(S)-Valine amides containing (S)- or (R)-α-phenylethyl substituents at N1 atom efficiently catalyze asymmetric aldol reactions between cyclic (heterocyclic) ketones and aromatic aldehydes in water, predominantly giving rise to the aldol anti-diastereomers in high yields (up to 98%) and enantiomeric excess (up to 94%).
含有在N1原子上带有(S)-或(R)-α-苯乙基取代基的(S)-缬
氨酰胺,能高效催化
水中环状(杂环)酮与芳香醛的不对称Aldol反应,主要生成高产率(高达98%)和高对映体过量(高达94%)的Aldol反式异构体。