Lewis Acid-Catalyzed Benzannulation of Vinyloxiranes with 3-Formylchromones or 1,4-Quinones for Diversely Functionalized 2-Hydroxybenzophenones, 1,4-Naphthoquinones, and Anthraquinones
作者:Jihwan Gim、Peter Yuosef M. Rubio、Sonaimuthu Mohandoss、Yong Rok Lee
DOI:10.1021/acs.joc.3c02554
日期:2024.2.16
involves cascade in situ diene formation, [4 + 2] cycloaddition, elimination, and ring-opening strategies. Moreover, it provides an expedited synthetic pathway to access biologically intriguing 1,4-naphthoquinones and anthraquinones including vitamin K3 and tectoquinone. The synthesized compounds also hold potential for use as UV filters and show promise as chemosensors for Cu2+ and Mg2+ ions.
描述了用于功能化 2-羟基二苯甲酮的区域选择性构建的简单且方便的方案。该方案涉及 Sc(OTf) 3 /BF 3 ·OEt 2催化 2-乙烯基环氧乙烷与 3-甲酰色酮的苯环化反应,其中涉及级联原位二烯形成、[4 + 2] 环加成、消除和开环策略。此外,它还提供了一种快速合成途径来获取生物学上有趣的 1,4-萘醌和蒽醌,包括维生素 K3 和 tectoquinone。合成的化合物还具有用作紫外线过滤剂的潜力,并有望作为 Cu 2+和 Mg 2+离子的化学传感器。