3,4,5-Trimethylphenol and Lewis Acid Dual-Catalyzed Cascade Ring-Opening/Cyclization: Direct Synthesis of Naphthalenes
作者:He Ma、Xiu-Qin Hu、Yong-Chun Luo、Peng-Fei Xu
DOI:10.1021/acs.orglett.7b03392
日期:2017.12.15
dual-catalyzed cascade reaction of donor–acceptor (D–A) cyclopropanes via ring-opening and cyclization is developed. In this reaction, a phenolic compound was used as a covalent catalyst for the first time. Additionally, control experiments proved that 3,4,5-trimethylphenol completed the catalytic cycle by accomplishing the C–C bond cleavage. Using this strategy, a wide variety of substituted naphthalenes has
通过开环和环化反应,开发了一种3,4,5-三甲基苯酚和路易斯酸双重催化的供体-受体(DA)环丙烷级联反应。在该反应中,酚类化合物首次被用作共价催化剂。另外,对照实验证明3,4,5-三甲基苯酚通过完成C–C键断裂而完成了催化循环。使用这种策略,在温和条件下,由D–A环丙烷以中等到高收率合成了各种各样的取代萘。