Hydrozirconation of 1-hexyne, the addition to in situ prepared N-acyliminium species, and ring-closing metathesis (RCM) were key steps in the preparation of a tricyclic isoindolinone scaffold. An unusual alkene isomerization process during the RCM was identified and studied in some detail. Chemical diversification for library synthesis was achieved by a subsequent alkene epoxidation and zinc-mediated aminolysis reaction. The resulting library products provided selective hits among a large number of high-throughput screens reported in PubChem, thus illustrating the utility of the novel scaffold.
1-己炔的
水合
锆化反应,对现场制备的N-
酰亚胺物种的加成,以及环闭合亚烯交换反应(RCM)是制备
三环异
吲哚酮骨架的关键步骤。在RCM过程中发现并详细研究了一种不寻常的烯烃异构化过程。通过随后的烯烃环氧化和
锌介导的胺解反应实现了
化学多样性,用于合成化合物库。由此产生的化合物库产品在PubChem报告的大量高通量筛选中提供了选择性命中,从而展示了新型骨架的实用性。