Methanamine, N-methoxy-, hydrochloride (1:1) → (S)-tert-butyl 1-(3-fluoro-4-(methoxy(methyl)carbamoyl)phenyl)ethylcarbamate

HRID 57391Notes

Reaction equation

HRID 57391 reaction equation
[C:1]([O:5][C:6]([NH:8][C@H:9]([C:11]1[CH:19]=[CH:18][C:14]([C:15]([OH:17])=O)=[C:13]([F:20])[CH:12]=1)[CH3:10])=[O:7])([CH3:4])([CH3:3])[CH3:2].Cl.[CH3:22][NH:23][O:24][CH3:25].CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.CCN(C(C)C)C(C)C>CN(C=O)C.CCOC(C)=O.CCOC(C)=O.CCCCCCC>[F:20][C:13]1[CH:12]=[C:11]([C@@H:9]([NH:8][C:6](=[O:7])[O:5][C:1]([CH3:2])([CH3:3])[CH3:4])[CH3:10])[CH:19]=[CH:18][C:14]=1[C:15](=[O:17])[N:23]([O:24][CH3:25])[CH3:22]

Participants

8

Reactant 4

HCID 81138Methanamine, N-methoxy-, hydrochloride (1:1)HCID 81531DiisopropylethylamineHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 86730146(S)-4-(1-(tert-butoxycarbonylamino)ethyl)-2-fluorobenzoic acid

Product 1

HCID 86730148(S)-tert-butyl 1-(3-fluoro-4-(methoxy(methyl)carbamoyl)phenyl)ethylcarbamateYield 92%

Reagents, catalysts & solvents 3

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolventHCID 21899848Ethylacetate heptaneSolvent

Procedure

A solution of (S)-4-(1-(tert-butoxycarbonylamino)ethyl)-2-fluorobenzoic acid (1.416 g, 5 mmol), N,O-dimethylhydroxylamine hydrochloride (732 mg, 7.5 mmol), HATU (2.85 g, 7.5 mmol) and DIPEA (3.49 mL, 20 mmol) in DMF (25 mL) was stirred at room temperature for 16 h. The reaction mixture was diluted with EtOAc and washed with water. After separation, the aqueous phase was washed with EtOAc (2×75 mL). Combined organics were dried over Na2SO4, filtered and concentrated. Silica gel column chromatography (EtOAc/heptane 12 to 100%) provided (S)-tert-butyl 1-(3-fluoro-4-(methoxy(methyl)carbamoyl)phenyl)ethylcarbamate as a white solid (1.5 g, 92% yield).

Workup

  1. washwashed with water
  2. customAfter separation
  3. washthe aqueous phase was washed with EtOAc (2×75 mL)
  4. dry with materialCombined organics were dried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated

Sources & evidence

ORD record
ord-52c00caa09944b0d8e9bb604acbd1ada
Source dataset
uspto-grants-2016_09
Patent number
US09434719B2

Reaction notes

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