Acetic Acid → HCID 54234952, compound

HRID 343328Notes

Reaction equation

HRID 343328 reaction equation
[CH:1]1(N=C=NC2CCCCC2)CCCC[CH2:2]1.[C:16]([O:20][C:21]([N:23]1[CH2:28][CH:27]=[C:26]([CH3:29])[CH2:25][C@H:24]1[C:30]([OH:32])=[O:31])=[O:22])([CH3:19])([CH3:18])[CH3:17].C(O)C.C(O)(=O)C>CN(C)C1C=CN=CC=1.ClCCl>[CH2:1]([O:31][C:30]([C@@H:24]1[CH2:25][C:26]([CH3:29])=[CH:27][CH2:28][N:23]1[C:21]([O:20][C:16]([CH3:19])([CH3:17])[CH3:18])=[O:22])=[O:32])[CH3:2]

Participants

7

Reactant 4

HCID 176Acetic AcidHCID 702EthanolHCID 10868DicyclohexylcarbodiimideHCID 22885597HCID 22885597, compound

Product 1

HCID 54234952HCID 54234952, compound

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent

Procedure

1,3-Dicyclohexylcarbodiimide (4.3 g, 20.8 mmol) was added to a stirred solution of the product from (f) above (3.35 g, 13.9 mmol), ethanol (4.1 ml, 69.4 mmol) and 4-dimethylaminopyridine (1.7 g, 13.9 mmol) in dichloromethane (40 ml). After 18 hours at room temperature, glacial acetic acid (0.4 ml) was added and the reaction mixture stirred for a further 0.5 hour before being filtered. The residue obtained by evaporation of the filtrate under reduced pressure was partitioned between ether and water, then the organic phase washed successively with 1M aqueous citric acid solution, saturated aqueous sodium bicarbonate solution and saturated brine, dried (MgSO4) and evaporated under reduced pressure to give an oil (5.15 g), which was purified by chromatography on silica gel, using hexane:ether (4:1) as eluent, to furnish the required product (3.4 g) as a clear oil. Rf 0.30 (SS 4). m/e 270 (M+H)+.

Workup

  1. filtrationbefore being filtered
  2. customThe residue obtained by evaporation of the filtrate under reduced pressure
  3. customwas partitioned between ether and water
  4. washthe organic phase washed successively with 1M aqueous citric acid solution, saturated aqueous sodium bicarbonate solution and saturated brine
  5. dry with materialdried (MgSO4)
  6. customevaporated under reduced pressure

Sources & evidence

ORD record
ord-9b8f7ac30c2241eaa0fbefa230278e6a
Source dataset
uspto-grants-1999_01
Patent number
US05861393

Reaction notes

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