Potassium Phosphate, Tribasic → HCID 67115899, compound

HRID 1695861Notes

Reaction equation

HRID 1695861 reaction equation
[C:1]([O:4][C@H:5]1[C@H:10]([O:11][C:12](=[O:14])[CH3:13])[C@@H:9]([O:15][C:16](=[O:18])[CH3:17])[CH:8]([C:19]2[CH:24]=[CH:23][C:22](Br)=[C:21]([CH2:26][C:27]3[CH:36]=[CH:35][C:30]4[O:31][CH2:32][CH2:33][O:34][C:29]=4[CH:28]=3)[CH:20]=2)[O:7][C@@H:6]1[CH2:37][O:38][C:39](=[O:41])[CH3:40])(=[O:3])[CH3:2].[CH:42]1(P(C2CCCCC2)C2CCCCC2)CCCC[CH2:43]1.[O-]P([O-])([O-])=O.[K+].[K+].[K+].C(B(O)O)C>C1(C)C=CC=CC=1.O.C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[C:1]([O:4][C@H:5]1[C@H:10]([O:11][C:12](=[O:14])[CH3:13])[C@@H:9]([O:15][C:16](=[O:18])[CH3:17])[CH:8]([C:19]2[CH:24]=[CH:23][C:22]([CH2:42][CH3:43])=[C:21]([CH2:26][C:27]3[CH:36]=[CH:35][C:30]4[O:31][CH2:32][CH2:33][O:34][C:29]=4[CH:28]=3)[CH:20]=2)[O:7][C@@H:6]1[CH2:37][O:38][C:39](=[O:41])[CH3:40])(=[O:3])[CH3:2]

Participants

8

Reactant 4

HCID 62657Potassium Phosphate, TribasicHCID 75806TricyclohexylphosphineHCID 521157Ethylboronic acidHCID 67115778HCID 67115778, compound

Product 1

HCID 67115899HCID 67115899, compoundYield 146.9%

Reagents, catalysts & solvents 3

HCID 167845palladium(II) acetateCatalystHCID 962WaterSolvent2×HCID 1140TolueneSolvent

Procedure

To a stirred solution of acetic acid (2R,3R,4R,5S)-3,4,5-triacetoxy-6-[4-bromo-3-(2,3-dihydro-benzo[1,4]dioxin-6-ylmethyl)-phenyl]-tetrahydro-pyran-2-ylmethyl ester (10.0 g, 15.74 mmol) in toluene (200 mL) was added tricyclohexylphosphine (1.76 g, 6.29 mmol), a solution of potassium phosphate tribasic (13.3 g, 62.9 mmol) in water (15 mL), and ethylboronic acid (3.4 g, 47.2 mmol. The reaction mixture was degassed for 45 min then palladium (II) acetate (529 mg, 2.3 mmol) was added. After refluxing overnight, the reaction mixture was cooled to room temperature, and water was added. The resulting mixture was extracted with ethyl acetate, (2×200 mL), washed with water and brine, then dried over sodium sulfate, concentrated and purified by column chromatography to furnish acetic acid (2R,3R,4R,5S)-3,4,5-triacetoxy-6-[3-(2,3-dihydro-benzo[1,4]dioxin-6-ylmethyl)-4-ethyl-phenyl]-tetrahydro-pyran-2-ylmethyl ester (5.4 g).

Workup

  1. customThe reaction mixture was degassed for 45 min
  2. temperatureAfter refluxing overnight
  3. extractionThe resulting mixture was extracted with ethyl acetate, (2×200 mL),
  4. washwashed with water and brine
  5. dry with materialdried over sodium sulfate
  6. concentrationconcentrated
  7. custompurified by column chromatography

Sources & evidence

ORD record
ord-92bc9bb966ec47c190daee6b1912aad8
Source dataset
uspto-grants-2012_04
Patent number
US08163704B2

Reaction notes

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