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Triethylamine → 1-[1-(1-(tert-butoxycarbonyl)piperidin-4-yl)piperidin-4-yl]-3-(methylsulfonyl)-1,3-dihydro-2H-benzimidazol-2-one

HRID 47535
Notes
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Reaction equation

HRID 47535 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([N:14]2[CH2:19][CH2:18][CH:17]([N:20]3[C:24]4[CH:25]=[CH:26][CH:27]=[CH:28][C:23]=4[NH:22][C:21]3=[O:29])[CH2:16][CH2:15]2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].C(N(CC)CC)C.[CH3:37][S:38](Cl)(=[O:40])=[O:39].C(=O)([O-])O.[Na+]>C(Cl)(Cl)Cl>[C:1]([O:5][C:6]([N:8]1[CH2:9][CH2:10][CH:11]([N:14]2[CH2:15][CH2:16][CH:17]([N:20]3[C:24]4[CH:25]=[CH:26][CH:27]=[CH:28][C:23]=4[N:22]([S:38]([CH3:37])(=[O:40])=[O:39])[C:21]3=[O:29])[CH2:18][CH2:19]2)[CH2:12][CH2:13]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 31297Methanesulfonyl chlorideHCID 516892Sodium BicarbonateHCID 15839551HCID 15839551, compound

Product 1

HCID 227453061-[1-(1-(tert-butoxycarbonyl)piperidin-4-yl)piperidin-4-yl]-3-(methylsulfonyl)-1,3-dihydro-2H-benzimidazol-2-one

Reagents, catalysts & solvents 1

HCID 6212
Chloroform
Solvent

Procedure

One (1) g of 1-[1-(1-(tert-butoxycarbonyl)piperidin-4-yl)-piperidin-4-yl]-1,3-dihydro-2H-benzimidazol-2-one (cf. International Publication WO 96/13262) and 0.53 ml of triethylamine were suspended in 30 ml of chloroform. To the suspension 0.29 ml of methanesulfonyl chloride was added, followed by 2 hours' stirring at room temperature. Saturated aqueous sodium hydrogencarbonate solution was added to the reaction liquid, which was then extracted with chloroform. The extract was dried over sodium sulfate, concentrated, and the resulting residue was purified by silica gel column chromatography (chloroform, chloroform/methanol=19/1) to give 860 mg of 1-[1-(1-(tert-butoxycarbonyl)piperidin-4-yl)piperidin-4-yl]-3-(methylsulfonyl)-1,3-dihydro-2H-benzimidazol-2-one. The product was dissolved in 25 ml of trifluoroacetic acid, stirred for 30 minutes at room temperature and then the trifluoroacetic acid was distilled off. To the residue ether and chloroform were added and whereby obtained crystals were recovered by filtration, to give 860 mg of the title compound.

Workup

  1. extractionwas then extracted with chloroform
  2. dry with materialThe extract was dried over sodium sulfate
  3. concentrationconcentrated
  4. customthe resulting residue was purified by silica gel column chromatography (chloroform, chloroform/methanol=19/1)

Sources & evidence

ORD record
ord-091081c242494cbcb6af9e3eeff35824
Source dataset
uspto-grants-2004_03
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US06699880B1

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes