作者:Subas M. Sakya、Andrew C. Flick、Jotham W. Coe、David L. Gray、Sidney Liang、Fabiola Ferri、Michel Van Den Berg、Kees Pouwer
DOI:10.1016/j.tetlet.2011.11.129
日期:2012.2
syntheses of versatile intermediate azepinones 2 and 3 are described. A 6-step intramolecular Dieckmann cyclization and decarboxylation led to the intermediate 3 while an alternate 4-step synthesis of 2 was developed and used for scale-up. The highlight of the second synthesis is the one-step per-bromination/elimination protocol from readily available azepinone 13a to provide a versatile scaffold in
描述了通用中间体intermediate杂酮2和3的两种合成。6步分子内Dieckmann环化和脱羧反应生成中间体3,同时开发了2的交替4步合成方法,并用于规模放大。第二个合成的重点是易于获得的a庚酮13a的一步溴化/消除步骤,以提供乙烯基溴化物5中的多用途支架,从而能够在芳基部分周围形成SAR。还描述了中间体2向杂芳基a庚酮精细化的实例。