DDQ-Promoted Mild and Efficient Metal-Free Oxidative α-Cyanation of N-Acyl/Sulfonyl 1,2,3,4-Tetrahydroisoquinolines
作者:Hong Kim、Heesun Yu、Hyoungsu Kim、Seok-Ho Kim、Dongjoo Lee
DOI:10.3390/molecules23123223
日期:——
N-acyl/sulfonyl iminium ions with (n-Bu)3SnCN. Employing readily removable N-acyl/sulfonyl groups as protecting groups rather than N-aryl ones enables a wide range of applications in natural product synthesis. The synthetic utility of the method was illustrated using a short and efficient formal total synthesis of (±)-calycotomine in three steps.
N-酰基/磺酰基 1,2,3,4-四氢异喹啉 (THIQ) 的温和且高效的无金属氧化 α-氰化反应已在环境温度下通过 DDQ 氧化和随后的 N-酰基/磺酰基亚胺的捕获完成(n-Bu)3SnCN 离子。使用易于去除的 N-酰基/磺酰基作为保护基团而不是 N-芳基使天然产物合成中的应用范围广泛。使用 (±)-calycotomine 的短而有效的形式全合成分三个步骤说明了该方法的合成效用。