Total Synthesis and Biological Evaluation of Irciniastatin A (a.k.a. Psymberin) and Irciniastatin B
作者:Shun-ichiro Uesugi、Tsubasa Watanabe、Takamichi Imaizumi、Yu Ota、Keisuke Yoshida、Haruna Ebisu、Takumi Chinen、Yoko Nagumo、Masatoshi Shibuya、Naoki Kanoh、Takeo Usui、Yoshiharu Iwabuchi
DOI:10.1021/acs.joc.5b02256
日期:2015.12.18
B are members of the pederin natural product family, which have potent antitumor activity and structural complexity. Herein, we describe a full account of our total synthesis of (+)-irciniastatin A and (−)-irciniastatin B. Our synthesis features the highly regioselective Eu(OTf)3-catalyzed, DTBMP-assisted epoxide ring opening reaction with MeOH, which enabled a concise synthesis of the C1–C6 fragment
Irciniastatin A(又称Psymberin)和irciniastatin B是pederin天然产品家族的成员,它们具有强大的抗肿瘤活性和结构复杂性。本文中,我们全面描述了(+)-irciniastatin A和(-)-irciniastatin B的总合成。我们的合成具有高区域选择性Eu(OTf)3催化的DTBMP辅助的MeOH环氧化物开环反应,可以简明合成C1-C6片段,并广泛使用AZADO(2-azaadamantane N-氧基)及其相关的硝氧基自由基/氧铵盐催化的醇氧化,贯穿整个合成过程,以及C1-C6,C8-C16和C17-C25片段的后期组装。此外,对于(-)-irciniastatin B的合成,我们通过区域选择性脱保护和AZADO催化的醇氧化实现了对氧化阶段的C11选择性控制。合成的irciniastatins对哺乳动物细胞显示出高水平的细胞毒活性。此外,使用