cobalt(III)-catalyzed cross-coupling/cyclization of aryl C–H bonds of N-nitrosoanilines with α-diazo-β-ketoesters has been achieved. This protocol features a unique combination of Csp2-H activation/Wolffrearrangement process, allowing for the rapid assembly of quaternary 2-oxindoles. The empirical evidence and density functional theory (DFT) calculations reveal the trapping process of transient acceptor ketene
Rhodium(<scp>iii</scp>)-catalyzed indole synthesis at room temperature using the transient oxidizing directing group strategy
作者:Yaping Shang、Krishna Jonnada、Subhash Laxman Yedage、Hua Tu、Xiaofeng Zhang、Xin Lou、Shijun Huang、Weiping Su
DOI:10.1039/c9cc04529e
日期:——
temperature have been developed using an in situ generated N-nitroso group as a transient oxidizing directinggroup. Due to mild reaction conditions, this method enabled synthesis of a broad range of N-alkyl indoles, including even two indole-based medicinal compounds. Our work disclosed the feasibility of the transient oxidizing directinggroup strategy in C–H functionalization reactions, which possesses
PS-SNAP was designed and evaluated as a practical nitrosating polymer-supported reagent for the nitrosation of sec-amines. Nitrosated dialkyl amines, alkyl anilines, and bis-anilines were obtained in good yields and high purities after shaking the corresponding amines in the presence of an excess of the newly described reagent followed by simple filtration and removal of solvents. (C) 2010 Elsevier Ltd. All rights reserved.