The development of one-pot imine formation and asymmetric Pictet−Spenglerreactions cocatalyzed by a chiral thiourea and benzoic acid is described. Opticallyactivetetrahydro-β-carbolines, ubiquitous structural motifs in biologically active natural products, are obtained in high ee directly from tryptamine and aldehyde precursors.
描述了手性硫脲和苯甲酸共催化的一锅亚胺形成和不对称 Pictet-Spengler 反应的发展。光学活性四氢-β-咔啉是生物活性天然产物中普遍存在的结构基序,直接从色胺和醛前体以高 ee 获得。
Novel, Chiral, and Enantiopure C
<sub>2</sub>
‐Symmetric Thioureas Promote Asymmetric Protio‐Pictet‐Spengler Reactions by Anion‐Binding Catalysis
the enantioselective reaction of tryptamines with aldehydes (protio‐Pictet‐Spengler reactions) to give the corresponding tetrahydro‐β‐carbolines with good enantioselectivity (up to 95 % ee) by chiral anion‐binding catalysis.