Synthesis of 1,2-Dihydroquinolines via Hydrazine-Catalyzed Ring-Closing Carbonyl-Olefin Metathesis
作者:Yunfei Zhang、Jae Hun Sim、Samantha N. MacMillan、Tristan H. Lambert
DOI:10.1021/acs.orglett.0c02116
日期:2020.8.7
The synthesis of 1,2-dihydroquinolines by the hydrazine-catalyzed ring-closing carbonyl-olefin metathesis (RCCOM) of N-prenylated 2-aminobenzaldehydes is reported. Substrates with a variety of substitution patterns are shown. With an acid-labile protecting group on the nitrogen atom, in situ deprotection and autoxidation furnish quinoline. In comparison with related oxygen-containing substrates, the
报道了通过N-异戊二烯基化 2-氨基苯甲醛的肼催化闭环羰基-烯烃复分解 (RCCOM) 合成 1,2-二氢喹啉。显示了具有多种替代模式的基材。氮原子上带有酸不稳定的保护基团,原位脱保护和自动氧化得到喹啉。与相关的含氧底物相比,催化循环的环加成步骤较慢,但发现环化更容易。