Reaction notes

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