作者:Rui Zhang、Tingting Yu、Guangbin Dong
DOI:10.1126/science.adk1001
日期:2023.11.24
introduced alkyl chain; thus, the choice of alkylation reagent sets the homologation length. The key step involves a carbon-carbon bond activation process by a carbene-coordinated rhodium complex with assistance from a removable directing group. The approach is demonstrated for introduction of chains as long as 16 carbons and is applicable to derivatized carboxylic acids in complex bioactive molecules.
从铅化合物制备多种同源物一直是药物化学中常见且重要的做法。然而,羧酸衍生物(尤其是酰胺)的同源性仍然具有挑战性。在这里,我们报告了一种钩滑策略,用于插入碳链长度可调的叔酰胺同源化物。酰胺α位(钩子)的烷基化反应之后是高选择性支链到线性异构化(滑动),以使酰胺迁移到新引入的烷基链的末端;因此,烷基化试剂的选择决定了同系长度。关键步骤涉及在可拆卸导向基团的协助下,通过卡宾配位铑络合物进行碳-碳键活化过程。该方法被证明用于引入长达 16 个碳的链,并且适用于复杂生物活性分子中的衍生化羧酸。