Ammonium Hydroxide → 1-(4-(3,5-Dimethyl-2,4'-bipyridin-2'-yl)piperazin-1-yl)-3-(methylsulfonyl)propan-1-one

HRID 2172861Notes

Reaction equation

HRID 2172861 reaction equation
Cl[C:2]1[C:3]([C:22]2[C:27]([CH3:28])=[CH:26][C:25]([CH3:29])=[CH:24][N:23]=2)=[CH:4][C:5]([N:8]2[CH2:13][CH2:12][N:11]([C:14](=[O:21])[CH2:15][CH2:16][S:17]([CH3:20])(=[O:19])=[O:18])[CH2:10][CH2:9]2)=[N:6][CH:7]=1.[NH4+].[OH-]>[Pd].CO.O>[CH3:28][C:27]1[C:22]([C:3]2[CH:2]=[CH:7][N:6]=[C:5]([N:8]3[CH2:9][CH2:10][N:11]([C:14](=[O:21])[CH2:15][CH2:16][S:17]([CH3:20])(=[O:18])=[O:19])[CH2:12][CH2:13]3)[CH:4]=2)=[N:23][CH:24]=[C:25]([CH3:29])[CH:26]=1

Participants

5

Reactant 2

HCID 14923Ammonium HydroxideHCID 569562401-(4-(5'-Chloro-3,5-dimethyl-2,4'-bipyridin-2'-yl)piperazin-1-yl)-3-(methylsulfonyl)propan-1-one

Product 1

HCID 569675951-(4-(3,5-Dimethyl-2,4'-bipyridin-2'-yl)piperazin-1-yl)-3-(methylsulfonyl)propan-1-oneYield 90%

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 22242641Methanol--water (1/1)Solvent

Conditions

Temperature
25 °C

Procedure

To 1-[4-(5′-chloro-3,5-dimethyl-2,4′-bipyridin-2′-yl)piperazin-1-yl]-3-(methylsulfonyl)propan-1-one (44 mg, 0.10 mmol) was added MeOH/Water 6:1 (5 mL, 0.02M), then 10% Pd/C (25 μL=20 w/w % relative to substrate) followed by NH4OH (1.0 mL, 5 eq, 0.5M solution in MeOH). The reaction of mixture was stirred at ambient temperature at 25° C. under balloon H2 for 12 hrs. After filtering off catalyst through celite, the concentrated crude product was diluted with EtOAc (25 mL), washed with water (10 mL), then brine (10 mL), dried over MgSO4, filtered. The solution was concentrated in vacuo. The residue was purified by chromatography on silica gel (EtOAc/heptane=1:3) to give the title compound (36 mg, 90%) as a yellow solid. 1H NMR (400 MHz, CDCl3) δ ppm 8.36 (s, 1 H) 8.24-8.29 (m, 1 H) 7.42 (s, 1 H) 6.79-6.84 (m, 2 H) 3.75-3.81 (m, 4 H) 3.58-3.66 (m, 4 H) 3.47 (t, J=7.33 Hz, 2 H) 3.00 (s, 3H) 2.93-2.99 (m, 2 H) 2.37 (s, 3 H) 2.33 (s, 3 H); m/z for C20H26N4O3S 403.1 (M+H)+.

Workup

  1. customThe reaction of mixture
  2. filtrationAfter filtering off catalyst through celite
  3. concentrationthe concentrated crude product
  4. additionwas diluted with EtOAc (25 mL)
  5. washwashed with water (10 mL)
  6. dry with materialbrine (10 mL), dried over MgSO4
  7. filtrationfiltered
  8. concentrationThe solution was concentrated in vacuo
  9. customThe residue was purified by chromatography on silica gel (EtOAc/heptane=1:3)

Sources & evidence

ORD record
ord-a1bef6ae940049f78190d675abecf002
Source dataset
uspto-grants-2015_06
Patent number
US09056865B2

Reaction notes

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