Trifluoroacetic acid → 4-[(S)-4-Carboxy-2-({5-[2-((S)-2-carboxy-4,4-difluoro-pyrrolidin-1-yl)-2-oxo-ethoxy]-1-phenyl-1H-pyrazole-3-carbonyl}-amino)-butyryl]-piperazine-1-carboxylic acid ethyl ester

HRID 1970576Notes

Reaction equation

HRID 1970576 reaction equation
[CH2:1]([O:3][C:4]([N:6]1[CH2:11][CH2:10][N:9]([C:12](=[O:51])[C@@H:13]([NH:23][C:24]([C:26]2[CH:30]=[C:29]([O:31][CH2:32][C:33]([N:35]3[CH2:39][C:38]([F:41])([F:40])[CH2:37][C@H:36]3[C:42]([OH:44])=[O:43])=[O:34])[N:28]([C:45]3[CH:50]=[CH:49][CH:48]=[CH:47][CH:46]=3)[N:27]=2)=[O:25])[CH2:14][CH2:15][C:16]([O:18]C(C)(C)C)=[O:17])[CH2:8][CH2:7]1)=[O:5])[CH3:2].C(O)(C(F)(F)F)=O>ClCCl>[CH2:1]([O:3][C:4]([N:6]1[CH2:11][CH2:10][N:9]([C:12](=[O:51])[C@@H:13]([NH:23][C:24]([C:26]2[CH:30]=[C:29]([O:31][CH2:32][C:33]([N:35]3[CH2:39][C:38]([F:40])([F:41])[CH2:37][C@H:36]3[C:42]([OH:44])=[O:43])=[O:34])[N:28]([C:45]3[CH:46]=[CH:47][CH:48]=[CH:49][CH:50]=3)[N:27]=2)=[O:25])[CH2:14][CH2:15][C:16]([OH:18])=[O:17])[CH2:8][CH2:7]1)=[O:5])[CH3:2]

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 66855209HCID 66855209, compound

Product 1

HCID 668553234-[(S)-4-Carboxy-2-({5-[2-((S)-2-carboxy-4,4-difluoro-pyrrolidin-1-yl)-2-oxo-ethoxy]-1-phenyl-1H-pyrazole-3-carbonyl}-amino)-butyryl]-piperazine-1-carboxylic acid ethyl ester

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of 100 mg 4-[(S)-4-tert-Butoxycarbonyl-2-({5-[2-((S)-2-carboxy-4,4-difluoro-pyrrolidin-1-yl)-2-oxo-ethoxy]-1-phenyl-1H-pyrazole-3-carbonyl}-amino)-butyryl]-piperazine-1-carboxylic acid ethyl ester in 2 ml dichloromethane were added 300 μl TFA. After stirring for 12 h the solvents were removed under reduced pressure and the residue purified by preparative HPLC (C18 reverse phase column, elution with a water/MeCN gradient with 0.1% TFA). The fractions containing the product were lyophilized to yield the pure product. Yield: 63 mg MS (ES+): m/e=665.

Workup

  1. customwere removed under reduced pressure
  2. customthe residue purified by preparative HPLC (
  3. washC18 reverse phase column, elution with a water/MeCN gradient with 0.1% TFA)
  4. additionThe fractions containing the product
  5. customto yield the pure product

Sources & evidence

ORD record
ord-d5a3691d6c544d309865910e0e3d670b
Source dataset
uspto-grants-2013_04
Patent number
US08426420B2

Reaction notes

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