1,2-Diaminocyclohexane, trans- → (S)-tert-butyl 4-(3-(2-fluoro-4-(methylsulfonyl)phenoxy)-2-oxopyrrolidin-1-yl)piperidine-1-carboxylate

HRID 407880Notes

Reaction equation

HRID 407880 reaction equation
Br[C:2]1[CH:27]=[CH:26][C:5]([O:6][C@H:7]2[CH2:11][CH2:10][N:9]([CH:12]3[CH2:17][CH2:16][N:15]([C:18]([O:20][C:21]([CH3:24])([CH3:23])[CH3:22])=[O:19])[CH2:14][CH2:13]3)[C:8]2=[O:25])=[C:4]([F:28])[CH:3]=1.[CH3:29][S:30]([O-:32])=[O:31].[Na+].[C@@H]1(N)CCCC[C@H]1N>CS(C)=O>[F:28][C:4]1[CH:3]=[C:2]([S:30]([CH3:29])(=[O:32])=[O:31])[CH:27]=[CH:26][C:5]=1[O:6][C@H:7]1[CH2:11][CH2:10][N:9]([CH:12]2[CH2:17][CH2:16][N:15]([C:18]([O:20][C:21]([CH3:24])([CH3:23])[CH3:22])=[O:19])[CH2:14][CH2:13]2)[C:8]1=[O:25]

Participants

5

Reactant 3

HCID 438061,2-Diaminocyclohexane, trans-HCID 2733271Sodium methanesulfinateHCID 86688077(S)-tert-butyl 4-(3-(4-bromo-2-fluorophenoxy)-2-oxopyrrolidin-1-yl)piperidine-1-carboxylate

Product 1

HCID 86688078(S)-tert-butyl 4-(3-(2-fluoro-4-(methylsulfonyl)phenoxy)-2-oxopyrrolidin-1-yl)piperidine-1-carboxylateYield 89.7%

Reagents, catalysts & solvents 1

HCID 679Dimethyl SulfoxideSolvent

Procedure

(S)-tert-Butyl 4-(3-(4-bromo-2-fluorophenoxy)-2-oxopyrrolidin-1-yl)piperidine-1-carboxylate (1.8 g, 3.9 mmol) was dissolved in DMSO (30 mL) and purged with nitrogen. Sodium methanesulfinate (0.60 g, 5.9 mmol) and trans-cyclohexane-1,2-diamine (0.19 mL, 1.6 mmol) were added followed by Cu(I) triflate benzene complex (0.20 g, 0.39 mmol). The reaction was plunged into a 110° C. oil bath under nitrogen and stirred overnight. The reaction was cooled to ambient temperature, partitioned between water and EtOAc, extracted with EtOAc, washed with brine, dried over Na2SO4, filtered and concentrated. The residue was purified over silica gel (100% EtOAc) to afford (S)-tert-butyl 4-(3-(2-fluoro-4-(methylsulfonyl)phenoxy)-2-oxopyrrolidin-1-yl)piperidine-1-carboxylate (1.6 g, 3.5 mmol, 89% yield) as a white solid.

Workup

  1. custompurged with nitrogen
  2. customwas plunged into a 110° C.
  3. custompartitioned between water and EtOAc
  4. extractionextracted with EtOAc
  5. washwashed with brine
  6. dry with materialdried over Na2SO4
  7. filtrationfiltered
  8. concentrationconcentrated
  9. customThe residue was purified over silica gel (100% EtOAc)

Sources & evidence

ORD record
ord-b4e02b39efcb48069e57305ec78b7e96
Source dataset
uspto-grants-2014_06
Patent number
US08754226B2

Reaction notes

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