3,4-dihydro-2H-pyran → 1-(4-Benzyloxyphenyl)-1-(2-tetrahydropyranyloxy)-2-[2-(p-toluenesulfonyloxy)ethoxy]ethane

HRID 862509Notes

Reaction equation

HRID 862509 reaction equation
[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][C:12]([CH:15]([OH:31])[CH2:16][O:17][CH2:18][CH2:19][O:20][S:21]([C:24]2[CH:29]=[CH:28][C:27]([CH3:30])=[CH:26][CH:25]=2)(=[O:23])=[O:22])=[CH:11][CH:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[O:32]1[CH:37]=[CH:36][CH2:35][CH2:34][CH2:33]1.C1(C)C=CC(S([O-])(=O)=O)=CC=1.[NH+]1C=CC=CC=1>C(Cl)Cl>[CH2:1]([O:8][C:9]1[CH:10]=[CH:11][C:12]([CH:15]([O:31][CH:33]2[CH2:34][CH2:35][CH2:36][CH2:37][O:32]2)[CH2:16][O:17][CH2:18][CH2:19][O:20][S:21]([C:24]2[CH:25]=[CH:26][C:27]([CH3:30])=[CH:28][CH:29]=2)(=[O:23])=[O:22])=[CH:13][CH:14]=1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

5

Reactant 3

HCID 80803,4-dihydro-2H-pyranHCID 466102Benzenesulfonic acid, 4-methyl-, compd. with pyridine (1:1)HCID 541244381-(4-Benzyloxyphenyl)-2-[2-(p-toluenesulfonyl)oxyethoxy]ethanol

Product 1

HCID 540014191-(4-Benzyloxyphenyl)-1-(2-tetrahydropyranyloxy)-2-[2-(p-toluenesulfonyloxy)ethoxy]ethane

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

To a mixture of 20 g of 1-(4-benzyloxyphenyl)-2-[2-(p-toluenesulfonyloxy)ethoxy]ethanol and 40 ml of methylene chloride containing 8.2 g of 3,4-dihydro-2H-pyrane was added 2.3 g of pyridinium p-toluenesulfonate at room temperature. The resulting mixture was refluxed for 30 minutes. The reaction mixture was cooled and added to a mixture of 100 ml of ice water and 100 ml of methylene chloride. The organic layer was separated, washed with water, and dried over anhydrous magnesium sulfate. The solvent was removed by distillation under reduced pressure to obtain 18.6 g of light yellow oily 1-(4-benzyloxyphenyl)-1-(2-tetrahydropyranyloxy)-2-[2-(p-toluenesulfonyloxy)ethoxy]ethane.

Workup

  1. temperatureThe resulting mixture was refluxed for 30 minutes
  2. temperatureThe reaction mixture was cooled
  3. customThe organic layer was separated
  4. washwashed with water
  5. dry with materialdried over anhydrous magnesium sulfate
  6. customThe solvent was removed by distillation under reduced pressure

Sources & evidence

ORD record
ord-f39432c72a194be6b370b990ecd7dfc7
Source dataset
uspto-grants-1998_02
Patent number
US05719150

Reaction notes

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