Triethylamine → 4-[(S)-3-tert-Butoxycarbonylaminopyrrolidin-1-yl]-3-chloro-2,5-difluorobenzoic acid ethyl ester

HRID 10281Notes

Reaction equation

HRID 10281 reaction equation
[CH2:1]([O:3][C:4](=[O:15])[C:5]1[CH:10]=[C:9]([F:11])[C:8](F)=[C:7]([Cl:13])[C:6]=1[F:14])[CH3:2].C(N(CC)CC)C.[C:23]([O:27][C:28](=[O:35])[NH:29][C@H:30]1[CH2:34][CH2:33][NH:32][CH2:31]1)([CH3:26])([CH3:25])[CH3:24]>C(#N)C.C(OCC)(=O)C>[CH2:1]([O:3][C:4](=[O:15])[C:5]1[CH:10]=[C:9]([F:11])[C:8]([N:32]2[CH2:33][CH2:34][C@H:30]([NH:29][C:28]([O:27][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:35])[CH2:31]2)=[C:7]([Cl:13])[C:6]=1[F:14])[CH3:2]

Participants

6

Reactant 3

HCID 8471TriethylamineHCID 1514396(3S)-(-)-3-(tert-Butoxycarbonylamino)pyrrolidineHCID 210411723-Chloro-2,4,5-trifluorobenzoic acid ethyl ester

Product 1

HCID 586818944-[(S)-3-tert-Butoxycarbonylaminopyrrolidin-1-yl]-3-chloro-2,5-difluorobenzoic acid ethyl esterYield 100.1%

Reagents, catalysts & solvents 2

HCID 6342AcetonitrileSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of 3-chloro-2,4,5-trifluorobenzoic acid ethyl ester (Example 1c, 5.50 g, 23.05 mmol) in acetonitrile (25 mL) is added triethylamine (6.43 mL, 46.1 mmol) and (S)-pyrrolidin-3-ylcarbamic acid tert-butyl ester (4.72 g, 25.4 mmol). After 48 hours, the mixture is diluted with ethyl acetate and washed with saturated NaHCO3, water, and brine. The organic layer is dried over MgSO4, filtered, and the filtrate is concentrated to afford the title compound (9.34 g). MS CI: m/z 405 (MH+).

Workup

  1. washwashed with saturated NaHCO3, water, and brine
  2. dry with materialThe organic layer is dried over MgSO4
  3. filtrationfiltered
  4. concentrationthe filtrate is concentrated

Sources & evidence

ORD record
ord-2dd800356e8c4c8d8b56e82b571f1f7f
Source dataset
uspto-grants-2006_08
Patent number
US07094780B1

Reaction notes

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