反应详情

1-Bromo-2-(2,2-dimethoxypropyl)benzene (4.00 g, 15.43 mmol) was dissolved in 150 mL THF and tert-butyllithium (18.160 mL, 30.871 mmol) was added dropwise at −78° C. After addition a solution of (R)—N-(4-(trifluoromethyl)-benzylidene)-2-methylpropane-2-sulfinamide (8.5608 g, 30.871 mmol) in THF (10 mL) was added and stirring was continued for 10 min in the cold. The reaction was hydrolyzed with 50 mL water and the mixture was warmed to RT. TLC showed a 1:1 mixture of the 2 diastereomers. No attempt was undertaken to separate the isomers. Glass column chromatography provided the title compound as a mixture of diastereomers. MS (ESI, positive ion) m/z: 412.0 (M+1; hydrolysis of the dimethyl acetal to the corresponding ketone).

1. additionwas added
2. additiona 1:1 mixture of the 2 diastereomers
3. customto separate the isomers