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The influence of oxime stereochemistry in the generation of nitrones from ω-alkenyloximes by cyclization or 1,2-prototropy
(Royal Society of Chemistry (RSC), 1998-01-01)
Thermally induced cyclization of the anti-alkenyl oximes E-7a,b and E-17a,b affords cyclic alpha-alkoxycarbonylnitrones 8 and the 6,7-bicyclic nitrones 18, respectively, The syn-oximes Z-7b and Z-17b react via an alternate ...
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 ...
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 ...