Brønsted Acid-assisted Intramolecular Aminohydroxylation of N-Alkenylsulfonamides under Heavy Metal-free Conditions
摘要:
The intramolecular aminohydroxylation of N-alkenylsulfonamides proceeded under heavy metal-free conditions to give substituted prolinol derivatives in high yields. Oxone activated by catalytic Bronsted acid worked well as an electrophilic oxidant for this reaction.
Oxidative Intramolecular Bromo-Amination of <i>N</i>-Alkenyl Sulfonamides via Umpolung of Alkali Metal Bromides
作者:Katsuhiko Moriyama、Yuta Izumisawa、Hideo Togo
DOI:10.1021/jo201113r
日期:2011.9.2
The oxidative intramolecular bromo-amination of various N-alkenyl sulfonamides and N-alkenoxyl sulfonamides via umpolung of alkali metal bromides occurred exo-selectively to generate cyclic bromoamides in high yields with good diastereoselectivities. This method provided the desired products without elaborating the stoichiometric amount of corresponding organic waste.