<i>ortho</i> and remote metalation – cross coupling strategies. Total synthesis of the naturally occurring fluorenone dengibsinin and the azafluoranthene alkaloid imeluteine
作者:J. -m. Fu、B. -p. Zhao、M. J. Sharp、V. Snieckus
DOI:10.1139/v94-035
日期:1994.1.1
The total synthesis of the naturally occurring fluorenone, dengibsinin (7a), and the azafluoranthene alkaloid, imeluteine (30e), is described. Using combined ortho metalation – crosscouplingsequences that terminate in Friedel–Crafts (18b → 6d) and remote metalation (21a,b → 6c,d) reactions, the synthesis of fluorenone dimethyl ethers 6c and 6d is reported. 6c and 6d were shown not to be identical
11C-, 12C-, and 13C-cyanation of electron-rich arenes via organic photoredox catalysis
作者:Xuedan Wu、Wei Chen、Natalie Holmberg-Douglas、Gerald Thomas Bida、Xianshuang Tu、Xinrui Ma、Zhanhong Wu、David A. Nicewicz、Zibo Li
DOI:10.1016/j.chempr.2022.12.007
日期:2023.2
agents, which requires the development of simple and efficient radiolabeling methods in many cases. As bioisosteres for halogen and carbonyl moieties, nitriles are important functional groups in pharmaceutical and agrochemical compounds. Here, we disclose a mild organophotoredox-catalyzed method for efficient cyanation of a broad spectrum of electron-rich arenes, including abundant and readily available