Abstract
Four new BINOL-based thiazole (thiadiazole) thioether ligands ( S)- 1, ( S)- 2, ( S,S)- 3 and ( S)- 4 were prepared. When their catalytic effectiveness was tested, good results (up to 93% ee and 97% yield) were obtained in the asymmetric addition of diethylzinc to aldehydes while poor results were obtained in the asymmetric conjugate addition of diethylzinc to enones.
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