Water → Tert-butyl(5-{[2-(acetylamino)[1,3]thiazolo[5,4-b]pyridin-5-yl]oxy}-2-fluorophenyl)carbamate

HRID 1800551Notes

Reaction equation

HRID 1800551 reaction equation
[C:1]([O:5][C:6](=[O:26])[NH:7][C:8]1[CH:13]=[C:12]([O:14][C:15]2[N:20]=[C:19]3[S:21][C:22]([NH2:24])=[N:23][C:18]3=[CH:17][CH:16]=2)[CH:11]=[CH:10][C:9]=1[F:25])([CH3:4])([CH3:3])[CH3:2].[C:27](Cl)(=[O:29])[CH3:28].O>CN(C)C1C=CN=CC=1.N1C=CC=CC=1>[C:1]([O:5][C:6](=[O:26])[NH:7][C:8]1[CH:13]=[C:12]([O:14][C:15]2[N:20]=[C:19]3[S:21][C:22]([NH:24][C:27](=[O:29])[CH3:28])=[N:23][C:18]3=[CH:17][CH:16]=2)[CH:11]=[CH:10][C:9]=1[F:25])([CH3:4])([CH3:2])[CH3:3]

Participants

6

Reactant 3

HCID 962WaterHCID 6367Acetyl chlorideHCID 86657972Tert-butyl {5-[(2-amino[1,3]thiazolo[5,4-b]pyridin-5-yl)oxy]-2-fluorophenyl}carbamate

Product 1

HCID 91133308Tert-butyl(5-{[2-(acetylamino)[1,3]thiazolo[5,4-b]pyridin-5-yl]oxy}-2-fluorophenyl)carbamateYield 52%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 1049PyridineSolvent

Procedure

To a solution of tert-butyl{5-[(2-amino[1,3]thiazolo[5,4-b]pyridin-5-yl)oxy]-2-fluorophenyl}carbamate (1.13 g, 3.0 mmol) produced in Example C63(iv) and N,N-dimethylpyridine-4-amine (1.22 g, 10 mmol) in pyridine (10 mL) was added dropwise acetyl chloride (0.79 g, 10 mmol) under ice-cooling, and the mixture was stirred at room temperature overnight. To the reaction mixture was added water (200 mL), and the mixture was extracted with ethyl acetate (100 mL×2). The ethyl acetate layers were combined, and dried over anhydrous magnesium sulfate. The insoluble material was filtered off, and the filtrate was concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (ethyl acetate/hexane=0/100→100/0), and triturated with diethyl ether to give the title compound (0.65 g, 52%) as a white amorphous.

Workup

  1. temperaturecooling
  2. extractionthe mixture was extracted with ethyl acetate (100 mL×2)
  3. dry with materialdried over anhydrous magnesium sulfate
  4. filtrationThe insoluble material was filtered off
  5. concentrationthe filtrate was concentrated under reduced pressure
  6. customThe obtained residue was purified by silica gel column chromatography (ethyl acetate/hexane=0/100→100/0)
  7. customtriturated with diethyl ether

Sources & evidence

ORD record
ord-0c2b76da05034eb487d245698ca3fbe8
Source dataset
uspto-grants-2013_01
Patent number
US08344135B2

Reaction notes

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