Sodium Bicarbonate → 4-[4-(1H-imidazol-1-ylmethyl)benzenesulfonyl]-1-[1-(4-pyridyl)piperidin-4-ylmethyl]-2-piperazinone

HRID 2186175Notes

Reaction equation

HRID 2186175 reaction equation
Cl.Cl.[N:3]1([CH2:8][C:9]2[CH:14]=[CH:13][C:12]([S:15]([N:18]3[CH2:23][CH2:22][N:21]([CH2:24][CH:25]4[CH2:30][CH2:29][NH:28][CH2:27][CH2:26]4)[C:20](=[O:31])[CH2:19]3)(=[O:17])=[O:16])=[CH:11][CH:10]=2)[CH:7]=[CH:6][N:5]=[CH:4]1.Cl.Cl[C:34]1[CH:39]=[CH:38][CH:37]=[CH:36][N:35]=1.C(=O)(O)[O-].[Na+]>>[N:3]1([CH2:8][C:9]2[CH:10]=[CH:11][C:12]([S:15]([N:18]3[CH2:23][CH2:22][N:21]([CH2:24][CH:25]4[CH2:30][CH2:29][N:28]([C:38]5[CH:37]=[CH:36][N:35]=[CH:34][CH:39]=5)[CH2:27][CH2:26]4)[C:20](=[O:31])[CH2:19]3)(=[O:16])=[O:17])=[CH:13][CH:14]=2)[CH:7]=[CH:6][N:5]=[CH:4]1

Participants

4

Reactant 3

HCID 516892Sodium BicarbonateHCID 156199202-Chloropyridine--hydrogen chloride (1/1)HCID 234474334-[4-(1H-imidazol-1-ylmethyl)benzenesulfonyl]-1-(piperidin-4-ylmethyl)-2-piperazinone Dihydrochloride

Product 1

HCID 234475814-[4-(1H-imidazol-1-ylmethyl)benzenesulfonyl]-1-[1-(4-pyridyl)piperidin-4-ylmethyl]-2-piperazinoneYield 48.4%

Conditions

Temperature
130 °C

Procedure

A mixture of 4-[4-(1H-imidazol-1-ylmethyl)benzenesulfonyl]-1-(piperidin-4-ylmethyl)-2-piperazinone dihydrochloride (209 mg) and chloropyridine hydrochloride (93 mg) was added to sodium bicarbonate solution, and the mixture was extracted with dichloromethane (twice), dried and concentrated. To the residue was added isoamylalcohol (10 ml), and the mixture was stirred at 130° C. for 15 hours. The reaction solution was concentrated, and the residue was dissolved in dichloromethane. The solution was washed with 1N sodium hydroxide solution, dried and concentrated, and the residue was purified with silica gel column chromatography (dichloromethane:methanol containing 10% ammonia solution=7:1) to give colorless solid of 4-[4-(1H-imidazol-1-ylmethyl)benzenesulfonyl]-1-[1-(4-pyridyl)piperidin-4-ylmethyl]-2-piperazinone (102 mg). The obtained 4-[4-(1H-imidazol-1-ylmethyl)benzenesulfonyl]-1-[1-(4-pyridyl)piperidin-4-ylmethyl]-2-piperazinone was dissolved in ethyl acetate (5 ml), and to the solution was added a solution of 4N hydrochloric acid in ethyl acetate. Precipitates were filtered, washed with ethyl acetate and dried to give colorless solid of the title compound (103 mg).

Workup

  1. extractionthe mixture was extracted with dichloromethane (twice),
  2. customdried
  3. concentrationconcentrated
  4. additionTo the residue was added isoamylalcohol (10 ml)
  5. concentrationThe reaction solution was concentrated
  6. dissolutionthe residue was dissolved in dichloromethane
  7. washThe solution was washed with 1N sodium hydroxide solution
  8. customdried
  9. concentrationconcentrated
  10. customthe residue was purified with silica gel column chromatography (dichloromethane:methanol containing 10% ammonia solution=7:1)

Sources & evidence

ORD record
ord-26b711e162304365b2940ad54fd9e62c
Source dataset
uspto-grants-2002_06
Patent number
US06403595B1

Reaction notes

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