Enantioselective synthesis of phomallenic acid C, an inhibitor of bacterial FAS II pathway, was successful. Allenyldiyne structure was constructed by a direct anti-SN2′ coupling of propargyl mesylate with diynylindium in the presence of palladium catalyst. Enantiomeric purity was determined by Ohrui–Akasaka method to be 83%ee.
细菌FAS II途径抑制剂磷丙二酸C的对映选择性合成成功。烯丙基二炔结构是通过在钯催化剂存在下,将炔丙基甲磺酸酯与二炔基吡啶直接抗-S N 2'偶联而构建的。通过Ohrui–Akasaka方法测定对映体纯度为83%ee。
Enantioselective synthesis of phomallenic acid C by In- and Pd-mediated anti-SN2′ coupling
Enantioselective synthesis of phomallenic acid C, an inhibitor of bacterial FAS II pathway, was succeeded. Allenyldiyne structure was constructed by a direct anti-SN2′ coupling of propargyl mesylate with diynylindium in the presence of palladium catalyst. Enantiomeric purity was determined by Ohrui–Akasaka method to be 96% ee.
细菌FAS II途径抑制剂磷丙二酸C的对映选择性合成成功。烯丙基二炔结构是通过在钯催化剂存在下,将炔丙基甲磺酸酯与二炔基吡啶直接抗-S N 2'偶联而构建的。通过Ohrui–Akasaka方法测定对映体纯度为96%ee。
Total Syntheses of Phomallenic Acids B and C Utilizing Palladium-Catalyzed Coupling of Propargylic Tosylates with Terminal Alkynes
Total syntheses of (±)-phomallenic acids B and C, potent FAS II inhibitors, have been achieved by a palladium-catalyzed coupling of propargylic tosylates and terminal alkynes. Attempts to find an enantiospecific coupling using opticallyactive propargylic compounds resulted in racemization of the products.
(±)-磷烯酸 B 和 C(有效的 FAS II 抑制剂)的全合成已经通过钯催化的炔丙基甲苯磺酸盐和末端炔烃的偶联来实现。使用旋光炔丙基化合物寻找对映体特异性偶联的尝试导致产物的外消旋化。