Halogenation of the 3-position of pyridines through Zincke imine intermediates
作者:Benjamin T. Boyle、Jeffrey N. Levy、Louis de Lescure、Robert S. Paton、Andrew McNally
DOI:10.1126/science.add8980
日期:2022.11.18
required for drug and agrochemical development. However, despite more than a century of synthetic endeavors, halogenation processes that selectively functionalize the carbon–hydrogen bond in the 3-position of a broad range of pyridine precursors remain largely elusive. We report a reaction sequence of pyridyl ring opening, halogenation, and ring closing whereby the acyclic Zincke imine intermediates