Palladium(II) chloride-catalysed cascade cyclisationâcycloaddition reactions of δ-alkenyl oximes occur regio- and facially-specifically in high yield via intermediate six-membered cyclic nitrones; preliminary studies of γ-alkenyl oximes show they are reluctant to cyclise; four potential synthetic variants of the cascade process are identified and examples of two of the classes are provided.
氯化钯(II)催化的δ-烯基
肟级联环化和环加成反应通过中间的六元环
硝酸酯以高产率实现了区域和表面特异性;对δ-烯基
肟的初步研究表明,它们不愿发生环化;确定了级联过程的四种潜在合成变体,并提供了其中两类变体的实例。