Site-Selective Silver-Catalyzed C–H Bond Deuteration of Five-Membered Aromatic Heterocycles and Pharmaceuticals
作者:Adrian Tlahuext-Aca、John F. Hartwig
DOI:10.1021/acscatal.0c04917
日期:2021.2.5
pharmaceutical ingredients that have been resistant to catalytic H/D exchange. The reactions occur with CH3OD as a low-cost source of the isotope. The silver catalysts react with five-membered heteroarenes lacking directing groups, tolerate a wide range of functional groups, and react in both polar and nonpolar solvents. Mechanistic experiments, including deuterium kinetic isotope effects, determination of kinetic
将氢同位素直接引入有机分子的催化方法对于改进药物的开发以及改变它们的吸收、分布、代谢和排泄 (ADME) 特性至关重要。然而,在实际条件下,在没有导向基团的情况下,开发用于选择性掺入同位素的均相催化剂仍然是一个长期存在的挑战。在这里,我们展示了膦配位的碳酸银复合物催化五元芳族杂环和对催化 H/D 交换具有抗性的活性药物成分中 C-H 键的位点选择性氘化。与 CH 3发生反应OD 作为同位素的低成本来源。银催化剂与缺乏导向基团的五元杂芳烃反应,耐受多种官能团,可在极性和非极性溶剂中反应。机械实验,包括氘动力学同位素效应、动力学顺序的确定和催化剂静止状态的识别,支持从膦配位的碳酸银中间体裂解 C-H 键作为催化循环的速率决定步骤。