Ethyl Acetate → (1S,3S,4S)-3-[(benzyloxy)methyl]-4-{[tert-butyl(dimethyl)silyl]oxy}cyclopentanol

HRID 1677983Notes

Reaction equation

HRID 1677983 reaction equation
[CH2:1]([O:8][CH2:9][C:10]1[C@@H:14]([O:15][Si:16]([C:19]([CH3:22])([CH3:21])[CH3:20])([CH3:18])[CH3:17])[CH2:13][C@@H:12]([OH:23])[CH:11]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C(=O)([O-])[O-].[Na+].[Na+].CCOC(C)=O>[Pd]>[CH2:1]([O:8][CH2:9][C@H:10]1[C@@H:14]([O:15][Si:16]([C:19]([CH3:21])([CH3:20])[CH3:22])([CH3:18])[CH3:17])[CH2:13][C@@H:12]([OH:23])[CH2:11]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

5

Reactant 3

HCID 8857Ethyl AcetateHCID 10340Sodium CarbonateHCID 66797876(1R,4S)-3-[(benzyloxy)methyl]-4-{[tert-butyl(dimethyl)silyl]-oxy}cyclopent-2-en-1-ol

Product 1

HCID 66798092(1S,3S,4S)-3-[(benzyloxy)methyl]-4-{[tert-butyl(dimethyl)silyl]oxy}cyclopentanolYield 98.1%

Reagents, catalysts & solvents 1

HCID 23938PalladiumCatalyst

Procedure

A suspension of (1R,4S)-3-[(benzyloxy)methyl]-4-{[tert-butyl(dimethyl)silyl]-oxy}cyclopent-2-en-1-ol (1.47 g, 0.00439 mol), sodium carbonate (1.1 g, 0.010 mol) and 10% Pd/C (0.3 g, 0.0003 mol) in EtOAc (20 mL, 0.2 mol) was stirred under an atmosphere of Hydrogen overnight. The reaction was purged with nitrogen and filtered through celite with EtOAc. The filtrate was concentrated to obtain 1.45 g (98%) of the title compound as a 5:1 mixture of diastereomers (desired:undesired).

Workup

  1. customThe reaction was purged with nitrogen
  2. filtrationfiltered through celite with EtOAc
  3. concentrationThe filtrate was concentrated

Sources & evidence

ORD record
ord-a4c8d3f7aaad4c44b76c4f5d4d1163c4
Source dataset
uspto-grants-2011_08
Patent number
US08008307B2

Reaction notes

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