2-Hydroxy-4-(5-fluoro-2-methoxyphenyl)-4-methyl-2-trifluoromethyl-pentanol → 1,1,1-Trifluoro-4-(5-fluoro-2-methoxyphenyl)-4-methylpentan-2-one

HRID 1070964Notes

Reaction equation

HRID 1070964 reaction equation
[F:1][C:2]1[CH:3]=[CH:4][C:5]([O:20][CH3:21])=[C:6]([C:8]([CH3:19])([CH3:18])[CH2:9][C:10]([C:14]([F:17])([F:16])[F:15])([OH:13])CO)[CH:7]=1.I([O-])(=O)(=O)=O.[Na+]>CO.CCOCC>[F:17][C:14]([F:15])([F:16])[C:10](=[O:13])[CH2:9][C:8]([C:6]1[CH:7]=[C:2]([F:1])[CH:3]=[CH:4][C:5]=1[O:20][CH3:21])([CH3:19])[CH3:18]

Participants

5

Reactant 2

HCID 219489282-Hydroxy-4-(5-fluoro-2-methoxyphenyl)-4-methyl-2-trifluoromethyl-pentanolHCID 23667635Sodium periodate

Product 1

HCID 100849201,1,1-Trifluoro-4-(5-fluoro-2-methoxyphenyl)-4-methylpentan-2-oneYield 87.6%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 3283Diethyl EtherSolvent

Procedure

To a solution of 4.9 g (15.8 mmol) of the above 4-(5-fluoro-2-methoxyphenyl)-4-methyl-2-trifluoromethylpentane-1,2-diol in 100 mL of MeOH was added 10 g (45.9 mmol) of sodium periodate. The mixture was stirred for 4 hours and was then diluted with 100 mL of ether and 100 mL of hexanes, filtered through diatomaceous earth, and concentrated in vacuo. The crude residue was dissolved in hexanes and passed through a pad of silica gel eluting first with hexanes then with EtOAc-hexanes (2:98, then 4:96) to afford 3.85 g (87%) of 1,1,1-trifluoro-4-(5-fluoro-2-methoxyphenyl)-4-methylpentan-2-one as a clear oil.

Workup

  1. filtrationfiltered through diatomaceous earth
  2. concentrationconcentrated in vacuo
  3. dissolutionThe crude residue was dissolved in hexanes

Sources & evidence

ORD record
ord-1759a060af284f0d902a55291b0c16a8
Source dataset
uspto-grants-2005_06
Patent number
US06903215B2

Reaction notes

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