Me r

N^SO2Mes

^SO2Mes

CO2fBu toluene-H2O 0 °C

HN R^CN

'CO2f Bu

'CO2f Bu

X = H, 5-F,5-Me, 5-OMe, 6-Cl, 6-C F3 Y = H, 4-F,4-Me, 4-OMe, 4-Cl, 4-Ph

Scheme 2.27 Examples of reactions with chiral onium salts

Strecker reaction [163], fluorination of b-ketoesters [164], and a variety of conjugate additions [165-168] (Scheme 2.27b-d).

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