Chemoselective Tertiary C−H Hydroxylation for Late‐Stage Functionalization with Mn(PDP)/Chloroacetic Acid Catalysis
作者:Rachel K. Chambers、Jinpeng Zhao、Connor P. Delaney、M. Christina White
DOI:10.1002/adsc.201901472
日期:2020.1.23
oxidizing remote tertiary C(sp 3)-H bonds in the presence of a broad range of aromatic and heterocyclic moieties. Although catalyst loadings can be lowered to 0.1 mol% under a Mn(PDP)/acetic acid system for aromatic and non-basic nitrogen heterocycle substrates, the Mn(PDP)/chloroacetic acid system generally affords 10-15% higher isolated yields on these substrates and is uniquely effective for remote C(sp
芳香族和杂环官能团在药物中无处不在。在这里,我们公开了一种新的Mn(PDP)催化剂体系,它使用氯乙酸添加剂,能够在宽范围的芳族和杂环基团存在下化学选择性氧化远端C(sp 3)-H键。尽管对于芳香族和非碱性氮杂环底物,在Mn(PDP)/乙酸体系下催化剂负载量可降低至0.1 mol%,但Mn(PDP)/氯乙酸体系通常可将这些化合物的分离产率提高10-15%底物,并且对于容纳碱性氮杂环的底物中的远程C(sp 3)-H羟基化作用特别有效。