Hydrochloric Acid → (+)-trans-1-t-Butyldimethylsilyloxymethyl-4-oxo-2-phenylcyclopentane

HRID 1634272Notes

Reaction equation

HRID 1634272 reaction equation
[OH:1][CH2:2][C@H:3]1[C@H:7]([C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)[CH2:6][C:5](=[O:14])[CH2:4]1.[Si:15](Cl)([C:18]([CH3:21])([CH3:20])[CH3:19])([CH3:17])[CH3:16].CCN(C(C)C)C(C)C.Cl>C(Cl)Cl>[Si:15]([O:1][CH2:2][C@@H:3]1[CH2:4][C:5](=[O:14])[CH2:6][C@H:7]1[C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)([C:18]([CH3:21])([CH3:20])[CH3:19])([CH3:17])[CH3:16]

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 28928tert-Butyldimethylsilyl chlorideHCID 81531DiisopropylethylamineHCID 53754795(+)-trans-3-Hydroxymethyl-4-phenylcyclopentan-1-one

Product 1

HCID 18686192(+)-trans-1-t-Butyldimethylsilyloxymethyl-4-oxo-2-phenylcyclopentaneYield 129.3%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of (+)-trans-3-hydroxymethyl-4-phenylcyclopentan-1-one from Example 8, Step F (3.3 g, 16 mmol) in methylene chloride (100 mL) was added t-butyldimethylsilyl chloride (11 g, 49 mmol) and DIPEA (22 mL, 74 mmol). The reaction was stirred at rt for 16 h, poured into dilute aq. hydrochloric acid and extracted twice with ether. The organic layers were washed with brine, dried over sodium sulfate, a combined and concentrated. The residue was purified by FC (5% ethyl acetate in hexanes) to afford of (+)-trans-1-t-butyldimethylsilyloxymethyl-4-oxo-2-phenylcyclopentane (6.3 g) as a oil.

Workup

  1. extractionextracted twice with ether
  2. washThe organic layers were washed with brine
  3. dry with materialdried over sodium sulfate
  4. concentrationconcentrated
  5. customThe residue was purified by FC (5% ethyl acetate in hexanes)

Sources & evidence

ORD record
ord-a93947a9ce4f4082884d3f199442879e
Source dataset
uspto-grants-2003_01
Patent number
US06506777B1

Reaction notes

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