Readily prepared 2-alkyl-2-azidopropylcycloalkyl-1,3-diones undergo intramolecular Schmidt rearrangement with a range of hard Lewis acids, leading to indolizidinediones and pyrroloazepinediones. Chiral aluminium-based Lewis acids could also be used to mediate this symmetry-breaking transformation, but no significant asymmetric induction was observed.
容易制备的 2-烷基-2-
叠氮丙基环烷基-1,3-二酮与一系列硬
路易斯酸发生分子内施密特重排反应,生成
吲哚二酮和
吡咯氮杂环二酮。手性铝基
路易斯酸也可用于介导这种打破对称性的转化,但没有观察到明显的不对称诱导。