Ortho-Selective Hydrogen Isotope Exchange of Phenols and Benzyl Alcohols by Mesoionic Carbene-Iridium Catalyst
作者:Liang-Liang Zhao、Yixin Wu、Shiqing Huang、Zengyu Zhang、Wei Liu、Xiaoyu Yan
DOI:10.1021/acs.orglett.1c03685
日期:2021.12.3
Hydrogenisotopeexchange reactions of phenols and benzyl alcohols have been achieved by a mesoionic carbene-iridium catalyst with high ortho selectivity and high functional group tolerance. Control experiments indicated that acetate is crucial to realize the ortho selectivity, whereas density functional theory calculations supported an outer-sphere direction with hydrogen bonding between acetate and
deuterium rush owing to the remarkable properties of this element as bioisoster of hydrogen atom. Aromatichydrogenisotopeexchange (HIE) is one of the most studied strategies nowadays as it promises to access deuterium-modified drugs directly from their non-labeled parents. While most of the recent studies focus on metal-catalyzed C-H activation strategy, the use of superacidic conditions has been largely