1-[2-Methyl-5-(methyloxy)-4-nitrophenyl]-4-[2-(methylsulfonyl)ethyl]piperidine → 5-Methyl-2-(methyloxy)-4-{4-[2-(methylsulfonyl)ethyl]-1-piperidinyl}aniline

HRID 419620Notes

Reaction equation

HRID 419620 reaction equation
[CH3:1][C:2]1[CH:7]=[C:6]([N+:8]([O-])=O)[C:5]([O:11][CH3:12])=[CH:4][C:3]=1[N:13]1[CH2:18][CH2:17][CH:16]([CH2:19][CH2:20][S:21]([CH3:24])(=[O:23])=[O:22])[CH2:15][CH2:14]1>CCOC(C)=O.CO.[Pt]>[CH3:1][C:2]1[C:3]([N:13]2[CH2:18][CH2:17][CH:16]([CH2:19][CH2:20][S:21]([CH3:24])(=[O:22])=[O:23])[CH2:15][CH2:14]2)=[CH:4][C:5]([O:11][CH3:12])=[C:6]([CH:7]=1)[NH2:8]

Participants

5

Reactant 1

HCID 594526541-[2-Methyl-5-(methyloxy)-4-nitrophenyl]-4-[2-(methylsulfonyl)ethyl]piperidine

Product 1

HCID 594526535-Methyl-2-(methyloxy)-4-{4-[2-(methylsulfonyl)ethyl]-1-piperidinyl}anilineYield 83.6%

Reagents, catalysts & solvents 3

HCID 23939PlatinumCatalystHCID 887MethanolSolventHCID 8857Ethyl AcetateSolvent2×

Procedure

To 1-[2-methyl-5-(methyloxy)-4-nitrophenyl]-4-[2-(methylsulfonyl)ethyl]piperidine (26 g, 73 mmol) in EtOAc (1 L) and MeOH (200 mL) was added platinum on carbon (sulfided) (14 g, 73 mmol) as a slurry in EtOAc (100 mL). The mixture was stirred under H2 (1 atm.) for 2 days. The catalyst was filtered off and rinsed with EtOAc, MeOH, and DCM and the filtrate was rotovapped down. The resultant solid was triturated with diethyl ether to provide the title compound of Step J (20 g, 61 mmol, 82%). 1H NMR (400 MHz, DMSO-d6) δ 6.50 (s, 1H), 6.39 (s, 1H), 4.24 (s, 2H), 3.66 (s, 3H), 3.05-3.16 (m, 2H), 2.92 (s, 3H), 2.83 (d, 2H), 2.39-2.54 (m, 2H), 2.01 (s, 3H), 1.55-1.76 (m, 4H), 1.32-1.46 (m, J=10.6, 7.0, 3.5, 3.5 Hz, 1H), 1.24 (qd, J=11.7, 3.4 Hz, 2H).

Workup

  1. filtrationThe catalyst was filtered off
  2. washrinsed with EtOAc, MeOH, and DCM
  3. customThe resultant solid was triturated with diethyl ether

Sources & evidence

ORD record
ord-2ccbf6c6501c4bafbee435c19c3af6e4
Source dataset
uspto-grants-2012_01
Patent number
US08093239B2

Reaction notes

Loading…