Scaffold Preparation and Parallel Synthesis of Arrays of 5,6,7,8-Tetrahydropyrrolo-azepinones in the Solution Phase
作者:Leonarda Piras、Eva Genesio、Chiara Ghiron、Maurizio Taddei
DOI:10.1002/ejoc.200701024
日期:2008.6
into the corresponding (Z)-oxime which gave the pyrrolo-azepinone by Beckmann rearrangement in the presence of polyphosphoric acid. Trimethylaluminium-mediated amidation gave the corresponding amides which were finally N-alkylated at the 5-position to give 52 diverse (pyrrolo-azepinyl)acetamides, showing an appreciable exploration of the chemical space around the central heterocyclic core. (© Wiley-VCH
描述了用于平行制备 (oxo-pyrrolo-azepinyl) 乙酰胺阵列的吡咯-氮杂支架的有效合成。1,3-环己二酮与溴丙酮酸乙酯的 Stetter 环化反应是组装四氢苯并呋喃底物的关键反应,该底物在甘氨酸存在下通过微波辅助环缩合反应快速转化为四氢吲哚。然后将羰基立体选择性地转化为相应的 (Z)-肟,在多磷酸存在下通过贝克曼重排得到吡咯并-氮杂。三甲基铝介导的酰胺化得到相应的酰胺,最终在 5 位 N-烷基化得到 52 种不同的(吡咯并氮杂)乙酰胺,显示了对中央杂环核周围化学空间的可观探索。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)