Nonyl Acridine Orange as a Prospective Photocatalyst in Chalcogenylation of Coumarins and Quinolinones
作者:Sindija Lapcinska、Pavels Dimitrijevs、Pavel Arsenyan
DOI:10.1021/acs.joc.2c01803
日期:2022.11.18
A mild and efficient method for preparation of 3-sulfenyl and 3-selenyl coumarins and quinolinones mediated by artificial light or sunlight is presented. The elaborated protocol highlights the use of nonyl acridine orange as a photocatalyst to generate a sulfenyl radical from thiols that is further trapped by a heterocycle. The utility of the protocol is justified by a diverse scope of thiols, including
提出了一种通过人工光或日光介导制备 3-硫基和 3-硒基香豆素和喹啉酮的温和有效的方法。详细的协议强调使用壬基吖啶橙作为光催化剂从硫醇中产生硫基自由基,该自由基进一步被杂环捕获。该协议的实用性由各种不同的硫醇范围证明是合理的,包括短的含半胱氨酸的肽。相同的反应条件可用于制备3-硒基香豆素和喹啉酮。成功利用了各种受保护和未受保护的含硒代半胱氨酸的肽,证明了对具有敏感基团(Arg、Lys、Trp、His 和 Tyr)的氨基酸的高度耐受性。