Benzaldehyde → (1S)-1-Phenylbut-3-en-1-ol

Participants

Reaction Conditions

Reaction Steps

A solution of 1.25 mmol of the titanium compound of Example 2b in 60 ml of diethyl ether is cooled to -74° C., and 0.1 ml (1.0 mmol) of freshly distilled benzaldehyde is added. The slightly yellow, clear solution is stirred for a further 2 hours at -74° C. and 5 ml of a 5N H2O/THF solution are added and the mixture is warmed to RT, stirred for a further hour at this temperature, filtered with suction and concentrated on a rotary evaporator. The crude product (0.80 g of a clear colourless oil) is flash-chromatographed (60 g of silica gel, 35 cm long, cross-section 2 cm, 5 ml/fraction, 0.4 bar, 10:1 toluene/ethanol). 0.098 g of product is obtained. Yield: 66%, ee: 93%.

Provenance & Evidence