X=Y-ZH systems as potential 1,3-dipoles. Part 32 generation of nitrones from oximes. Tandem Michael addition-1,3-dipolar cycloaddition reactions. Background and class 1 processes.
作者:Ronald Grigg、Frances Heaney、Sivagnanasundram Surendrakumar、William J. Warnock
DOI:10.1016/s0040-4020(01)87116-7
日期:1991.1
keto nitrones can be trapped in regiospecific intermolecular cycloadditionreactions giving single cycloadducts in good yield. Chemospecific 1:1:1 cycloadducts are obtained from ketoximes, monosubstituted electronegative olefins (Michael acceptor) and N-methylmaleimide (dipolarophile), whilst the chemoselectivity of the corresponding reactions with aldoximes is dependent on the oxime stereochemistry.