Dimethylformamide → Isohexane ethyl acetate

Participants

Reaction Conditions

Reaction Steps

(3-tert-Butoxy-5-fluoro-phenyl)-thiocarbamic acid O-isopropyl ester (2.2 g) is dissolved in dry tetrahydrofuran (20 ml) The reaction mixture is cooled to −78° C. and tert-butyl lithium (15.2 ml, of 1.5 M solution) is added over 20 minutes. The reaction mixture is then warmed to −10° C. for 75 minutes. The reaction mixture is then re-cooled to −78° C., N,N-dimethyl-formamide (1.5 g) is added and the reaction mixture is slowly warmed to room temperature then stirred at −10° C. for 1 hour. The reaction mixture is quenched with HCl(aq) (5 ml, of a 2 M solution), the organics are separated between ethyl acetate/water and removed in vacuo. The title compound is obtained by flash column chromatography (silica, eluent ethyl acetate/iso-hexane 1:9).

Provenance & Evidence