Palladium-Catalyzed Directed Carbon–Carbon Bond Activation of Aryl Nitriles for Cyano Transfer
作者:Lin Tan、Yang Pan、Qing-Ying Zeng、Zhen-Yu Wang、Hui Xu、Hui-Xiong Dai
DOI:10.1021/acs.orglett.4c00429
日期:2024.3.22
Herein, we report the C–H cyanation of indoles via a palladium-catalyzed directed C–CN activation reaction using aryl nitrile as a cyano source. The employment of the phenoxy-oriented group is the key to the cleavage of the C–CN bond. This protocol features a broad substrate scope, good efficiency, and high regioselectivity. Furthermore, the practical application of this protocol was showcased in the
copper-mediated complete cleavage and selective transformation of multiple inert chemical bonds of three easily available feedstocks, i.e., a sp2C—Hbond in indoles, three sp3C—H bonds and one C—Nbond in a methyl carbon atom in TMEDA, and the C≡N triple bond in CH3CN. This reaction proceeds via tandem carbon and nitrogen atom transfer, and allows for the direct and efficient cyanation of indoles, presenting a
Copper-Mediated Selective Cyanation of Indoles and 2-Phenylpyridines with Ammonium Iodide and DMF
作者:Jinho Kim、Hyunwoo Kim、Sukbok Chang
DOI:10.1021/ol301674m
日期:2012.8.3
Copper-mediated regioselective cyanation of indoles and 2-phenylpyridines was developed by using ammonium iodide and DMF as the combined source of a cyano unit under "Pd-free" conditions. Mechanistic studies indicate that the reaction of indoles proceeds through a two-step sequence: electrophilic initial iodination and then cyanation. The cyanation has a broad substrate scope, high functional group tolerance, and excellent regloselectivity.
Electrosynthesis of (hetero)aryl nitriles from α-imino-oxy acids <i>via</i> oxidative decarboxylation/N–O cleavage
作者:Hui-Shan Lin、Shu-Jun Chen、Jing-Mei Huang
DOI:10.1039/d2cc02986c
日期:——
A new method for the synthesis of (hetero)aryl nitriles via iminyl radicals has been developed through the electrochemical oxidativedecarboxylation of α-imino-oxy acids. This protocol provides an efficient approach to nitriles with a broad range of functional-group tolerance under ambient conditions and can be applied for one-pot gram-scale synthesis.