3-Bromopyridine → 3(S)-[(3-chloro-4-fluorophenyl)pyridin-3-ylamino]pyrrolidine-1-carboxylic acid tert-butyl ester

HRID 1966028Notes

Reaction equation

HRID 1966028 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][C@H:10]([NH:13][C:14]2[CH:19]=[CH:18][C:17]([F:20])=[C:16]([Cl:21])[CH:15]=2)[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].Br[C:23]1[CH:24]=[N:25][CH:26]=[CH:27][CH:28]=1.CC1(C)C2C=CC=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=2OC2C1=CC=CC=2P(C1C=CC=CC=1)C1C=CC=CC=1.CC(C)([O-])C.[Na+]>C([O-])(=O)C.[Pd+2].C([O-])(=O)C.C1(C)C=CC=CC=1>[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][C@H:10]([N:13]([C:14]2[CH:19]=[CH:18][C:17]([F:20])=[C:16]([Cl:21])[CH:15]=2)[C:23]2[CH:24]=[N:25][CH:26]=[CH:27][CH:28]=2)[CH2:9]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

7

Reactant 4

HCID 122863-BromopyridineHCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 23676156Sodium t-butoxideHCID 666570713(S)-(3-chloro-4-fluorophenylamino)pyrrolidine-1-carboxylic acid tert-butyl ester

Product 1

HCID 666571393(S)-[(3-chloro-4-fluorophenyl)pyridin-3-ylamino]pyrrolidine-1-carboxylic acid tert-butyl ester

Reagents, catalysts & solvents 2

HCID 167845palladium(II) acetateCatalystHCID 1140TolueneSolvent

Procedure

To a 10 ml of toluene solution containing 1.0 g of 3(S)-(3-chloro-4-fluorophenylamino)pyrrolidine-1-carboxylic acid tert-butyl ester (3.2 mmol) and 0.75 g of 3-bromopyridine (4.75 mmol) were added 50 mg of 9,9-dimethyl-4,5-bis(diphenylphosphino)xanthene (XANTPHOS, 0.09 mmol), 21.4 mg of palladium acetate (0.10 mmol) and 11.6 g of sodium tert-butoxide (120 mmol). The mixture was heated under reflux under a nitrogen atmosphere for 9 hours. After cooling to room temperature, the reaction solution was filtered using Celite. Water was added to the filtrate, and extraction with ethyl acetate was conducted. After drying over sodium sulfate and concentration under reduced pressure, the residue was then purified by silica gel column chromatography (n-hexane:ethyl acetate=1:1). The purified product was concentrated under reduced pressure to thereby obtain 1.14 g of oily light yellow 3(S)-[(3-chloro-4-fluorophenyl)pyridin-3-ylamino]pyrrolidine-1-carboxylic acid tert-butyl ester.

Workup

  1. temperatureThe mixture was heated
  2. temperatureunder reflux under a nitrogen atmosphere for 9 hours
  3. filtrationthe reaction solution was filtered
  4. additionWater was added to the filtrate, and extraction with ethyl acetate
  5. dry with materialAfter drying over sodium sulfate and concentration under reduced pressure
  6. customthe residue was then purified by silica gel column chromatography (n-hexane:ethyl acetate=1:1)
  7. concentrationThe purified product was concentrated under reduced pressure

Sources & evidence

ORD record
ord-ca192398b28444c2a4bf44ebe6706b19
Source dataset
uspto-grants-2013_04
Patent number
US08420623B2

Reaction notes

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