Metal and Oxidant-Free Brønsted Acid-Mediated Cascade Reaction to Substituted Benzofurans
作者:Giacomo Mari、Cecilia Ciccolini、Lucia De Crescentini、Gianfranco Favi、Stefania Santeusanio、Michele Mancinelli、Fabio Mantellini
DOI:10.1021/acs.joc.9b01363
日期:2019.9.6
Substituted hydroxy-benzofurans are easily accessible by treatment of resorcinols and 1,2-diaza-1,3-dienes (DDs) under acidic conditions. The reaction happens through an uncommon Michael reaction between aromatic derivatives as aromatic C(sp2)–H nucleophiles and DDs as acceptors. Also, the behavior of different phenols and 2-naphthol was investigated.
The Rational Design and Atroposelective Synthesis of Axially Chiral C2‐Arylpyrrole‐Derived Amino Alcohols
作者:Tian‐Jiao Han、Zheng‐Xu Zhang、Min‐Can Wang、Li‐Ping Xu、Guang‐Jian Mei
DOI:10.1002/anie.202207517
日期:2022.9.5
biaryl amino alcohol scaffold, NPNOL, has been rationally designed. For the enantioselectivesynthesis of NPNOL, the chiral phosphoric acid catalyzed asymmetric Attanasi reaction was utilized. Density functional theory calculations were performed to reveal the reaction mechanism and the origins of the enantioselectivity. NPNOL could serve as a new platform for the development of chiral ligands and catalysts
A Novel Solvent-Free Approach to Imidazole Containing Nitrogen-Bridgehead Heterocycles
作者:Orazio A. Attanasi、Luca Bianchi、Linda A. Campisi、Lucia De Crescentini、Gianfranco Favi、Fabio Mantellini
DOI:10.1021/ol4015267
日期:2013.7.19
A very simple domino reaction under solvent-free conditions of various pyridine-like heterocycles with 1,2-diaza-1,3-dienes produces in good yields imidazo[1,2-a]pyridines, imidazo[1,2-a]quinolines, and imidazo[2,1-a]isoquinolines. The advantage of this one-pot transformation lies in the use of simple pyridine-like compounds without prefunctionalization of the starting heterocycles.