The enantioselective synthesis of α-substituted β,γ-unsaturated aldehydes and ketones 6 via aldol reaction of SAMP-hydrazones (S)-2 with racemic α-phenylselenyl aldehydes 3 in good overall yields and high enantiomeric excesses (ee = 89-94%) is described.
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SAMP-hydrazones (S)-2 与外消旋δ-苯基
硒醛 3 的醛醇反应,以良好的总收率和较高的对映体过量(ee = 89-94%),对映选择性地合成δ-取代的δ²,δ³-不饱和醛和酮 6。