作者:Xiao-Shan Ning、Xin Liang、Kang-Fei Hu、Chuan-Zhi Yao、Jian-Ping Qu、Yan-Biao Kang
DOI:10.1002/adsc.201701512
日期:2018.4.17
A Pd‐tBuONO co‐catalyzed scalable and practical synthesis of indoles with molecular oxygen as terminal oxidant is developed. Either terminal or internal 2‐vinylanilines could be smoothly converted to desired indoles under one general condition. This method has been evaluated in the large scale synthesis of indomethacin and a potential anti‐breast cancer drug candidate 1.
synthesis of 2‐vinylanilines from the reaction of arylhydrazine hydrochlorides with alkenes and diethyl ketone via a rhodium‐catalyzed CHactivation is described. The oxidant‐free olefination reaction involves the in situ generation of an NNCR1R2 moiety as the oxidizingdirecting group thus providing an easy access to 2‐vinylanilines.
synthetic route could be readily scaled up to gram quantity without difficulty. Mechanistic studies have revealed that in situ formed selenium electrophile species may be the key intermediate for the selenocyclization process.
Metal-Free Activation of DMF by Dioxygen: A Cascade Multiple-Bond-Formation Reaction to Synthesize 3-Acylindoles from 2-Alkenylanilines
作者:Ji-Bo Wang、Yin-Long Li、Jun Deng
DOI:10.1002/adsc.201700584
日期:2017.10.4
cascade C−N, C−C and C−O multiple‐bond‐formationreaction to synthesize 3‐acylindoles from 2‐alkenylanilines with DMF (N,N‐dimethylformamide) as a one‐carbon synthon is described. This approach employed dioxygen as a terminal oxidant and oxygen donor, generally provided the 3‐acylindoles in moderate to good yields. Moreover, the mechanistic investigation unambiguously revealed that the 2‐carbon of 3‐acylindole
Iodine(III)‐Mediated Oxidation of Anilines to Construct Dibenzazepines**
作者:Carmen Margaret White、Naranchimeg Zorigt、Tianning Deng、Tom G. Driver
DOI:10.1002/chem.202301141
日期:2023.7.3
Cyclization: A mild, room temperature oxidative cyclization of 2-substituted anilines that accesses a broad range of medium-ring N-heterocycles via radical intermediates is reported.