Metal free decarboxylative aminoxylation of carboxylic acids using a biphasic solvent system
作者:Göran Schulz、Andreas Kirschning
DOI:10.1039/d0ob01773f
日期:——
The smooth oxidative radical decarboxylation of carboxylic acids with TEMPO and other derivatives as radical scavengers is reported. The key to success was the use of a two-phase solvent system to avoid otherwise predominant side reactions such as the oxidation of TEMPO by persulfate and enabled the selective formation of synthetically useful alkoxyamines. The method does not require transition metals
Synthesis of 2-Substituted Pyrrolidine Nitroxide Radicals
作者:Szilvia Gadányi、Tamás Kálai、József Jekö、Zoltán Berente、Kálmán Hideg
DOI:10.1055/s-2000-8727
日期:——
Grignard reaction of nitrone 1 with arylmagnesium bromides afforded different pyrrolidine nitroxide radicals 2a-f, which were converted further to spin labelled ebselen 6, saccharine 11, phenols 5, 12, 13, quinone 16 and heterocycles 20, 21, 24. Paramagnetic sulfonyl chlorides 7a, 7b, 9a and methanethiosulfonate 25d capable of amino and thiol labelling, respectively, were also prepared.