作者:Yin Zheng、Suihan Zhang、Kam-Hung Low、Weiwei Zi、Zhongxing Huang
DOI:10.1021/jacs.1c12404
日期:2022.2.2
can reductively desymmetrize a large collection of easily available halomalonic esters to α-halo-β-hydroxyesters. These polyfunctionalized tertiary alkyl fluorides, chlorides, and bromides proved to be useful intermediates toward fluorinated drug analogs and polyhalogenated monoterpenes. The facile intramolecular epoxidation of the chiral chloride and bromide products has also enabled expeditious access
对映体富集的叔烷基卤化物普遍存在于生物活性分子中,可作为通用合成中间体来构建复杂结构。虽然常规获得这些基序通常取决于立体选择性碳-卤素或碳-碳键形成反应,但相比之下,使用卤代和前手性四取代碳的不对称方法在很大程度上难以捉摸。在这里,我们报告了一套具有脯氨醇或哌啶醇衍生的四齿配体的双核锌催化剂可以将大量容易获得的卤代丙二酸酯还原为α-卤代-β-羟基酯。这些多官能化的叔烷基氟化物、氯化物和溴化物被证明是氟化药物类似物和多卤化单萜的有用中间体。