The β-nitroxyalkyl and β-sulfonatoxyalkyl radical rearrangements
摘要:
The first examples of the migration of nitrate and sulfonate esters in beta-nitroxyalkyl and beta-sulfonatoalkyl radicals are presented: crossover and labelling experiments are used to determine the migrating group and the intramolecular nature of the rearrangement.
An efficient bromination of alkenes using cerium(IV) ammonium nitrate (CAN) and potassium bromide
作者:Vijay Nair、Sreeletha B Panicker、Anu Augustine、Tesmol G George、Siji Thomas、M Vairamani
DOI:10.1016/s0040-4020(01)00712-8
日期:2001.8
Bromination of alkenes using a combination of potassium bromide and cerium(iv) ammoniumnitrate (CAN) in a two phase system consisting of water and dichloromethane affords the corresponding dibromides in excellent yield. The reaction most likely involves the addition of the bromine radical generated from bromide ion by CAN and subsequent formation of the dibromide.
Copper Nitrate‐Mediated Selective Difunctionalization of Alkenes: A Rapid Access to β‐Bromonitrates
作者:Mingchun Gao、Kaijing Zhou、Bin Xu
DOI:10.1002/adsc.201900016
日期:2019.4.23
A regioselectivecopper nitrate‐mediated difunctionalization of alkenes has been developed for the rapid synthesis of β‐bromonitrates, where copper nitrate is used as an ideal nitrooxy source for the first time and the products will find many applications in organic synthesis as versatile synthons. Different from the general reports that copper nitrate acts as the nitro source, the given protocol provides
CAN-Mediated Oxidative Free Radical Reactions in an Ionic Liquid
作者:Gregory Bar、Fabien Bini、Andrew F. Parsons
DOI:10.1081/scc-120015703
日期:2003.3
Abstract Cerium(IV) ammonium nitrate-mediated oxidative radical reactions are carried out in the presence of ionic liquids, including 1-butyl-3-methylimidazolium tetrafluoroborate, for the first time. The presence of the ionic liquid not only increases the rate and yield of reactions in dichloromethane but also extends the range of 1,3-dicarbonyl precursors, which can be utilized in these carbon–carbon