作者:Milandip Karak、Jaime A. M. Acosta、Luiz C. A. Barbosa、John Boukouvalas
DOI:10.1002/ejoc.201600473
日期:2016.8
A concise and efficient synthesis of the marine natural products rubrolides B, I, K, and O was accomplished in 3–4 steps from commercially available 3,4-dichloro-2(5H)-furanone. Key steps include: (i) a site-selective Suzuki cross-coupling, (ii) a vinylogous aldol condensation, and (iii) a late-stage bromination. The latter reaction allowed functionalization of the aromatic rings in a highly regioselective
从市售的 3,4-二氯-2(5H)-呋喃酮中分 3-4 步完成了海洋天然产物 rubrolides B、I、K 和 O 的简洁高效合成。关键步骤包括:(i) 位点选择性 Suzuki 交叉偶联,(ii) 乙烯醇缩合,以及 (iii) 后期溴化。后一反应允许以高度区域选择性的方式对芳环进行官能化,从而能够从常见前体快速获得目标红内酯。