Bis(indole) alkaloids analogues were prepared under mild conditions and in high yields through a gold‐catalyzed cycloisomerization of 1,1‐bis(indolyl)‐5‐alkynes (see scheme). The enantioselective version of this reaction gave the corresponding products in moderate to excellent yields (55–90 %), moderate to good ee values (48–96 %), and satisfactory regioselectivities (3.5:1→20:1).
双(
吲哚)
生物碱类似物是在温和的条件下通过
金催化的1,1-双(
吲哚基)-5-
炔烃的环异构化反应制得的(见方案)。该反应的对映选择性使相应的产物具有中等至极好的收率(55–90%),中等至良好的ee 值(48–96%)和令人满意的区域选择性(3.5:1→20:1)。