Browsing University of Galway Support Services by Subject "zh systems"
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Nitrogen containing heterocycles from aldoximes; a one-pot route to isoxazolobenzodiazepinones, n-substituted and n-unsubstituted isoxazoloquinolinones
(Royal Society of Chemistry (RSC), 1998-01-01)The aldoximes 1 in the presence of electron poor olefins react to form either the 5,6,7-tricyclic isoxazolobenzodiazepinone 3 or the 5,6,6-tricyclic isoxazoloquinolinone 5 ring skeleton, In each case the ring system formed ... -
Pyrimidine annelated heterocycles - synthesis and cycloaddition of the first pyrimido[1,4]diazepine n-oxides
(Royal Society of Chemistry (RSC), 2001-01-01)5-Formyl- and 5-acetyl-4-(alkenylamino)pyrimidines 5 have been prepared as precursors to novel pyrimido[1,4]diazepine N-oxides 3. In addition to cyclisation to the targeted dipoles the substrates 5 have also been observed ... -
Steric control of reactivity: formation of oximes, benzodiazepinone n-oxides and isoxazoloquinolinones
(Royal Society of Chemistry (RSC), 1998-01-01)Reaction of the alkenyl carbonyl compounds 1 with hydroxylamine can lead to the formation of the oximes 2, the benzodiazepinone N-oxides 3 or the isoxazoloquinolinones 5. The product(s) of reaction are shown to depend on ...