Dicyclohexylcarbodiimide → (2-acetyl-phenylamino)-phenyl-acetic acid (R)-(1-aza-bicyclo[2.2.2]oct-3-yl)ester

HRID 1255029Notes

Reaction equation

HRID 1255029 reaction equation
C1CCC(N=C=NC2CCCCC2)CC1.Cl.[C:17]([C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][C:21]=1[NH:26][CH:27]([C:31]1[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=1)[C:28]([OH:30])=[O:29])(=[O:19])[CH3:18].C1C=CC2N(O)N=NC=2C=1.[N:47]12[CH2:54][CH2:53][CH:50]([CH2:51][CH2:52]1)[C@@H:49](O)[CH2:48]2>C1COCC1>[N:47]12[CH2:54][CH2:53][CH:50]([CH2:51][CH2:52]1)[C@@H:49]([O:29][C:28](=[O:30])[CH:27]([NH:26][C:21]1[CH:22]=[CH:23][CH:24]=[CH:25][C:20]=1[C:17](=[O:19])[CH3:18])[C:31]1[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=1)[CH2:48]2

Participants

6

Reactant 4

HCID 10868DicyclohexylcarbodiimideHCID 757711-HydroxybenzotriazoleHCID 914043-Quinuclidinol, (-)-HCID 67424703(2-Acetyl-phenylamino)-phenyl-acetic acid hydrochloride

Product 1

HCID 46840711(2-acetyl-phenylamino)-phenyl-acetic acid (R)-(1-aza-bicyclo[2.2.2]oct-3-yl)esterYield 107%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

PS-DCC (890 mg, 1.184 mmol, loading: 1.33 mmol/g) is suspended in dry THF (10 mL). (2-Acetyl-phenylamino)-phenyl-acetic acid hydrochloride (I63) (181 mg, 0.59 mmol), HOBt (181 mg, 1.18 mmol), and (R)-quinuclidin-3-ol (226 mg, 1.78 mmol) are added and the mixture is shaken at RT overnight. PS-DCC is filtered off and the filtrate is evaporated. The residue is dissolved in EtOAc and washed with sat. NaHCO3, water and brine, dried over Na2SO4, filtered and evaporated. The resulting crude oil is purified by flash chromatography (DCM/MeOH=9/1) to afford the title compound as a colorless oil (239 mg, quantitative yield, mixture of diastereoisomers).

Workup

  1. filtrationPS-DCC is filtered off
  2. customthe filtrate is evaporated
  3. dissolutionThe residue is dissolved in EtOAc
  4. washwashed with sat. NaHCO3, water and brine
  5. dry with materialdried over Na2SO4
  6. filtrationfiltered
  7. customevaporated
  8. customThe resulting crude oil is purified by flash chromatography (DCM/MeOH=9/1)

Sources & evidence

ORD record
ord-c9cff036e205483fab009f36971b5205
Source dataset
uspto-grants-2013_06
Patent number
US08455646B2

Reaction notes

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