Gold-Catalyzed Addition of Carbon Nucleophiles to Propargyl Carboxylates
摘要:
Propargyl carboxylates react with 1,3-dicarbonyl compounds and electron-rich arenes in the presence of Au(l) catalysts to give enol carboxylates via alpha,beta-unsaturated Au(l) carbenes or Au(l)-coordinated allenes formed by 1,2- or 1,3-acyl migration, respectively.
A novel tandem synthesis of β-keto enolethers was developed via the reaction of α-diazoketones, 1,3-diketones and THF catalyzed by cheap and available CuI under extremely simple conditions. During the course of the reaction, the ring-opened THF and diazocarbonyl derived carbene simultaneously inserted into O-H of 1,3-diketones.
Ionic liquid/boronic acid system enabled deuteration with D2O
作者:Bin Liu、Guanyu Wang、Zhenhao Xu、Menglin Wang、Yangleiyu Nie、Zhibin Luo
DOI:10.1016/j.tetlet.2022.153968
日期:2022.7
The development of transition-metal free systems for multi-sites deuteration is important for the preparation of deuterium-labeled drugs and intermediates. We reported that ionic liquid [bmim]PF6 was able to promote highly efficient deuterodeborylation of boronic acids with D2O. The ionic liquid/boronic acid system was successfully applied to the selective H/D exchange at various sp2/sp3 CH positions
开发用于多位点氘化的无过渡金属系统对于氘标记药物和中间体的制备具有重要意义。我们报道了离子液体[bmim]PF 6能够促进硼酸与D 2 O 的高效氘去硼酸化反应。离子液体/硼酸体系成功地应用于不同sp 2 /sp 3 C条件下的选择性H/D 交换。 H 职位。此外,观察到离子液体中含氮杂芳烃的异常亲核行为。