Pyridine → (+/-)-2-Acetoxy-5-(p-Toluenesulfonyloxymethyl)-Tetrahydrofuran

HRID 481721Notes

Reaction equation

HRID 481721 reaction equation
[OH:1][CH:2]1[CH2:6][CH2:5][CH:4]([CH2:7][O:8][S:9]([C:12]2[CH:17]=[CH:16][C:15]([CH3:18])=[CH:14][CH:13]=2)(=[O:11])=[O:10])[O:3]1.N1C=CC=CC=1.[C:25](OC(=O)C)(=[O:27])[CH3:26]>CN(C1C=CN=CC=1)C.C(Cl)Cl>[C:25]([O:1][CH:2]1[CH2:6][CH2:5][CH:4]([CH2:7][O:8][S:9]([C:12]2[CH:13]=[CH:14][C:15]([CH3:18])=[CH:16][CH:17]=2)(=[O:11])=[O:10])[O:3]1)(=[O:27])[CH3:26]

Participants

6

Reactant 3

HCID 1049PyridineHCID 7918Acetic AnhydrideHCID 21255848(+/-)2-Hydroxy-5-(p-Toluenesulfonyloxymethyl)-Tetrahydrofuran

Product 1

HCID 21255879(+/-)-2-Acetoxy-5-(p-Toluenesulfonyloxymethyl)-Tetrahydrofuran

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent

Procedure

To a stirring solution of (±)2-hydroxy-5-(p-toluenesulfonyloxymethyl)-tetrahydrofuran (example 58) (4.20 g, 15.44 mmol), pyridine (2.75 mL, 33.97 mmol) and DMAP (catalytic) in methylene chloride (100 mL) at rt was added acetic anhydride (2.91 mL, 30.88 mmol). After stirring the solution for 1 h, it was washed with water (50 mL), 1N HCl (50 mL), saturated NaHCO3 (50 mL), dried (MgSO4) and concentrated to give the title compound as a 1:1 mixture of cis and trans isomers (4.85 g, 100%).

Workup

  1. washit was washed with water (50 mL), 1N HCl (50 mL), saturated NaHCO3 (50 mL)
  2. dry with materialdried (MgSO4)
  3. concentrationconcentrated

Sources & evidence

ORD record
ord-55ebae5508f34ba689bf65aae40efe6a
Source dataset
uspto-grants-1998_08
Patent number
US05789394

Reaction notes

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