Site-Selective C8-Alkylation of Quinoline <i>N</i>-Oxides with Maleimides under Rh(III) Catalysis
作者:Won An、Suk Hun Lee、Dayoung Kim、Harin Oh、Suho Kim、Youjung Byun、Hyun Jin Kim、Neeraj Kumar Mishra、In Su Kim
DOI:10.1021/acs.joc.1c00612
日期:2021.6.4
modification of quinolines and their analogs has emerged as a pivotal topic in medicinal chemistry and drug discovery. Herein, we describe the rhodium(III)-catalyzed C8-alkylation of quinoline N-oxides with maleimides as alkylating agents, resulting in the formation of bioactive succinimide-containing quinoline derivatives. The reaction proceeds under mild conditions with complete functional group tolerance
Scaffold hopping by net photochemical carbon deletion of azaarenes
作者:Jisoo Woo、Alec H. Christian、Samantha A. Burgess、Yuan Jiang、Umar Faruk Mansoor、Mark D. Levin
DOI:10.1126/science.abo4282
日期:2022.4.29
Discovery chemists routinely identify purpose-tailored molecules through an iterative structural optimization approach, but the preparation of each successive candidate in a compound series can rarely be conducted in a manner matching their thought process. This is because many of the necessary chemical transformations required to modify compound cores in a straightforward fashion are not applicable
Carbon-to-nitrogen single-atom transmutation of azaarenes
作者:Jisoo Woo、Colin Stein、Alec H. Christian、Mark D. Levin
DOI:10.1038/s41586-023-06613-4
日期:2023.11.2
enables the direct conversion of a heteroaromatic carbon atom into a nitrogenatom, turning quinolines into quinazolines. Oxidative restructuring of the parent azaarene gives a ring-opened intermediate bearing electrophilic sites primed for ring reclosure and expulsion of a carbon-based leaving group. Such a ‘sticky end’ approach subverts existing atom insertion–deletion approaches and as a result avoids
Herein, we describe a metal-free methodology using Selectfluor with disulfane, for the deoxygenation of N-heterocyclic N-oxides (33 examples). This effective, robust, and simple methodology enables the synthesis of various deoxygenated analogues from a wide range of N-heterocyclic N-oxide cores at room temperature in short reaction times with quantitative yields.