Acetic Acid → 3-Chloro-2-(4-{3-[5-methanesulfonyl-3-(4-trifluoromethyl-phenyl)-4,5,6,7-tetrahydro-pyrazolo[4,3-c]pyridin-1-yl]-propyl}-piperazin-1-yl)-phenylamine

HRID 2055797Notes

Reaction equation

HRID 2055797 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([N+:8]([O-])=O)[C:3]=1[N:11]1[CH2:16][CH2:15][N:14]([CH2:17][CH2:18][CH2:19][N:20]2[C:28]3[CH2:27][CH2:26][N:25]([S:29]([CH3:32])(=[O:31])=[O:30])[CH2:24][C:23]=3[C:22]([C:33]3[CH:38]=[CH:37][C:36]([C:39]([F:42])([F:41])[F:40])=[CH:35][CH:34]=3)=[N:21]2)[CH2:13][CH2:12]1.C(O)(=O)C>CCO.[Zn]>[Cl:1][C:2]1[C:3]([N:11]2[CH2:16][CH2:15][N:14]([CH2:17][CH2:18][CH2:19][N:20]3[C:28]4[CH2:27][CH2:26][N:25]([S:29]([CH3:32])(=[O:30])=[O:31])[CH2:24][C:23]=4[C:22]([C:33]4[CH:34]=[CH:35][C:36]([C:39]([F:40])([F:41])[F:42])=[CH:37][CH:38]=4)=[N:21]3)[CH2:13][CH2:12]2)=[C:4]([NH2:8])[CH:5]=[CH:6][CH:7]=1

Participants

5

Reactant 2

HCID 176Acetic AcidHCID 179754011-{3-[4-(2-chloro-6-nitro-phenyl)-piperazin-1-yl]-propyl}-5-methanesulfonyl-3-(4-trifluoromethyl-phenyl)-4,5,6,7-tetrahydro-1H-pyrazolo[4,3-c]pyridine

Product 1

HCID 102107373-Chloro-2-(4-{3-[5-methanesulfonyl-3-(4-trifluoromethyl-phenyl)-4,5,6,7-tetrahydro-pyrazolo[4,3-c]pyridin-1-yl]-propyl}-piperazin-1-yl)-phenylamineYield 100.2%

Reagents, catalysts & solvents 2

HCID 23994ZincCatalystHCID 702EthanolSolvent

Procedure

To a stirred solution of 1-{3-[4-(2-chloro-6-nitro-phenyl)-piperazin-1-yl]-propyl}-5-methanesulfonyl-3-(4-trifluoromethyl-phenyl)-4,5,6,7-tetrahydro-1H-pyrazolo[4,3-c]pyridine (0.153 g, 0.244 mmol) in EtOH (2.44 mL) was added zinc dust (0.80 mg, 1.22 mmol) and slow addition of acetic acid (0.70 mL). After 15 min the yellow solution became colorless and the access zinc dust was filtered through a plug of celite. The filtrate was concentrated and the residue was purified by column chromatography (silica, 0-10% MeOH/CH2Cl2) to afford 3-chloro-2-(4-{3-[5-methanesulfonyl-3-(4-trifluoromethyl-phenyl)-4,5,6,7-tetrahydro-pyrazolo[4,3-c]pyridin-1-yl]-propyl}-piperazin-1-yl)-phenylamine (0.146 g, 100%). MS (electrospray): exact mass calculated for C27H32CIF3N6O2S, 596.2; m/z found, 597.2 [M+H]+. 1H NMR (400 MHz, CDCl3): 7.73 (d, J=8.2 Hz, 2H), 7.66 (d, J=8.2 Hz, 2H), 6.88 (t, J=8.2 Hz, 1H), 6.63 (t, J=7.6 Hz, 2H), 4.55 (s, 2H), 4.36 (s, 2H), 4.15 (t, J=6.5 Hz, 2H), 3.60-3.70 (m, 4H), 2.97 (t, J=5.3 Hz, 2H), 2.90 (s, 3H), 2.83 (d, J=10.8 Hz, 2H), 2.74 (d, J=11.5 Hz, 2H), 2.37 (t, J=6.6 Hz, 2H), 2.11-2.20 (m, 4H).

Workup

  1. filtrationthe access zinc dust was filtered through a plug of celite
  2. concentrationThe filtrate was concentrated
  3. customthe residue was purified by column chromatography (silica, 0-10% MeOH/CH2Cl2)

Sources & evidence

ORD record
ord-8ee8c87f9e80419090d5abba1435eae3
Source dataset
uspto-grants-2008_02
Patent number
US07332494B2

Reaction notes

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