Formal [3 + 3] Cycloaddition Reactions between Electron-Deficient Cyclopropenes and Hydrazones: A Route to Alkyl 1,4,5,6-Tetrahydropyridazine-3-carboxylates
作者:Hengrui Huo、Runa A、Yuefa Gong
DOI:10.1021/acs.joc.8b03105
日期:2019.2.15
regioselective fashion and gave alkyl 1,4,5,6-tetrahydropyridazine-3-carboxylates in high yields under mild basic conditions. Treatment of the annulation products with DDQ leads to the formation of functionalized pyridazine-3-carboxylates, analogues of nicotinic acid ester.
开发了烷基2-芳酰基-1-氯环丙烷羧酸酯1和普通2之间的正式[3 + 3]环加成反应。该过程容易以非对映和区域选择性的方式进行,并在温和的碱性条件下以高收率得到了1,4,5,6-四氢哒嗪-3-羧酸烷基酯。用DDQ处理环状产物会导致形成功能化的哒嗪-3-羧酸盐(烟酸酯的类似物)。