Acetic Acid → HCID 66645618, compound

HRID 1694929Notes

Reaction equation

HRID 1694929 reaction equation
C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].[C:15]([O:19][C:20](=[O:27])[NH:21][C:22]([CH3:26])([CH3:25])[CH:23]=O)([CH3:18])([CH3:17])[CH3:16].[Cl:28][C:29]1[CH:35]=[CH:34][C:33]([F:36])=[CH:32][C:30]=1[NH2:31].C(O)(=O)C.C(=O)(O)[O-].[Na+]>C(Cl)Cl>[C:15]([O:19][C:20](=[O:27])[NH:21][C:22]([CH3:26])([CH3:25])[CH2:23][NH:31][C:30]1[CH:32]=[C:33]([F:36])[CH:34]=[CH:35][C:29]=1[Cl:28])([CH3:18])([CH3:17])[CH3:16]

Participants

7

Reactant 5

HCID 176Acetic AcidHCID 516892Sodium BicarbonateHCID 27365092-Chloro-5-fluoroanilineHCID 5049666Sodium triacetoxyborohydrideHCID 14578674tert-butyl N-(2-methyl-1-oxopropan-2-yl)carbamate

Product 1

HCID 66645618HCID 66645618, compoundYield 53%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

10.0 g of sodium triacetoxyborohydride (47.2 mmol) was added to a solution of 6.0 g of (1,1-dimethyl-2-oxoethyl)carbamic acid t-butyl ester obtained in Reference Example 3 (32.0 mmol), 4.6 g of 2-chloro-5-fluoroaniline (32.0 mmol) and 1.8 ml of acetic acid (32.0 mmol) in methylene chloride (320 ml) under ice-cooling, and the mixture was stirred at room temperature for 16 hours. A saturated sodium bicarbonate aqueous solution was added to the reaction mixture, followed by extraction with methylene chloride. Then, the organic layer was washed with brine and dried over anhydrous sodium sulfate. After filtration, the solvent was evaporated under reduced pressure, and the residue was purified by silica gel column chromatography (elution solvent:hexane/ethyl acetate=5/1) to obtain 5.36 g of the title compound (yield: 53%).

Workup

  1. temperaturecooling
  2. extractionfollowed by extraction with methylene chloride
  3. washThen, the organic layer was washed with brine
  4. dry with materialdried over anhydrous sodium sulfate
  5. filtrationAfter filtration
  6. customthe solvent was evaporated under reduced pressure
  7. customthe residue was purified by silica gel column chromatography (elution solvent:hexane/ethyl acetate=5/1)

Sources & evidence

ORD record
ord-a3158525432b43c59e411a0debb53de4
Source dataset
uspto-grants-2012_04
Patent number
US08158790B2

Reaction notes

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