A mild, environmentally friendly, and regioselective acylation of heterocycles with inexpensive carboxylic acids is reported via photoredox catalysis. The strategy is highlighted with good functional group tolerance and substrate scope which could rapidly realize the acylation of various heterocyclic compounds.
Photoredox‐Catalyzed Redox‐Neutral Minisci C−H Formylation of
<i>N</i>
‐Heteroarenes
作者:Jianyang Dong、Xiaochen Wang、Hongjian Song、Yuxiu Liu、Qingmin Wang
DOI:10.1002/adsc.201901481
日期:2020.5.26
report a protocol for redox‐neutral Minisci C−H formylation of N ‐heteroarenes using 1,3‐dioxoisoindolin‐2‐yl 2,2‐diethoxyacetate as a formyl equivalent at room temperature. This scalable benchtop protocol offers a distinct advantage over traditional reductive carbonylation and Minisci C−H formylation methods in not requiring the use of carbonmonoxide, pressurized gas, a stoichiometric reductant, or
Herein, a mild and effective hydroxymethylation and formylation of quinolines or isoquinolines with methanol in the absence of external acids and transition metals is described using the coupling reaction promoted by PhIFA and visible light. A variety of substituted quinolines or isoquinolines proceed the reaction smoothly, providing the corresponding products in moderate-to-good yields. Control experiments