Reaction equation
[C:1]([O:5][CH3:6])(=[O:4])[CH:2]=[CH2:3].[F:7][C:8]([F:19])([F:18])[C:9]([C:14]([F:17])([F:16])[F:15])([OH:13])[CH2:10]C=C>ClCCl>[F:7][C:8]([F:18])([F:19])[C:9]([OH:13])([C:14]([F:16])([F:15])[F:17])[CH2:10]/[CH:3]=[CH:2]/[C:1]([O:5][CH3:6])=[O:4]Participants
Procedure
To a 250 mL 3 neck roundbottom flask with reflux condenser and Teflon-coated magnetic stir bar was added methyl acrylate (9.10 g, 105.7 mmol, 1.1 eq.), 1,1,1-trifluoro-2-trifluoromethyl-pent-4-ene-2-ol (20 g, 96.1 mmol, 1 eq.) and 100 mL of anhydrous dichloromethane. The solution was heated to reflux under nitrogen and 300 mg of the Hoveyda-Grubbs 2nd generation ruthenium metathesis catalyst (0.048 mmol, 0.005 eq.) was added in 4 portions over 4 hours. The reaction was heated an additional 12 hours after which the product was purified by vacuum distillation (65° C., 6 Torr) and column chromatography (silica gel, 80:20 hexane:ethyl acetate eluent) to afford 16.7 g of methyl 6,6,6-trifluoro-5-hydroxy-5-(trifluoromethyl)hex-2-enoate (I) as colorless liquid (E/Z=2.15:1) contaminated with a small amount (0.15 eq.) of 1,1,1,8,8,8-hexafluoro-2,7-di(trifluoromethyl)-oct-4-ene-2,7-diol (E/Z=6.7:1).
Workup
- temperatureThe solution was heated
- temperatureto reflux under nitrogen
- temperatureThe reaction was heated an additional 12 hours after which the product
- distillationwas purified by vacuum distillation (65° C., 6 Torr) and column chromatography (silica gel, 80:20 hexane:ethyl acetate eluent)
Sources & evidence
- ORD record
- ord-5efad1af53a348f381f95a382368136e
- Source dataset
- uspto-grants-2012_02
- Patent number
- US08124327B2
Linked notes
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