A process based on the organocatalyzed Mannich/cycloketalization/transesterification tandem reaction of 1-(2-hydroxyaryl)-1,3-diketones and β,γ-alkynyl α-imino esters has been developed, delivering a variety of tricyclic furanobenzodihydropyrans with excellent results (up to 99% yield, 99% ee, and >19:1 dr).
开发了一种基于 1-(2-羟基芳基)-1,3-二酮和 β,γ-炔基 α-亚
氨基酯的有机催化曼尼希/环
缩酮化/酯交换串联反应的工艺,以优异的结果提供多种
三环呋喃并苯并二氢
吡喃(高达 99% 的产率、99% 的 ee 和 >19:1 dr)。