The Diels–Alder reactions of para-benzoquinone nitrogen-derivatives: an experimental and theoretical study
作者:Marciana P. Uliana、Bruno M. Servilha、Olga Alexopoulos、Kleber T. de Oliveira、Cláudio F. Tormena、Marco A.B. Ferreira、Timothy J. Brocksom
DOI:10.1016/j.tet.2014.07.088
日期:2014.9
An experimental and theoreticalstudy of the comparative reactivity and selectivity of the Diels–Alder reactions of para-benzoquinones and three nitrogen derivatives have been performed. The mono-oximes derivatives do not react under the tested reaction conditions, whereas the tosylated mono-oximes react slowly. However, the mono N-tosyl imines show excellent reactivity, and superior to the parent
Halogenation of N-substituted p-quinone monoimines and p-quinone monooxime ethers: XV. Synthesis and bromination of 4-(cinnamoyloxyimino)-cyclohexa-2,5-dienones
作者:S. A. Konovalova、A. P. Avdeenko、S. A. Goncharova
DOI:10.1134/s1070428016070034
日期:2016.7
New 4-(cinnamoyloxyimino)cyclohexa-2,5-dien-1-ones were synthesized, and their bromination afforded bromine addition products to the syn- and anti-C=C bonds of the quinoid ring. In all cases, bromine addition to the C=C double bond of the cinnamoyl fragment was observed.