Citric Acid → HCID 21967943, compound

HRID 1003936Notes

Reaction equation

HRID 1003936 reaction equation
[O:1]1[CH:5]=[CH:4][C:3]2[CH:6]=[C:7]([CH2:10][CH2:11][C:12]([C:14]3[C:19]([O:20][CH2:21][CH:22]=[CH2:23])=[CH:18][C:17]([CH3:24])=[CH:16][C:15]=3[O:25][C@@H:26]3[O:34][C@H:33]([CH2:35][OH:36])[C@@H:31]([OH:32])[C@H:29]([OH:30])[C@H:27]3[OH:28])=[O:13])[CH:8]=[CH:9][C:2]1=2.C(=O)=O.CC(C)=O.Cl[C:45]([O:47][CH3:48])=[O:46].C(O)(=O)CC(CC(O)=O)(C(O)=O)O>N1C(C)=CC(C)=CC=1C.ClCCl>[O:1]1[CH:5]=[CH:4][C:3]2[CH:6]=[C:7]([CH2:10][CH2:11][C:12]([C:14]3[C:19]([O:20][CH2:21][CH:22]=[CH2:23])=[CH:18][C:17]([CH3:24])=[CH:16][C:15]=3[O:25][C@@H:26]3[O:34][C@H:33]([CH2:35][O:36][C:45]([O:47][CH3:48])=[O:46])[C@@H:31]([OH:32])[C@H:29]([OH:30])[C@H:27]3[OH:28])=[O:13])[CH:8]=[CH:9][C:2]1=2

Participants

7

Reactant 4

HCID 311Citric AcidHCID 6586Methyl chloroformateHCID 10601391HCID 10601391, compoundHCID 18522661Acetone cardice

Product 1

HCID 21967943HCID 21967943, compoundYield 87.2%

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 79532,4,6-TrimethylpyridineSolvent

Procedure

3-(5-Benzo[b]furanyl)-2'-(β-D-glucopyranosyloxy)-6'-allyloxy-4'-methylpropiophenone (500 mg) is dissolved in 2,4,6-collidine (5 ml), and the mixture is cooled to 40° C. with dry ice-acetone, and thereto is added dropwise a solution of methyl chloroformate (114 mg) in dichloromethane (0.5 ml) with stirring. The mixture is stirred at 40° C. for one hour, and stirred at room temperature for 1.5 hour. The reaction mixture is poured into cold 10% aqueous citric acid solution, and the mixture is extracted with ethyl acetate. The organic layer is washed with water, dried, and concentrated under reduced pressure. The resulting residue is purified by silica gel column chromatography (solvent; chloroform/methanol) to give 3-(5-benzo[b]furanyl)-2'-(6-O-methoxycarbonyl-β-D-glucopyranosyloxy)-6'-allyloxy-4'-methylpropiophenone (487 mg).

Workup

  1. stirringThe mixture is stirred at 40° C. for one hour
  2. stirringstirred at room temperature for 1.5 hour
  3. extractionthe mixture is extracted with ethyl acetate
  4. washThe organic layer is washed with water
  5. customdried
  6. concentrationconcentrated under reduced pressure
  7. customThe resulting residue is purified by silica gel column chromatography (solvent; chloroform/methanol)

Sources & evidence

ORD record
ord-2e55ee8970be49a6a8b07a7ae20e825a
Source dataset
uspto-grants-2000_04
Patent number
US06048842

Reaction notes

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