O-Alkenyl Hydroxylamines: A New Concept for Cyclofunctionalization
摘要:
Treatment of O-homoallylhydroxylamines with palladium(II) and copper(II) in the presence of a base, methanol, and carbon monoxide results in the formation of isooxazolidines. An electron-withdrawing group on the hydroxylamine nitrogen is essential. When carbamate groups are used the products are formed exclusively as their cis isomers.
Stereoselective Synthesis of Isoxazolidines via Copper-Catalyzed Alkene Diamination
作者:Zainab M. Khoder、Christina E. Wong、Sherry R. Chemler
DOI:10.1021/acscatal.7b01362
日期:2017.7.7
A convenient copper-catalyzed intramolecular/intermolecular alkene diamination reaction to synthesize 3-aminomethyl-functionalized isoxazolidines under mild reaction conditions and with generally high levels of diastereoselectivity was achieved. This reaction demonstrates that previously underutilized unsaturated carbamates are good [Cu]-catalyzed diamination substrates. Sulfonamides, anilines, benzamide