3-Nitrophenylboronic Acid → HCID 23433444, compound

HRID 2290067Notes

Reaction equation

HRID 2290067 reaction equation
[N+:1]([C:4]1[CH:5]=[C:6](B(O)O)[CH:7]=[CH:8][CH:9]=1)([O-:3])=[O:2].Br[C:14]1[CH:20]=[CH:19][C:17]([NH2:18])=[C:16]([F:21])[CH:15]=1.C([O-])([O-])=O.[K+].[K+]>C1(C)C=CC=CC=1.O.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>[NH2:18][C:17]1[CH:19]=[CH:20][C:14]([C:6]2[CH:7]=[CH:8][CH:9]=[C:4]([N+:1]([O-:3])=[O:2])[CH:5]=2)=[CH:15][C:16]=1[F:21]

Participants

8

Reactant 3

HCID 16773-Nitrophenylboronic AcidHCID 11430Potassium CarbonateHCID 1230504-Bromo-2-fluoroaniline

Product 1

HCID 23433444HCID 23433444, compound

Reagents, catalysts & solvents 4

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 1140TolueneSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
95 °C

Procedure

A mixture of 3-nitrobenzeneboronic acid (0.70 g, 4.2 mmol), 4-bromo-2-fluoroaniline (730 mg, 4.0 mmol), (PPh3)4Pd (93 mg, 0.08 mmol), and K2CO3 (0.69 g, 5.0 mmol) in toluene (20 mL) and water (2 mL) was heated at 95° C. for 16 h and the mixture was diluted with EtOAc (20 mL). The mixture was washed with water (10 mL) and brine (10 mL), concentrated and purified by silica gel chromatography to afford the 4-amino-3-fluoro-3'-nitrobiphenyl (structure 82 of Scheme XXI, where R1 =R3-7 =H, R8 =F) (0.4 g, 41%) as a yellow solid.

Workup

  1. washThe mixture was washed with water (10 mL) and brine (10 mL)
  2. concentrationconcentrated
  3. custompurified by silica gel chromatography

Sources & evidence

ORD record
ord-af3917b6c6634679a397085d62c3fed6
Source dataset
uspto-grants-2000_07
Patent number
US06093821

Reaction notes

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