Trifluoroacetic acid → rac-[(2S,3R,4S)-4-(3-chloro-2-fluoro-phenyl)-3-(4-chloro-2-fluoro-phenyl)-3-cyano-2-(2,2-dimethyl-propyl)-pyrrolidin-1-yl]-acetic acid

HRID 909052Notes

Reaction equation

HRID 909052 reaction equation
C([O:5][C:6](=[O:36])[CH2:7][N:8]1[CH2:12][C@H:11]([C:13]2[CH:18]=[CH:17][CH:16]=[C:15]([Cl:19])[C:14]=2[F:20])[C@:10]([C:23]2[CH:28]=[CH:27][C:26]([Cl:29])=[CH:25][C:24]=2[F:30])([C:21]#[N:22])[C@@H:9]1[CH2:31][C:32]([CH3:35])([CH3:34])[CH3:33])(C)(C)C.FC(F)(F)C(O)=O>ClCCl>[Cl:19][C:15]1[C:14]([F:20])=[C:13]([C@H:11]2[CH2:12][N:8]([CH2:7][C:6]([OH:36])=[O:5])[C@@H:9]([CH2:31][C:32]([CH3:35])([CH3:34])[CH3:33])[C@@:10]2([C:23]2[CH:28]=[CH:27][C:26]([Cl:29])=[CH:25][C:24]=2[F:30])[C:21]#[N:22])[CH:18]=[CH:17][CH:16]=1

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 51355302rac-[(2S,3R,4S)-4-(3-chloro-2-fluoro-phenyl)-3-(4-chloro-2-fluoro-phenyl)-3-cyano-2-(2,2-dimethyl-propyl)-pyrrolidin-1-yl]-acetic acid tert-butyl ester

Product 1

HCID 51355303rac-[(2S,3R,4S)-4-(3-chloro-2-fluoro-phenyl)-3-(4-chloro-2-fluoro-phenyl)-3-cyano-2-(2,2-dimethyl-propyl)-pyrrolidin-1-yl]-acetic acidYield 85.2%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of rac-[(2S,3R,4S)-4-(3-chloro-2-fluoro-phenyl)-3-(4-chloro-2-fluoro-phenyl)-3-cyano-2-(2,2-dimethyl-propyl)-pyrrolidin-1-yl]-acetic acid tert-butyl ester (2.1 g, 3.9 mmol) in dichloromethane (20 mL) was added trifluoroacetic acid (10 mL). The reaction mixture was stirred at room temperature for 24 h. The mixture was concentrated, and water was added. The “pH” of the mixture was adjusted to 6-7 by saturated aqueous NaHCO3 solution, then extracted with ethyl acetate. The organic layer was separated, washed with water, brine, dried over MgSO4, then concentrated to give rac-[(2S,3R,4S)-4-(3-chloro-2-fluoro-phenyl)-3-(4-chloro-2-fluoro-phenyl)-3-cyano-2-(2,2-dimethyl-propyl)-pyrrolidin-1-yl]-acetic acid as a off-white solid (1.6 g, 85%). HRMS (ES+) m/z Calcd for C24H24Cl2F2N2O2+H [(M+H): 481.1256; Found: 481.1254.

Workup

  1. concentrationThe mixture was concentrated
  2. additionwater was added
  3. extractionextracted with ethyl acetate
  4. customThe organic layer was separated
  5. washwashed with water, brine
  6. dry with materialdried over MgSO4
  7. concentrationconcentrated

Sources & evidence

ORD record
ord-5d74d013035143578b826a9c4b4eecb4
Source dataset
uspto-grants-2011_09
Patent number
US08017607B2

Reaction notes

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