4-[(R)-3-(3,5-dichloro-phenyl)-4,4,4-trifluoro-3-nitromethyl-butyryl]-2-methyl-benzoic acid tert-butyl ester → 4-[(R)-4-(3,5-dichloro-phenyl)-4-trifluoromethyl-4,5-dihydro-3H-pyrrol-2-yl]-2-methyl-benzoic acid tert-butyl ester

HRID 589632Notes

Reaction equation

HRID 589632 reaction equation
[C:1]([O:5][C:6](=[O:34])[C:7]1[CH:12]=[CH:11][C:10]([C:13](=O)[CH2:14][C@@:15]([C:24]2[CH:29]=[C:28]([Cl:30])[CH:27]=[C:26]([Cl:31])[CH:25]=2)([CH2:20][N+:21]([O-])=O)[C:16]([F:19])([F:18])[F:17])=[CH:9][C:8]=1[CH3:33])([CH3:4])([CH3:3])[CH3:2]>C(O)C.[Ni].O>[C:1]([O:5][C:6](=[O:34])[C:7]1[CH:12]=[CH:11][C:10]([C:13]2[CH2:14][C@:15]([C:24]3[CH:29]=[C:28]([Cl:30])[CH:27]=[C:26]([Cl:31])[CH:25]=3)([C:16]([F:19])([F:18])[F:17])[CH2:20][N:21]=2)=[CH:9][C:8]=1[CH3:33])([CH3:4])([CH3:3])[CH3:2]

Participants

5

Reactant 1

HCID 547615654-[(R)-3-(3,5-dichloro-phenyl)-4,4,4-trifluoro-3-nitromethyl-butyryl]-2-methyl-benzoic acid tert-butyl ester

Product 1

HCID 547617404-[(R)-4-(3,5-dichloro-phenyl)-4-trifluoromethyl-4,5-dihydro-3H-pyrrol-2-yl]-2-methyl-benzoic acid tert-butyl esterYield 85.9%

Reagents, catalysts & solvents 3

HCID 935NickelCatalystHCID 702EthanolSolventHCID 962WaterSolvent

Procedure

Alternatively, the title compound can be obtained by carrying out the following experiment: To a vigorously stirred solution of 4-[(R)-3-(3,5-dichloro-phenyl)-4,4,4-trifluoro-3-nitromethyl-butyryl]-2-methyl-benzoic acid tert-butyl ester (100 mg) in ethanol (6 mL) was added Raney Nickel (1.44 g, 50% suspension in water, previously washed with dry ethanol) and the reaction was stirred at room temperature under hydrogen (1 atm) for one hour. Then the solution was filtered over celite, and the resulting filtrate was concentrated in vacuo to give the title compound (78 mg) as a pale yellow solid. Chiral HPLC analysis (Chiralpack IA, Heptane:2-propanol:diethylamine=90:10:0.1, 1 ml/min, retention time 5.77 minutes (91.43%), 8.71 minutes (3.79%).

Workup

  1. washpreviously washed with dry ethanol) and the reaction
  2. filtrationThen the solution was filtered over celite
  3. concentrationthe resulting filtrate was concentrated in vacuo

Sources & evidence

ORD record
ord-860e77aeb5b9429ca4115054d914da32
Source dataset
uspto-grants-2016_01
Patent number
US09233920B2

Reaction notes

Loading…