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Sodium Carbonate → 4-(2-Amino-5-chloropyridin-3-yl)phenol

HRID 2035809
Notes
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Reaction equation

HRID 2035809 reaction equation
C(=O)([O-])[O-].[Na+].[Na+].[Si:7]([O:14][C:15]1[CH:20]=[CH:19][C:18](B(O)O)=[CH:17][CH:16]=1)([C:10]([CH3:13])([CH3:12])[CH3:11])([CH3:9])[CH3:8].Br[C:25]1[C:26]([NH2:32])=[N:27][CH:28]=[C:29]([Cl:31])[CH:30]=1>COCCOC.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>[NH2:32][C:26]1[C:25]([C:18]2[CH:17]=[CH:16][C:15]([OH:14])=[CH:20][CH:19]=2)=[CH:30][C:29]([Cl:31])=[CH:28][N:27]=1.[Si:7]([O:14][C:15]1[CH:20]=[CH:19][C:18]([C:25]2[C:26]([NH2:32])=[N:27][CH:28]=[C:29]([Cl:31])[CH:30]=2)=[CH:17][CH:16]=1)([C:10]([CH3:13])([CH3:12])[CH3:11])([CH3:9])[CH3:8]
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

8

Reactant 3

HCID 10340Sodium CarbonateHCID 27639713-Bromo-5-chloropyridin-2-amineHCID 111078154-(tert-Butyldimethylsilyloxy)phenylboronic Acid (contains varying amounts of Anhydride)

Product 2

HCID 667480044-(2-Amino-5-chloropyridin-3-yl)phenolHCID 667485503-(4-{[Tert-butyl(dimethyl)silyl]oxy}phenyl)-5-chloropyridin-2-amine

Reagents, catalysts & solvents

3
HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 80711,2-DimethoxyethaneSolvent

Conditions

Temperature
80 °C

Procedure

A mixture of sodium carbonate (4.09 g), tetrakis(triphenylphosphine)palladium(0) (0.668 g), 4-(tert-butyldimethylsilyloxy)phenylboronic acid (6.32 g) and 3-bromo-5-chloropyridin-2-amine (4.00 g) in DME (100 mL) and water (20 mL) was stirred at 80° C. overnight. Silica gel was added and the mixture was concentrated in vacuo. The residue was purified by column chromatography (silica gel, eluted with EtOAc in hexane) to give 4-(2-amino-5-chloropyridin-3-yl)phenol (3.05 g) as a pale yellow solid and 3-(4-{[tert-butyl(dimethyl)silyl]oxy}phenyl)-5-chloropyridin-2-amine (1.55 g) as a yellow solid.

Workup

  1. additionSilica gel was added
  2. concentrationthe mixture was concentrated in vacuo
  3. customThe residue was purified by column chromatography (silica gel, eluted with EtOAc in hexane)

Sources & evidence

ORD record
ord-338e77853b014eb9a4b17b887d29b64c
Source dataset
uspto-grants-2013_11
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08575154B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes