2-Methylbenzenesulfonic acid → 1-Tert-butyldimethylsilyloxy-2-tetrahydropyranyloxy-2-(4-tertbutylphenyl) ethane

HRID 1751889Notes

Reaction equation

HRID 1751889 reaction equation
[Si:1]([O:8][CH2:9][CH:10]([OH:21])[C:11]1[CH:16]=[CH:15][C:14]([C:17]([CH3:20])([CH3:19])[CH3:18])=[CH:13][CH:12]=1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].[O:22]1[CH:27]=[CH:26][CH2:25][CH2:24][CH2:23]1.C1(C)C(S(O)(=O)=O)=CC=CC=1>ClCCl>[Si:1]([O:8][CH2:9][CH:10]([O:21][CH:23]1[CH2:24][CH2:25][CH2:26][CH2:27][O:22]1)[C:11]1[CH:16]=[CH:15][C:14]([C:17]([CH3:20])([CH3:19])[CH3:18])=[CH:13][CH:12]=1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2]

Participants

5

Reactant 3

HCID 69252-Methylbenzenesulfonic acidHCID 80803,4-dihydro-2H-pyranHCID 596786511-Tert-butyldimethylsilyloxy-2-hydroxy-2-(4-tert-butylphenyl)ethane

Product 1

HCID 596786401-Tert-butyldimethylsilyloxy-2-tetrahydropyranyloxy-2-(4-tertbutylphenyl) ethane

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

1-Tert-butyldimethylsilyloxy-2-hydroxy-2-(4-tert-butylphenyl)ethane (0.5 g, 1.622 mmol) is dissolved in dichloromethane and to it is added dihydropyran (0.163 g, 1.94 mmol) and toluenesulfonic acid (33 mg, 0.194 mmol). The reaction is stirred for 2 hours after which the mixture is washed with water and dried. The crude residue obtained after concentration is purified by flash chromatography (silica gel; ethyl acetate/hexanes) to obtain the product.

Workup

  1. washis washed with water
  2. customdried

Sources & evidence

ORD record
ord-e4d0e1440b314cb5a70dcebf9a8f2629
Source dataset
uspto-grants-2015_10
Patent number
US09161997B2

Reaction notes

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