Weak Brønsted Acid−Thiourea Co-catalysis: Enantioselective, Catalytic Protio-Pictet−Spengler Reactions
作者:Rebekka S. Klausen、Eric N. Jacobsen
DOI:10.1021/ol802887h
日期:2009.2.19
The development of one-pot imine formation and asymmetric Pictet−Spengler reactions cocatalyzed by a chiral thiourea and benzoic acid is described. Optically active tetrahydro-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。