作者:Li, Pei、Shi, Maoqing、Yang, Kaixin、Jing, Tongfei、Kang, Zhenghui、Hu, Wenhao、Qian, Yu
DOI:10.1021/acs.orglett.4c01956
日期:——
A rhodium-catalyzed highly stereoselective formal [2 + 4]-cycloaddition reaction of α-diazo pyrazoleamides and 2-aminophenyl ketones that produces 4-hydroxy-2-quinolinones in good yields with excellent diastereoselectivities has been developed. A pyrazolium ylide species that is generated from α-diazo pyrazoleamides is used as a C2 synthon for this cycloaddition. This protocol offers an efficient approach
开发了一种铑催化的α-重氮吡唑酰胺和2-氨基苯基酮的高度立体选择性形式[2 + 4]-环加成反应,该反应以良好的收率和优异的非对映选择性生成4-羟基-2-喹啉酮。由 α-重氮吡唑酰胺产生的吡唑叶立德物种被用作该环加成的 C2 合成子。该方案为具有连续四级中心的各种 4-羟基-2-喹啉酮提供了一种有效的方法。