作者:Nicholas E. Intermaggio、Agustin Millet、Dali L. Davis、David W. C. MacMillan
DOI:10.1021/jacs.2c04807
日期:2022.7.13
Deoxy-functionalization of alcohols represents a class of reactions that has had a profound impact on modern medicine. In particular, deoxyfluorination is commonly employed as a means to incorporate high-value fluorine atoms into drug-like molecules. Recently, the trifluoromethyl (CF3) group has garnered attention from medicinal chemists due to its ability to markedly improve the pharmaceutical properties
Nickel Catalysis via S<sub>H</sub>2 Homolytic Substitution: The Double Decarboxylative Cross-Coupling of Aliphatic Acids
作者:Artem V. Tsymbal、Lorenzo Delarue Bizzini、David W. C. MacMillan
DOI:10.1021/jacs.2c08989
日期:2022.11.23
generation, radical sorting via selective binding to a Ni(II) center, and bimolecularhomolyticsubstitution (SH2) at a high-valent nickel–alkyl complex. This catalytic manifold enables the hitherto elusive cross-coupling of diverse aliphatic carboxylic acids to generate valuable C(sp3)–C(sp3)-products. Notably, the powerful SH2 mechanism provides general access to sterically encumbered quaternary carbon
交叉偶联平台传统上是围绕一系列闭壳步骤构建的,例如氧化加成、金属转移和还原消除。在此,我们描述了一种双光/镍催化歧管,它通过互补序列进行交叉偶联,涉及自由基生成、通过选择性结合到 Ni(II) 中心的自由基分选以及高催化下的双分子均解取代 (S H 2)。 -价镍-烷基络合物。这种催化歧管能够实现迄今为止难以捉摸的不同脂肪族羧酸的交叉偶联,生成有价值的 C(sp 3 )–C(sp 3 )-产物。值得注意的是,强大的 S H 2 机制提供了对空间阻碍的季碳中心的普遍访问,解决了片段偶联化学中长期存在的挑战。
Site‐Specific Deaminative Trifluoromethylation of Aliphatic Primary Amines**
作者:Jiang‐Hao Xue、Yin Li、Yuan Liu、Qingjiang Li、Honggen Wang
DOI:10.1002/anie.202319030
日期:2024.2.19
A direct deaminative trifluoromethylation of inactivated aliphaticprimaryamines with N-anomeric amide (Levin's reagent) and bench-stable bpyCu(CF3)3 (Grushin's reagent, bpy=2,2′-bipyridine) under blue light irradiation is reported. The protocol features mild reaction conditions, good functional group tolerance and can be applied to the direct, late-stage trifluoromethylation of natural products and