Dicyclohexylcarbodiimide → (R)-((R)-quinuclidin-3-yl) 2-(tert-butoxycarbonylamino)-2-phenylacetate

HRID 1619500Notes

Reaction equation

HRID 1619500 reaction equation
[C:1]([O:5][C:6]([NH:8][C@H:9]([C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1)[C:10]([OH:12])=[O:11])=[O:7])([CH3:4])([CH3:3])[CH3:2].[N:19]12[CH2:26][CH2:25][CH:22]([CH2:23][CH2:24]1)[C@@H:21](O)[CH2:20]2.N1(O)C2C=CC=CC=2N=N1.C1CCC(N=C=NC2CCCCC2)CC1>>[C:1]([O:5][C:6]([NH:8][C@H:9]([C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1)[C:10]([O:12][C@@H:21]1[CH:22]2[CH2:25][CH2:26][N:19]([CH2:24][CH2:23]2)[CH2:20]1)=[O:11])=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

5

Reactant 4

HCID 10868DicyclohexylcarbodiimideHCID 757711-HydroxybenzotriazoleHCID 914043-Quinuclidinol, (-)-HCID 2755953(2R)-2-{[(tert-butoxy)carbonyl]amino}-2-phenylacetic acid

Product 1

HCID 67607970(R)-((R)-quinuclidin-3-yl) 2-(tert-butoxycarbonylamino)-2-phenylacetateYield 43%

Procedure

A mixture of (R)-2-(tert-butoxycarbonylamino)-2-phenylacetic acid (1.00 g, 3.98 mmol), (R)-quinuclidin-3-ol (0.51 g, 3.98 mmol), 1H-benzo[d][1,2,3]triazol-1-ol (0.64 g, 4.78 mmol), and DCC (0.98 g, 4.78 mmol) was stirred at RT overnight. Then THF was removed by vacuum, and the residue was partitioned between EtOAc and 2M K2CO3. The organic phase was dried over Na2SO4, filtered, and evaporated to dryness. The crude was purified by flash chromatography (DCM/MeOH=98/2 to 95/5) to obtain (R)—((R)-quinuclidin-3-yl) 2-(tert-butoxycarbonylamino)-2-phenylacetate (612 mg; 43% yield).

Workup

  1. customThen THF was removed by vacuum
  2. customthe residue was partitioned between EtOAc and 2M K2CO3
  3. dry with materialThe organic phase was dried over Na2SO4
  4. filtrationfiltered
  5. customevaporated to dryness
  6. customThe crude was purified by flash chromatography (DCM/MeOH=98/2 to 95/5)

Sources & evidence

ORD record
ord-4c8f3de49e81423fb1dea33ab387260d
Source dataset
uspto-grants-2014_07
Patent number
US08772314B2

Reaction notes

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