作者:Bibia Bennacer、Christian Rivalle、David S. Grierson
DOI:10.1002/ejoc.200300401
日期:2003.12
A new synthesis of dihydroeponemycin (2), a peptide epoxide with potent cytotoxic and antiangiogenesis activity, has been developed. In the initial steps, Fmoc-Leu-Cl was converted into the key amino ketone intermediate 9 by Stille coupling with tributylvinyltin, conjugate addition of PhSAlMe2 to the derived enone, S-oxidation, and heat-induced syn elimination. Subsequent reaction of 9 with H2O2 and
已开发出一种新合成的二氢棘皮霉素 (2),一种具有强效细胞毒性和抗血管生成活性的肽环氧化物。在最初的步骤中,Fmoc-Leu-Cl 通过 Stille 与三丁基乙烯基锡偶联、PhSAlMe2 与衍生烯酮的共轭加成、S-氧化和热诱导的顺式消除转化为关键的氨基酮中间体 9。随后 9 与 H2O2 和催化 Triton B 的反应以 89% 的产率产生了相应的环氧化物,为 1:1 的非对映体混合物。在四步“一锅法”方案中,这些环氧化物被分离并单独转化为 2 和 (2S)-表-二氢埃霉素 (24)(两种情况下的总产率均为 77%)。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)