protocol for direct C–H alkylation and acylation of N-heterocycles, using readily accessible carboxylic acids as radical precursors under visible-light irradiation without a photocatalyst and an additional acid additive, has been developed. This protocol provides expedient access to substituted N-heterocycles under mild and metal-free conditions. Mechanistic experiments indicate that this reaction proceeds
Rapid synthesis of polysubstituted phenanthridines from simple aliphatic/aromatic nitriles and iodo arenes <i>via</i> Pd(<scp>ii</scp>) catalyzed domino C–C/C–C/C–N bond formation
An efficient and straightforward method has been developed for the synthesis of polysubstituted phenanthridines from simple aryl iodides and alkyl/aryl nitriles via the palladium-catalyzed nucleophilic addition of aryl iodides to nitriles followed by cascade formation of C–C and C–N bonds viz. in situ generated imine directed sequential two fold C–H activation.
Aerobic cross-dehydrogenative couplings of N-heteroarenes with toluene derivatives at room temperature
作者:Qiao-Lin Wang、Huawen Huang、Zhaozhao Sun、Yufeng Chen、Guo-Jun Deng
DOI:10.1039/d1gc02547c
日期:——
A set of mild aerobic cross-dehydrogenativecouplings of N-heteroarenes with the benzylic C(sp3)–H bond has been achieved by using visible-light-induced photocatalysis. This approach was found to provide a sustainable alternative to Minisci benzylation reactions using readily accessible toluene derivatives as benzylating agents. The unique combination of photocatalysis, bromo radical mediation, and