Enantioselective Hydrogen Atom Transfer: Discovery of Catalytic Promiscuity in Flavin-Dependent ‘Ene’-Reductases
作者:Braddock A. Sandoval、Andrew J. Meichan、Todd K. Hyster
DOI:10.1021/jacs.7b05468
日期:2017.8.23
with flavoproteins used in organic synthesis. Here we describe the discovery of an enantioselective radical dehalogenation pathway for α-bromoesters using flavin-dependent ‘ene’-reductases. Mechanistic experiments support the role of flavin hydroquinone as a single electron reductant, flavin semiquinone as the hydrogen atom source, and the enzyme as the source of chirality.
黄素在生物环境中起单一电子还原剂的作用,但对于有机合成中使用的黄素蛋白很少观察到这种反应性。在这里,我们描述了使用黄素依赖性“烯”还原酶的α-溴代酸酯的对映选择性自由基脱卤途径的发现。机理实验支持黄素氢醌为单电子还原剂,黄素半醌为氢原子源,酶为手性源的作用。