Stereoselective Synthesis of Aporphine Alkaloids Using a Hypervalent Iodine(III) Reagent-Promoted Oxidative Nonphenolic Biaryl Coupling Reaction. Total Synthesis of (<i>S</i>)-(+)-Glaucine
作者:Dolores Badía、Eneritz Anakabe、Luisa Carrillo、Jose L. Vicario、Maite Villegas
DOI:10.1055/s-2004-816009
日期:——
hydrogenation led to the key intermediate, optically active, 1-benzyltetrahydroisoquinolines 7a-c. The final C-ring closure step was performed by C-C biaryl bond formation by an hypervalent iodine(III) reagent promoted oxidative coupling, affording the target heterocycles 8a-c in good yields and with no racemization at the formerly created stereogenic center.
由适当的 1,2-二芳基乙胺衍生物(依次使用 (S)-(+) -苯基甘氨醇作为手性载体。接下来,一系列简单的转化:用溴乙醛二乙缩醛进行 N-烷基化、N-甲基化、Pommeranz-Fritsch 环化和离子加氢,得到关键的中间体、光学活性的 1-苄基四氢异喹啉 7a-c。最后的 C 环闭合步骤是通过高价碘 (III) 试剂形成的 CC 联芳键进行的,促进氧化偶联,以良好的收率提供目标杂环 8a-c,并且在以前创建的立体中心没有外消旋化。