Trifluoroacetic acid → rac-(2'S,3'R,4'S,5'R)-6-chloro-4'-(3-chloro-2-fluoro-phenyl)-2'-(2,2-dimethyl-propyl)-5-fluoro-2-oxo-1,2-dihydro-spiro[indole-3,3'-pyrrolidine]-5'-carboxylic acid trifluoroacetic acid

HRID 417209Notes

Reaction equation

HRID 417209 reaction equation
C([O:5][C:6]([CH:8]1[NH:12][CH:11]([CH2:13][C:14]([CH3:17])([CH3:16])[CH3:15])[C:10]2([C:25]3[C:20](=[CH:21][C:22]([Cl:27])=[C:23]([F:26])[CH:24]=3)[NH:19][C:18]2=[O:28])[CH:9]1[C:29]1[CH:34]=[CH:33][CH:32]=[C:31]([Cl:35])[C:30]=1[F:36])=[O:7])(C)(C)C.[F:37][C:38]([F:43])([F:42])[C:39]([OH:41])=[O:40]>ClCCl>[F:37][C:38]([F:43])([F:42])[C:39]([OH:41])=[O:40].[Cl:27][C:22]1[CH:21]=[C:20]2[NH:19][C:18](=[O:28])[C:10]3([CH:9]([C:29]4[CH:34]=[CH:33][CH:32]=[C:31]([Cl:35])[C:30]=4[F:36])[CH:8]([C:6]([OH:7])=[O:5])[NH:12][CH:11]3[CH2:13][C:14]([CH3:15])([CH3:16])[CH3:17])[C:25]2=[CH:24][C:23]=1[F:26]

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 66625331rac-(2'S,3'R,4'S,5'R)-6-chloro-4'-(3-chloro-2-fluoro-phenyl)-2'-(2,2-dimethyl-propyl)-5-fluoro-2-oxo-1,2-dihydro-spiro[indole-3,3'-pyrrolidine]-5'-carboxylic acid tert-butyl ester

Product 1

HCID 86653934rac-(2'S,3'R,4'S,5'R)-6-chloro-4'-(3-chloro-2-fluoro-phenyl)-2'-(2,2-dimethyl-propyl)-5-fluoro-2-oxo-1,2-dihydro-spiro[indole-3,3'-pyrrolidine]-5'-carboxylic acid trifluoroacetic acid

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

A solution of rac-(2′S,3′R,4′S,5′R)-6-chloro-4′-(3-chloro-2-fluoro-phenyl)-2′-(2,2-dimethyl-propyl)-5-fluoro-2-oxo-1,2-dihydro-spiro[indole-3,3′-pyrrolidine]-5′-carboxylic acid tert-butyl ester (1.8 g, 3.4 mmol) in dichloromethane (20 mL) was added trifluoroacetic acid (7 mL). The reaction mixture was stirred at room temperature for 18 h, then concentrated. The residue was then triturated with ethyl ether hexanes, concentrated, dried in vacuo to give rac-(2′S,3′R,4′S,5′R)-6-chloro-4′-(3-chloro-2-fluoro-phenyl)-2′-(2,2-dimethyl-propyl)-5-fluoro-2-oxo-1,2-dihydro-spiro[indole-3,3′-pyrrolidine]-5′-carboxylic acid trifluoroacetic acid as a off white solid (2 g, 93%).

Workup

  1. concentrationconcentrated
  2. customThe residue was then triturated with ethyl ether hexanes
  3. concentrationconcentrated
  4. customdried in vacuo

Sources & evidence

ORD record
ord-8afa8c5ffdf0410a9a26cd0b72feca68
Source dataset
uspto-grants-2012_01
Patent number
US08088815B2

Reaction notes

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