Intramolecular Cycloaddition Reactions of <i>cis</i>-1,2-Dihydrocatechol Derivatives Incorporating C3-Tethered Diazoketones, Nitrile Oxides, and Azides: Stereocontrolled Routes to Enantiomerically Pure Spiro[5.5]undecanes and Related Systems
作者:Tristan A. Reekie、Martin G. Banwell、Anthony C. Willis
DOI:10.1021/jo400952u
日期:2013.7.19
incorporating C3-tethered diazoketone, nitrile oxide, or azide residues has been prepared from the precursor iodide 7 using Negishi cross-coupling reactions. Such derivatives, including diazoketone 12, participate in regio- and stereo-selective intramolecular cycloaddition reactions to give adducts, for example, 15, that are readily elaborated to spiro[5.5]undecanes such as 18.
使用Negishi交叉偶联反应,从前体碘化物7制备了一系列对映体纯的顺式-1,2-二氢邻苯二酚衍生物,其中并入有C3链状的重氮酮,氧化腈或叠氮化物残基。这样的衍生物,包括重氮酮12,参与区域和立体选择性分子内环加成反应,生成加合物,例如15,这些加合物很容易合成成螺[5.5]十一烷,例如18。