邻氨基苯酚衍生物的对映选择性铜催化形式的[4 + 2]与炔丙基酯的环加成反应,合成光学活性3,4-二氢-2 H -1,4-苯并恶嗪
摘要:
首次铜催化邻氨基苯酚衍生物与炔丙酸酯作为双亲电子C2合成子的不对称[4 + 2]环加成,用于立体选择性地构建手性2,3,4-三取代的2 H -1,4-苯并恶嗪轴承已经开发了环外双键。通过使用结构改性的手性酮亚胺P,N,N-配体,可以高收率和极好的对映选择性(高达97%ee)制备各种光学活性的2 H -1,4-苯并恶嗪。
One‐Pot Cascade Transformation of Glucal into Structurally Diverse Drug‐Like Scaffolds
作者:Hui Yao、Ronny Willam、Siming Wang、Jingxi He、Tai Guo、Xue‐Wei Liu
DOI:10.1002/asia.201900844
日期:2019.11.18
A diversity-oriented synthesis strategy to produce threetypes of structurally drug-like N-heterocyclic-fused rings has been developed from abundant biomass-derived d-glucal, aniline and water in a stereoselective manner. The overall transformation which entails a cascade of Ferrier reaction and 4π conrotatory imino-Nazarov cyclization was performed in one-pot allowing convenient preparation of scaffolds