Novel preparation of N-arylmethyl-N-arylmethyleneamine N-oxides from benzylic bromides with zinc and isobutyl nitrite
作者:Kei Yanai、Hideo Togo
DOI:10.1016/j.tet.2019.05.012
日期:2019.6
Treatment of benzylic bromides with Zn and LiCl, followed by the reaction with i-butyl nitrite gave N-arylmethyl-N-arylmethyleneamine N-oxides in moderate yields. The present reaction is a novel and simple method for the preparation of nitrones from benzylic bromides, although the yields are moderate.
photocatalytic aerobic oxidative dehydrogenation reactions of N,N-disubstituted hydroxylamines to nitrones were developed with an in situ generated photocatalyst based on commercially available 3,6-dichlorotetrazine. This process affords a wide range of nitrones in high yields under mild conditions. In addition, an oxidative (3+3) cycloaddition between an oxyallyl cation precursor and a hydroxylamine was also developed
Cyanoanthracene-sensitized photooxidations of N,N-dibenzylhydroxylamine and its derivatives; observation of the Marcus ‘inverted region’ in back electron transfer within geminate radical ion pairs
Back electrontransferwithingeminateradicalionpairs formed by electrontransfer from the title hydroxylamines to singlet 9-cyano- and 9,10-dicyano-anthracenes in acetonitrile is shown to occur in the Marcus ‘invertedregion’ and ‘normal region’, respectively.