Cascade annulations of aryldiazonium salts, nitriles and halo-alkynes leading to 3-haloquinolines
作者:Mani Ramanathan、Shiuh-Tzung Liu
DOI:10.1016/j.tet.2017.05.085
日期:2017.7
A regiospecific access to 3-haloquinolines has been developed via a three-component annulation of aryldiazonium salts, nitriles and haloalkynes. This reaction proceeds through an initial formation of reactive nitrilium ion and further cascade annulation with haloalkynes. This method provides a straightforward access to a diverse array of functionalized quinolones (28 examples) under mild conditions
通过芳基重氮盐,腈和卤代炔烃的三组分环化,已经开发出了对3-卤代喹啉的区域专一性途径。该反应通过反应性腈离子的初步形成并进一步与卤代炔烃级联进行。该方法可在温和条件下直接访问各种功能化的喹诺酮类药物(28个实例),并具有广泛的官能团耐受性。说明了该方法在克规模反应和匹伐他汀正式合成中的应用。