Triethylamine → 1-[[(4-Benzoyl-1-piperazinyl)carbonyl]amino]cyclohexanecarboxylic acid phenylmethyl ester

HRID 1851806Notes

Reaction equation

HRID 1851806 reaction equation
[C:1]1([CH2:7][O:8][C:9]([C:11]2([NH2:17])[CH2:16][CH2:15][CH2:14][CH2:13][CH2:12]2)=[O:10])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[C:18](OC(OC(C)(C)C)=O)(OC(C)(C)C)=[O:19].C(N(CC)CC)C.[C:40]([N:48]1[CH2:53][CH2:52][NH:51][CH2:50][CH2:49]1)(=[O:47])[C:41]1[CH:46]=[CH:45][CH:44]=[CH:43][CH:42]=1>C(Cl)Cl>[C:1]1([CH2:7][O:8][C:9]([C:11]2([NH:17][C:18]([N:51]3[CH2:52][CH2:53][N:48]([C:40](=[O:47])[C:41]4[CH:46]=[CH:45][CH:44]=[CH:43][CH:42]=4)[CH2:49][CH2:50]3)=[O:19])[CH2:12][CH2:13][CH2:14][CH2:15][CH2:16]2)=[O:10])[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 90495Di-tert-butyl dicarbonateHCID 7626541-BenzoylpiperazineHCID 15176238Benzyl 1-aminocyclohexanecarboxylate

Product 1

HCID 576729161-[[(4-Benzoyl-1-piperazinyl)carbonyl]amino]cyclohexanecarboxylic acid phenylmethyl esterYield 86.1%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent3×

Procedure

A solution of 114 mg (0.9 mmol) of N,N-dimethylaminopyridine and 2.17 g (9.3 mmol) of 1-aminocyclohexanecarboxylic acid phenylmethyl ester in methylene chloride was added to a solution of 2.03 g (9.3 mmol) of di-t-butyl dicarbonate in 60 ml of methylene chloride, and the mixture was stirred at room temperature for 30 minutes. Thereafter, a solution of 1.88 g (18.6 mmol) of triethylamine and 1.86 g (9.8 mmol) of 1-(benzoyl)piperazine in methylene chloride was added thereto, and the mixture was stirred at room temperature overnight. After the reaction solution was concentrated, the residue was dissolved in ethyl acetate and successively washed with water, a 10% aqueous potassium hydrogensulfate solution, a saturated aqueous sodium hydrogencarbonate solution and saturated brine, followed by drying with anhydrous sodium sulfate. After the solvent was distilled off under reduced pressure, the obtained crystal was washed with diethyl ether to give 3.60 g (86%) of the title compound.

Workup

  1. stirringthe mixture was stirred at room temperature overnight
  2. concentrationAfter the reaction solution was concentrated
  3. dissolutionthe residue was dissolved in ethyl acetate
  4. washsuccessively washed with water
  5. dry with materialby drying with anhydrous sodium sulfate
  6. distillationAfter the solvent was distilled off under reduced pressure
  7. washthe obtained crystal was washed with diethyl ether

Sources & evidence

ORD record
ord-7f75b671cdab4737b14ef2aff8cf236a
Source dataset
uspto-grants-2015_02
Patent number
US08957205B2

Reaction notes

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