作者:Annie Pouilhès、Anel Florès Amado、Anne Vidal、Yves Langlois、Cyrille Kouklovsky
DOI:10.1039/b800840j
日期:——
Pyrinodemin A 1, a cytotoxic marine alkaloid, was synthesized in a convergent and enantioselective fashion. The key steps are an asymmetric intramolecular dipolar cycloaddition of an oxazoline N-oxide to introduce the bicyclic ring system of the molecule, a cuprate coupling for the extension of the saturated chain and a B-alkyl Suzuki coupling for the introduction of a 3-pyridyl moiety. Reductive amination allowed the coupling of the second side-chain onto the nitrogen atom to give 1. Additionally, attempts to prepare 1 from a trienic precursor by a double B-alkyl Suzuki reaction are described.
Pyrinodemin A 1是一种具有细胞毒性的海洋生物碱,以一种汇聚和选择性鉴别的方式合成。关键步骤包括:将氧杂环N-氧化物进行不对称的分子内偶极环化反应,以引入分子的双环体系;通过铜盐偶联扩展饱和链;以及B-烷基铃木偶联以引入3-吡啶基部分。还原胺化反应使得第二个侧链与氮原子相连接,从而得到1。此外,还描述了通过双B-烷基铃木反应从三烯前体制备1的尝试。