Base-assisted intramolecular 6-acetoxypyranone-acetylene [5+2] cycloaddition. Synthesis and reactivity of novel oxa-tricyclo[5.3.1.01,5]undecenones
作者:Sylvain Celanire、Frederic Marlin、Jack E. Baldwin、Robert M. Adlington
DOI:10.1016/j.tet.2005.01.113
日期:2005.3
11-dioxatricyclo[5.3.1.01,5]undeca-5,9-dien-8-ones is reported from suitable 5-substituted furfuryl alcohols bearing an acetylenic side-chain. Successive peracid-mediated oxidative rearrangement of furan carbinols and base-assisted intramolecular 1,3-dipolar cycloaddition afforded oxygen-bridged tricyclo-undecane derivatives. Stereoselective transformations of cycloadducts are also discussed.
据报道,合适的带有乙炔侧链的5-取代的糠醇可合成3,11-二氧杂三环[5.3.1.0 1,5 ] undeca -5,9-dien-8-。呋喃甲醇的过酸介导的连续氧化重排和碱辅助的分子内1,3-偶极环加成反应提供了氧桥联的三环十一烷衍生物。还讨论了环加合物的立体选择性转化。