3,4-dihydro-2H-pyran → HCID 15482800, compound

HRID 1969379Notes

Reaction equation

HRID 1969379 reaction equation
[OH:1][CH2:2][C@H:3]1[O:7][C:6](=[O:8])[CH2:5][CH2:4]1.[O:9]1[CH:14]=[CH:13][CH2:12][CH2:11][CH2:10]1.CC1C=CC(S([O-])(=O)=O)=CC=1.C1C=C[NH+]=CC=1>C(Cl)Cl>[O:9]1[CH2:14][CH2:13][CH2:12][CH2:11][CH:10]1[O:1][CH2:2][C@H:3]1[O:7][C:6](=[O:8])[CH2:5][CH2:4]1

Participants

5

Reactant 3

HCID 80803,4-dihydro-2H-pyranHCID 466102Benzenesulfonic acid, 4-methyl-, compd. with pyridine (1:1)HCID 2733813(S)-(+)-gamma-Hydroxymethyl-gamma-butyrolactone

Product 1

HCID 15482800HCID 15482800, compoundYield 88.1%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a mixture of (S)-5-(hydroxymethyl)-dihydrofuran-2(3H)-one (1.78 g, 0.0153 mol) and 3,4-dihydro-2H-pyran (2.62 g, 0.0312 mol, Alfa) in 40 mL of CH2Cl2 was added PPTS (0.391 g, 0.00156 mol, Aldrich) slowly. After stirring at rt overnight, the reaction mixture was quenched with 5 mL of water. The mixture was extracted with EtOAc (50 mL×2). The combined organic phases were dried over Na2SO4 and concentrated in vacuo to give pale yellow oil. The crude product was purified by a silica gel column chromatography (3:1 (v/v) petroleum ether/EtOAc) to afford the title compound as colorless oil (2.7 g, 88%).

Workup

  1. customthe reaction mixture was quenched with 5 mL of water
  2. extractionThe mixture was extracted with EtOAc (50 mL×2)
  3. dry with materialThe combined organic phases were dried over Na2SO4
  4. concentrationconcentrated in vacuo
  5. customto give pale yellow oil
  6. customThe crude product was purified by a silica gel column chromatography (3:1 (v/v) petroleum ether/EtOAc)

Sources & evidence

ORD record
ord-d0ec3e3bdf574fefa094159992623da9
Source dataset
uspto-grants-2013_04
Patent number
US08426585B2

Reaction notes

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