efficient inverse electron-demand aza-Diels–Alder reaction of cyclic enamides and 1,2-diaza-1,3-dienes, which could be readily formed in situ from α-halogeno hydrazones and a base, has been successfully developed. With the developed approach, a wide range of fused polycyclic tetrahydropyridazines were smoothly obtained in up to 99% yield under benign reaction conditions. This reaction concept was also extended
环状烯酰胺和 1,2-二氮杂-1,3-二烯的高效逆向电子需求 aza-Diels-Alder 反应已成功开发,该反应可以很容易地由 α-卤代腙和碱原位形成。使用所开发的方法,在良性反应条件下,以高达 99% 的产率顺利获得了范围广泛的稠合多环四氢
哒嗪。该反应概念也扩展到无环烯酰胺底物以获取
1,4,5,6-四氢哒嗪。还进行了多环四氢
哒嗪产品的克级实验和进一步衍生化,以验证该方法的实用性。