已经证明了 FR252921(一种有效的大环免疫抑制剂)的正式合成和维生素 A 的六步合成。钌催化的经济和环境友好策略在高立体选择性和化学选择性构建 FR252921 和维生素 A 的有价值的多烯基序中的应用突出了合成。合成 FR252921 的关键特征包括制备三烯部分,然后是三个片段的两个连续肽偶联。
Jackpot: Two for one! Concise and highly convergent syntheses of the immunosuppressive agent FR252921 and the related antimicrobial natural product pseudotrienic acid B were achieved from one common intermediate by using optically active titanium complexes to control the configuration of the stereogenic centers, a highly stereo‐ and regioselective cross‐metathesis to generate the triene moieties, and
A concise and highly convergent synthesis of the promisingimmunosuppressantFR252921 was achieved by using optically active titanium complexes to control the configuration of the three stereogenic centers.