Sodium Chloride → 1-[1-[1-(diphenylmethyl)azetidin-3-yl]piperidin-4-yl]-1,3-dihydro-2H-benzimidazol-2-one

HRID 47532

Reaction equation

HRID 47532 reaction equation
[NH:1]1[CH2:6][CH2:5][CH:4]([N:7]2[C:11]3[CH:12]=[CH:13][CH:14]=[CH:15][C:10]=3[NH:9][C:8]2=[O:16])[CH2:3][CH2:2]1.[C:17]1([CH:23]([C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=2)[N:24]2[CH2:27][CH2:26][C:25]2=O)[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1.C([BH3-])#N.[Na+].C(=O)([O-])O.[Na+].[Cl-].[Na+]>CO.[Cl-].[Zn+2].[Cl-]>[C:17]1([CH:23]([C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=2)[N:24]2[CH2:27][CH:26]([N:1]3[CH2:2][CH2:3][CH:4]([N:7]4[C:11]5[CH:12]=[CH:13][CH:14]=[CH:15][C:10]=5[NH:9][C:8]4=[O:16])[CH2:5][CH2:6]3)[CH2:25]2)[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=1

Participants

8

Reactant 5

HCID 5234Sodium ChlorideHCID 886381,3-Dihydro-1-(4-piperidinyl)-2H-benzimidazol-2-oneHCID 516892Sodium BicarbonateHCID 5003444Sodium cyanoborohydrideHCID 123767241-(Diphenylmethyl)azetidin-2-one

Product 1

HCID 227452971-[1-[1-(diphenylmethyl)azetidin-3-yl]piperidin-4-yl]-1,3-dihydro-2H-benzimidazol-2-oneYield 133.1%

Reagents, catalysts & solvents 2

HCID 3007855ZincchlorideCatalystHCID 887MethanolSolvent

Procedure

In 7 ml of methanol, 217 mg of 1-(piperidin-4-yl)-1,3-dihydro-2H-benzimidazol-2-one, 300 mg of 1-(diphenylmethyl)azetidin-2-one, 94 mg of sodium cyanoborohydride and 102 mg of zinc chloride were dissolved and stirred overnight. The reaction liquid was added to a saturated aqueous solution of sodium hydrogencarbonate to which sodium chloride had been added, and extracted with ethyl acetate. The extract was washed with saturated brine, dried over sodium sulfate and concentrated. Thus obtained residue was purified by silica gel column chromatography (chloroform, chloroform/methanol=50/1) to provide 583 mg of crude 1-[1-[1-(diphenylmethyl)azetidin-3-yl]piperidin-4-yl]-1,3-dihydro-2H-benzimidazol-2-one.

Workup

  1. customThe reaction liquid
  2. additionhad been added
  3. extractionextracted with ethyl acetate
  4. washThe extract was washed with saturated brine
  5. dry with materialdried over sodium sulfate
  6. concentrationconcentrated
  7. customThus obtained residue was purified by silica gel column chromatography (chloroform, chloroform/methanol=50/1)

Sources & evidence

ORD record
ord-072b9e6c020c4bfc94d9868adebbc4c0
Source dataset
uspto-grants-2004_03
Patent number
US06699880B1

Linked notes

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