Elemental Chalcogen (Se, S) in PEG-400 to the Synthesis of Seleno- and Thioflavones from 2-Chlorophenyl Ethynyl Ketone and Nucleophilic Species of Chalcogen
Synthesis of N-Alkyl-Substituted 4-Quinolones via Tandem Alkenyl and Aryl C-N Bond Formation
摘要:
N-Alkyl-substituted 4-quinolones are present as the key structural motif in many marketed drugs. An efficient one-step tandem amination approach was developed to afford N-alkyl-substituted 4-quinolones in high yields from easily accessible o-chloroaryl acetylenic ketones and functionalized alkyl amines. The approach complements and extends our previous work. Compared with other reported methods, the current method provides a very simple and convenient route.
Synthesis of Spiro-lactams and Polysubstituted Pyrroles via Ceric Ammonium Nitrate-Mediated Oxidative Cyclization of <i>N</i>-Furan-2-ylmethyl-β<i>-</i>Enaminones
Spiro-lactams and polysubstituted pyrroles were synthesized by reactions of furfurylamines with ynones followed by oxidation. Specifically, the protocol involved in situ generation of N-furan-2-ylmethyl-β-enaminones and their subsequent oxidation by ceric ammonium nitrate (6 equiv for spiro-lactam formation, 3 equiv for pyrrole formation). This useful dearomatizing oxidation, which likely proceeds via a
Stereoselective Synthesis of <i>Z</i>
-Vinyl Selenides Through the Reaction of Sodium Selenide with Organic Halides and Alkynes
作者:Renan P. Pistoia、Davi F. Back、Gilson Zeni
DOI:10.1002/ejoc.201900544
日期:2019.6.23
A stereoselectivesynthesis of Z‐vinyl selenides through the reaction of sodium selenide with organic halides, followed by the addition of alkynes was developed.