手性磷酸/可见光催化手性2-取代四氢喹啉的合成
首发时间:2019-05-22
摘要:开发了一种将手性磷酸催化与可见光诱导相结合的有效方法,实现了手性四氢喹啉化合物高对映选择性合成。通过可见光诱导的环化/手性磷酸催化的转移氢化串联反应将2-氨基查尔酮直接转化为手性2-取代的四氢喹啉。考察了多种不同取代的2-氨基查尔酮的反应,均能以高产率(up to 98%)和优异对映选择性(up to >99% ee)获得相应的产物。
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Synthesis of Chiral 2-Substituted Tetrahydroquinoline Catalyzed by Chiral Phosphoric Acid and Visible light
Abstract:In this paper,an efficient method merging chiral phosphoric acid catalysis with visible-light induction for the highly enantioselective synthesis of tetrahydroquinolines has been developed. This mild process directly transformed 2-aminoenones into 2-substituted tetrahydroquinolines with excellent enantioselectivities through a relay visible-light induced cyclization/chiral phosphoric acid catalyzed transfer hydrogenation reaction. A variety of substituted 2-aminoenones were attempted to obtain high yield (up to 98%) and excellent enantioselectivity (up to >99% ee).
Keywords: Organic catalysis Chiral phosphoric acid Photocatalytic Tetrahydroquinoline
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