Water → HCID 86718011, compound

HRID 1500473Notes

Reaction equation

HRID 1500473 reaction equation
Br[C:2]1[C:7]2[CH2:8][C@@H:9]([CH3:11])[O:10][C:6]=2[C:5]([NH2:12])=[CH:4][C:3]=1[CH3:13].[N:14]1[CH:19]=[CH:18][C:17](B(O)O)=[CH:16][CH:15]=1.C([O-])([O-])=O.[Cs+].[Cs+].O>CN(C=O)C.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>[CH3:11][C@@H:9]1[CH2:8][C:7]2[C:2]([C:17]3[CH:18]=[CH:19][N:14]=[CH:15][CH:16]=3)=[C:3]([CH3:13])[CH:4]=[C:5]([NH2:12])[C:6]=2[O:10]1

Participants

7

Reactant 4

HCID 962Water2×HCID 10796Cesium carbonateHCID 2734379(Pyridin-4-yl)boronic acidHCID 86718010HCID 86718010, compound

Product 1

HCID 86718011HCID 86718011, compound

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 6228DimethylformamideSolvent

Conditions

Temperature
135 °C

Procedure

The mixture of (R)-4-bromo-2,5-dimethyl-2,3-dihydrobenzofuran-7-amine (3g) (1.0 g, 4.3 mmol), pyridin-4-ylboronic acid (1.08 g, 8.77 mmol), Cs2CO3 (3.56 g, 10.9 mmol), Pd(PPh3)4 (0.506 g, 0.438 mmol) and water (9 mL) in DMF (44 mL) was stirred at 135° C. under N2 for 1 h. It was cooled to ambient temperature, poured into water (50 mL), extracted with EtOAc (150 mL, washed with water, brine, dried and concentrated. The residue was purified by column chromatography on silica gel eluting with hexanes/EtOAc (20:1 to 5:1 to 1:1) to give the title compound (3h) as a solid. MS-ESI (m/z): 241 (M+1)+.

Workup

  1. temperatureIt was cooled to ambient temperature
  2. extractionextracted with EtOAc (150 mL
  3. washwashed with water, brine
  4. customdried
  5. concentrationconcentrated
  6. customThe residue was purified by column chromatography on silica gel eluting with hexanes/EtOAc (20:1 to 5:1 to 1:1)

Sources & evidence

ORD record
ord-94dbb8de730440d2aae66504afb3c61b
Source dataset
uspto-grants-2015_12
Patent number
US09206166B2

Reaction notes

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