Recently we created the novel indolylprodigiosin derivative 2 (obatoclax) and demonstrated its ability to antagonize multiple members of the B-cell lymphoma (Bcl) family of antiapoptotic proteins. The compound has shown potent anticancer activity in several animal tumor models. Obatoclax is now in Phase 1b and 2 clinical trials directed against multiple hematologic and solid tumor malignancies. To support its clinical development, a new scalable synthesis was required. Obatoclax has been prepared using a three-step synthesis, starting from commercially available 4-methoxy-3-pyrrolin-2-one. The reaction sequence involves a haloformylation reaction followed by a Suzuki cross-coupling reaction with an indole-2-boronic acid. The synthesis is completed by an acid-mediated condensation with 2,4-dimethyl-1H-pyrrole.
Trisoxazoline/Cu(II)-catalyzed asymmetric intramolecular Friedel–Crafts alkylation reaction of indoles
Intramolecular Friedel–Crafts alkylationreaction of indoles catalyzed by trisoxazoline/copper(II) is described. This annulation provides an easy access to polycyclic indole derivatives with up to 90% ee in up to 99% yield.
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。