Trifluoroacetic acid → cyclopentyl{4-[(5-oxo-2-phenyl-5,6-dihydro-4H-1,3,4-oxadiazin-4-yl)methyl]phenyl}acetic acid

HRID 877159Notes

Reaction equation

HRID 877159 reaction equation
FC(F)(F)C(O)=O.[CH:8]1([CH:13]([C:21]2[CH:26]=[CH:25][C:24]([CH2:27][N:28]3[C:33](=[O:34])[CH2:32][O:31][C:30]([C:35]4[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=4)=[N:29]3)=[CH:23][CH:22]=2)[C:14]([O:16]C(C)(C)C)=[O:15])[CH2:12][CH2:11][CH2:10][CH2:9]1>ClCCl>[CH:8]1([CH:13]([C:21]2[CH:26]=[CH:25][C:24]([CH2:27][N:28]3[C:33](=[O:34])[CH2:32][O:31][C:30]([C:35]4[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=4)=[N:29]3)=[CH:23][CH:22]=2)[C:14]([OH:16])=[O:15])[CH2:9][CH2:10][CH2:11][CH2:12]1

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 58074542Tert-Butyl Cyclopentyl{4-[(5-oxo-2-phenyl-5,6-dihydro-4H-1,3,4-oxadiazin-4-yl)methyl]phenyl}-acetate

Product 1

HCID 58074507cyclopentyl{4-[(5-oxo-2-phenyl-5,6-dihydro-4H-1,3,4-oxadiazin-4-yl)methyl]phenyl}acetic acid

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

At room temperature, 22.67 ml (294.3 mmol) of trifluoroacetic acid were added slowly to a solution of 6.6 g (14.7 mmol) of tert-butyl cyclopentyl{4-[(5-oxo-2-phenyl-5,6-dihydro-4H-1,3,4-oxadiazin-4-yl)methyl]phenyl}acetate in 90 ml of dichloromethane, and the mixture was stirred overnight. The solvent was then removed under reduced pressure, and the residue was taken up in 100 ml of ethyl acetate and extracted with 50 ml of water. The organic phase was dried over magnesium sulfate. After filtration, the solvent was removed under reduced pressure. This gave 4.8 g (12.23 mmol, 83% of theory) of a colorless solid.

Workup

  1. customThe solvent was then removed under reduced pressure
  2. extractionextracted with 50 ml of water
  3. dry with materialThe organic phase was dried over magnesium sulfate
  4. filtrationAfter filtration
  5. customthe solvent was removed under reduced pressure

Sources & evidence

ORD record
ord-9c1eb8478533402e9fc518d26d747b7d
Source dataset
uspto-grants-2015_03
Patent number
US08987256B2

Reaction notes

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