1,3-Dipolar Cycloaddition−Decarboxylation Reactions of an Azomethine Ylide with Isatoic Anhydrides: Formation of Novel Benzodiazepinones
作者:Nadia Spiccia、Jose Basutto、Pawel Jokisz、Leon S.-M. Wong、Adam G. Meyer、Andrew B. Holmes、Jonathan M. White、John H. Ryan
DOI:10.1021/ol102824k
日期:2011.2.4
substituted isatoic anhydrides to afford novel 1,3-benzodiazepin-5-one derivatives, which are generally isolated in high yield. The transformations involve 1,3-dipolar cycloaddition reactions of the ylide with the anhydrides to give transient, and in a representative case spectroscopically observable, oxazolidine intermediates that undergo ring-opening−decarboxylation−ring-closing reaction cascades to
不稳定的偶氮甲亚胺叶立德与各种取代的等角酸酐反应,得到新的1,3-苯并二氮杂-1-基五酮衍生物,通常以高收率分离。转化涉及叶立德与酸酐的1,3-偶极环加成反应,以产生瞬态,在光谱学上可观察到的典型情况下,恶唑烷中间体经历开环-脱羧-闭环反应级联反应生成1,3-苯并二氮杂-5-酮产品。