domino double cyclization of N-benzyltryptyl-4-pentenamide has been developed for rapid assembly of a novel azepane-fused tetrahydro-β-carboline framework. With a serendipitous stereocontrolled alkylation, the total synthesis of (±)-20-epi-Kopsiyunnanine K have been successfully accomplished.
N -benzyltryptyl-4-pentenamide 的多米诺双环化已被开发用于快速组装新型氮杂
环庚烷稠合的四氢-β-咔啉骨架。通过偶然的立体控制烷基化,成功完成了(±)-20- epi -Kopsiyunnanine K的全合成。