Iron-catalyzed aerobic difunctionalization of alkenes: a highly efficient approach to construct oxindoles by C–S and C–C bond formation
作者:Tao Shen、Yizhi Yuan、Song Song、Ning Jiao
DOI:10.1039/c4cc00401a
日期:——
A novel iron-catalyzed efficient approach to construct sulfone-containing oxindoles, which play important roles in the structural library design and drug discovery, has been developed. The use of readily available benzenesulfinic acids, an inexpensive iron salt as the catalyst, and air as the oxidant makes this sulfur incorporation protocol very efficient and practical.
Iron-catalysed radical cyclization to synthesize germanium-substituted indolo[2,1-<i>a</i>]isoquinolin-6(5<i>H</i>)-ones and indolin-2-ones
作者:Yani Luo、Tian Tian、Yasushi Nishihara、Leiyang Lv、Zhiping Li
DOI:10.1039/d1cc03907e
日期:——
A simple and efficient iron-catalysed radical cyclization to synthesize germanium-substituted indolo[2,1-a]isoquinolin-6(5H)-ones and indolin-2-ones has been developed.
Visible-light-induced and iron-catalyzed methylation of N-arylacrylamides with dimethyl sulphoxide: a convenient access to 3-ethyl-3-methyl oxindoles
作者:Zuguang Xie、Pinhua Li、Yu Hu、Ning Xu、Lei Wang
DOI:10.1039/c7ob00779e
日期:——
A visible-light-induced and iron-catalyzed methylation of arylacrylamides by dimethyl sulphoxide (DMSO) is achieved, leading to 3-ethyl-3-methyl indolin-2-ones in high yields. This reaction tolerates a series of functional groups, such as methoxy, trifluoromethyl, cyano, nitro, acetyl and ethyloxy carbonyl groups. The visible-light promoted radical methylation and arylation of the alkenyl group are
The catalyst-free electrochemical di- and trifluoromethylation/cyclization of N-substituted acrylamides was realized under external oxidant-free conditions. The strategy provides expedient access to fluoroalkylated oxindoles and 3,4-dihydroquinolin-2(1H)-ones with ample scope and broad functional group tolerance by mild, direct electrolysis of sodium sulfinates in an undivided cell. Detailed mechanistic