Acetonitrile → 2-(2-Methylpyridin-4-yl)-4,5-dihydrobenzo[b]thieno[2,3-d]oxepine-8-carbonitrile

HRID 1849038Notes

Reaction equation

HRID 1849038 reaction equation
Br[C:2]1[S:11][C:10]2[C:9]3[CH:12]=[CH:13][C:14]([C:16]#[N:17])=[CH:15][C:8]=3[O:7][CH2:6][CH2:5][C:4]=2[CH:3]=1.C(=O)([O-])[O-].[Na+].[Na+].[C:24](#[N:26])[CH3:25]>CCOC(C)=O.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>[CH3:25][C:24]1[CH:10]=[C:4]([C:2]2[S:11][C:10]3[C:9]4[CH:12]=[CH:13][C:14]([C:16]#[N:17])=[CH:15][C:8]=4[O:7][CH2:6][CH2:5][C:4]=3[CH:3]=2)[CH:3]=[CH:2][N:26]=1

Participants

6

Reactant 3

HCID 6342AcetonitrileHCID 10340Sodium CarbonateHCID 582038742-Bromo-4,5-dihydrobenzo[b]thieno[2,3-d]oxepine-8-carbonitrile

Product 1

HCID 582041812-(2-Methylpyridin-4-yl)-4,5-dihydrobenzo[b]thieno[2,3-d]oxepine-8-carbonitrileYield 17%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 8857Ethyl AcetateSolvent

Procedure

A 2 ml microwave vial was loaded with a slurry of 2-Bromo-4,5-dihydro-6-oxa-1-thia-benzo[e]azulene-8-carbonitrile (170 mg, 0.55 mmol) and pyridine-2-amino boronic acid pinacolester (130 mg, 0.61 mmol) in 0.800 ml of aqueous 2M Sodium carbonate and 1.2 ml of ACN. The reaction mixture was degassed by bubbling nitrogen through the solution for several minutes. Next palladium tetrakis (51 mg, 2 mmol) was added to the reaction mixture and the vial was tightly capped and flash heated a Biotage microwave at 180 C for 10 minutes. The cooled reaction mixture was diluted with a large volume of EtOAc and the organic was washed with water and saline and concentrated in vacuo. The resulting residue was taken into DMF and purified by preparative RP-HPLC to give 32 mg (17%) of 2-(2-methylpyridin-4-yl)-4,5-dihydrobenzo[b]thieno[2,3-d]oxepine-8-carbonitrile

Workup

  1. customThe reaction mixture was degassed
  2. customby bubbling nitrogen through the solution for several minutes
  3. customthe vial was tightly capped
  4. temperatureflash heated a Biotage microwave at 180 C for 10 minutes
  5. customThe cooled reaction mixture
  6. washthe organic was washed with water and saline
  7. concentrationconcentrated in vacuo
  8. custompurified by preparative RP-HPLC

Sources & evidence

ORD record
ord-f8b1d806920b4947923d302d3504a14d
Source dataset
uspto-grants-2015_02
Patent number
US08952043B2

Reaction notes

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