Iron(III) Chloride/Diorganyl Diselenides-Promoted Regioselective Cyclization of Alkynyl Aryl Ketones: Synthesis of 3-Organoselenyl Chromenones under Ambient Atmosphere
作者:Benhur Godoi、Adriane Sperança、Cesar A. Bruning、Davi F. Back、Paulo Henrique Menezes、Cristina W. Nogueira、Gilson Zeni
DOI:10.1002/adsc.201100189
日期:2011.8
benign synthesis of 3-organoselenylchromenones was accomplished via iron(III) chloride/diorganyldiselenides-promoted intramolecular 6-endo-dig cyclization of alkynylarylketone derivatives. The cyclization reactions proceeded cleanly under mild reaction conditions, and the desired chromenone derivatives were smoothly isolated in good yields. The methodology proved to be highly regioselective, giving
Synthesis of chalcogen-functionalized 4<i>H</i>-chromen-4-ones <i>via</i> cyclization/chalcogenation of alkynyl aryl ketones mediated by Selectfluor®
作者:Thiago Anjos、Elba L. Gutterres、Daniela A. Barancelli、Roberta Cargnelutti、Benhur Godoi、Thiago Barcellos、Ricardo F. Schumacher
DOI:10.1039/d2nj05567h
日期:——
starting from diorganyl dichalcogenides and alkynyl aryl ketones has been developed. Selectfluor® mediates these cyclization/organochalcogenation reaction sequences under mild and open-to-air conditions. The six-memberedheterocycles were obtained via a selective 6-endo-dig cyclization compatible with the use of both diorganyl diselenides and disulfides. This synthetic methodology still proved to be