Copper-Mediated [3+2] Annulation of 3-<i>N</i>
-Hydroxyallylamines with Nitrosoarenes
作者:Satish Ghorpade、Prakash D. Jadhav、Rai-Shung Liu
DOI:10.1002/chem.201504784
日期:2016.2.24
of N‐hydroxyaminoallyl radicals with nitrosoarenes. Our mechanistic analysis opposes a 5‐endo‐trig cyclization involved in the final ring‐closure step. To manifest the reaction utility, chemical elaborations of resulting isoxazolidinyl products into 2‐ or 3‐substituted quinoline N‐oxides and acyclic 1,3‐diamino‐2‐ols are also described.
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
N<sub>2</sub>H<sub>4</sub>–H<sub>2</sub>O Enabled Umpolung Cyclization of <i>o</i>-Nitro Chalcones for the Construction of Quinoline <i>N</i>-Oxides
作者:Guan Zhang、Kai Yang、Shihui Wang、Qiang Feng、Qiuling Song
DOI:10.1021/acs.orglett.0c04162
日期:2021.1.15
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