Solvent switchable cycloaddition: a (one-pot) metal-free approach towards N-substituted benzo[e]- or [f]isoindolones via C<sub>sp2</sub>–H functionalization
作者:Pratik A. Ambasana、Dipak D. Vachhani、Marzia Galli、Jeroen Jacobs、Luc Van Meervelt、Anamik K. Shah、Erik V. Van der Eycken
DOI:10.1039/c4ob01644k
日期:——
The tuning of selective ring closure is a nontrivial challenge in synthetic organic chemistry. Herein we report a solvent switchable metal-free [4 + 2] cycloaddition approach via Csp2âH functionalization. The protocol is highly atom economical with water being the only by-product, delivering N-substituted benzo[e]- or [f]isoindolones in high yields.
选择性环合反应的调控是合成有机化学中的一个重要挑战。在此,我们报道了一种通过Csp2−H官能化实现的可溶剂切换、无金属参与的[4 + 2]环加成方法。该方法具有高度原子经济性,唯一的副产品是水,能够高效合成N-取代的苯并[e]-或[f]异吲哚酮。