On the viability of 5-endo-dig cyclisations of O-propargylic hydroxylamine derivatives, leading to 2,5-dihydroisoxazoles (3-isoxazolines)
作者:Oliver F. Foot、David W. Knight、Ai Cheng Lilian Low、YingFa Li
DOI:10.1016/j.tetlet.2006.11.114
日期:2007.1
O-Propargylic hydroxylamines undergo smooth 5-endo-dig cyclisations upon exposure to 3 equiv of molecular iodine to give respectable yields of the corresponding 4-iodo-2,5-dihydroisoxazoles, which should find a number of applications as intermediates for syntheses amongst this useful class of heterocycles.
邻丙炔基羟胺在暴露于3当量的分子碘时会经历平滑的5-内切环化反应,从而获得可观的产率的相应的4-碘-2,5-二氢异恶唑,在该化合物中应找到许多用途作为中间体有用的杂环类。