2-Methylpyridine → 2-methyl-N-(2-(pyridin-2-yl)-1,1-bis(3-(trifluoromethoxy)phenyl)-ethyl)propane-2-sulfinamide

HRID 238740Notes

Reaction equation

HRID 238740 reaction equation
[N:1]1[CH:6]=[CH:5][CH:4]=[CH:3][C:2]=1[CH3:7].[Li]CCCC.[F:13][C:14]([F:42])([F:41])[O:15][C:16]1[CH:17]=[C:18]([C:22]([C:30]2[CH:35]=[CH:34][CH:33]=[C:32]([O:36][C:37]([F:40])([F:39])[F:38])[CH:31]=2)=[N:23][S@@:24]([C:26]([CH3:29])([CH3:28])[CH3:27])=[O:25])[CH:19]=[CH:20][CH:21]=1>CCOCC>[CH3:29][C:26]([S:24]([NH:23][C:22]([C:30]1[CH:35]=[CH:34][CH:33]=[C:32]([O:36][C:37]([F:40])([F:38])[F:39])[CH:31]=1)([C:18]1[CH:19]=[CH:20][CH:21]=[C:16]([O:15][C:14]([F:13])([F:42])[F:41])[CH:17]=1)[CH2:7][C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][N:1]=1)=[O:25])([CH3:27])[CH3:28]

Participants

5

Reactant 3

HCID 79752-MethylpyridineHCID 59458920(R)-N-(bis(3-(trifluoromethoxy)phenyl)-methylene)-2-methylpropane-2-sulfinamideHCID 178418339Butyllithium

Product 1

HCID 722910362-methyl-N-(2-(pyridin-2-yl)-1,1-bis(3-(trifluoromethoxy)phenyl)-ethyl)propane-2-sulfinamideYield 48%

Reagents, catalysts & solvents 1

HCID 3283Diethyl EtherSolvent2×

Conditions

Temperature
0 °C

Procedure

2-Picoline (0.20 mL, 2.0 mmol) was stirred in anhydrous Et2O (20 mL) at 0° C. under Argon. nBuLi (2.5 M in hexanes, 0.84 mL, mmol) was added dropwise. The reaction mixture turned to dark brown, and stirred at 0° C. for 20 min, then at room temperature for 1 h. It was cooled back to 0° C., and (R)—N-(bis(3-(trifluoromethoxy)phenyl)-methylene)-2-methylpropane-2-sulfinamide (prepared as described in Example 82, Procedure 11) (0.906 g, 2.0 mmol) in Et2O (4.0 mL) was added dropwise. The mixture was stirred at 0° C. for 1 h. then at room temperature for 1 h. The reaction was quenched by addition of sat'd NH4Cl. EtOAc was added; the organic layer was washed with H2O and brine, dried (Na2SO4), filtered, and concentrated to dryness. The residue was purified by flash chromatography (silica gel, EtOAc/Hexanes=0 to 100%) to give 2-methyl-N-(2-(pyridin-2-yl)-1,1-bis(3-(trifluoromethoxy)phenyl)-ethyl)propane-2-sulfinamide as light tan solids (0.19 g with recovery of 0.59 g of starting material, yield: 48% based on recovery of the starting material). LC-MS (ESI) 547.38 (M+H), retention time=3.90 min (10-90% MeOH in H2O with 0.1% TFA in a 4-min run); 1H NMR (400 MHz, CDCl3) δ ppm 8.36-8.44 (m, 1H), 7.90 (m, 1H), 7.51 (d, J=8.59 Hz, 1H), 7.37 (td, J=7.83, 2.27 Hz, 2H), 7.19-7.24 (m, 2H), 7.11-7.17 (m, 3H), 6.98-7.07 (m, 2H), 6.75 (d, J=7.83 Hz, 1H), 4.15 (d, J=13.90 Hz, 1H), 3.81 (d, J=13.90 Hz, 1H), 1.25-1.33 (m, 9H)

Workup

  1. waitat room temperature for 1 h
  2. temperatureIt was cooled back to 0° C.
  3. stirringThe mixture was stirred at 0° C. for 1 h.
  4. waitat room temperature for 1 h
  5. customThe reaction was quenched by addition of sat'd NH4Cl
  6. additionEtOAc was added
  7. washthe organic layer was washed with H2O and brine
  8. dry with materialdried (Na2SO4)
  9. filtrationfiltered
  10. concentrationconcentrated to dryness
  11. customThe residue was purified by flash chromatography (silica gel, EtOAc/Hexanes=0 to 100%)

Sources & evidence

ORD record
ord-ae18b3ee9c5a47cf8016e1bd18bd2ae0
Source dataset
uspto-grants-2014_02
Patent number
US08642576B2

Reaction notes

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