Additive‐Free Isomerization of Allylic Alcohols to Ketones with a Cobalt PNP Pincer Catalyst
作者:Brian Spiegelberg、Andrea Dell'Acqua、Tian Xia、Anke Spannenberg、Sergey Tin、Sandra Hinze、Johannes G. de Vries
DOI:10.1002/chem.201901148
日期:2019.6.12
Catalyticisomerization of allylic alcohols in ethanol as a green solvent was achieved by using air and moisture stable cobalt (II) complexes in the absence of any additives. Under mild conditions, the cobalt PNP pincer complex substituted with phenyl groups on the phosphorus atoms appeared to be the most active. High rates were obtained at 120 °C, even though the addition of one equivalent of base
Manganese-Catalyzed Anti-Markovnikov Hydroamination of Allyl Alcohols via Hydrogen-Borrowing Catalysis
作者:Kuhali Das、Koushik Sarkar、Biplab Maji
DOI:10.1021/acscatal.1c01199
日期:2021.6.18
In this article, a selective formal anti-Markovnikov hydroamination of allyl alcohols is presented. It enables the versatile synthesis of valuable γ-amino alcohol buildingblocks. A phosphine-free Earth’s abundant manganese(I) complex catalyzed the reaction under hydrogen-borrowing conditions. A vast range of aliphatic, aromatic amines, drug molecules, and naturalproduct derivatives underwent successful
Ruthenium-Catalyzed Redox Isomerizations inside Living Cells
作者:Cristian Vidal、María Tomás-Gamasa、Alejandro Gutiérrez-González、José L. Mascareñas
DOI:10.1021/jacs.9b00837
日期:2019.4.3
Tailored ruthenium(IV) complexes can catalyze the isomerization of allylic alcohols into saturated carbonyl derivatives under physiologically relevant conditions, and even inside living mammalian cells. The reaction, which involves ruthenium-hydride intermediates, is bioorthogonal and biocompatible, and can be used for the “in cellulo” generation of fluorescent and bioactive probes. Overall, our research
Rhodium-Catalysed Coupling of Allylic, Homoallylic, and Bishomoallylic Alcohols with Aldehydes and<i>N</i>-Tosylimines: Insights into the Mechanism
作者:Nanna Ahlsten、Belén Martín-Matute
DOI:10.1002/adsc.200900448
日期:2009.11
alkenols followed by reaction with aldehydes or N-tosylimines catalysed by rhodiumcomplexes has been studied. The catalytically active rhodiumcomplex is formed in situ from commercially available (cyclooctadiene)rhodium(I) chloride dimer [Rh(COD)Cl]2. The tandem process affords aldol and Mannich-type products in excellent yields. The key to the success of the coupling reaction is the activation of
已经研究了烯醇的异构化,然后与铑络合物催化的醛或N-甲苯胺反应。催化活性的铑配合物是由可商购的(环辛二烯)氯化铑(I)二聚体[Rh(COD)Cl] 2原位形成的。串联过程以优异的产率提供了羟醛和曼尼希型产品。于偶联反应的成功的关键是,催化剂的活化通过与postassium叔丁醇(叔丁醇钾),这促进了催化循环通过醇盐,而不是铑的氢化物。该机制使不需要的副产物的形成最小化。该机制已被1研究1 H NMR光谱和氘标记实验。
Pentamethylcyclopentadienyl ruthenium: an efficient catalyst for the redox isomerization of functionalized allylic alcohols into carbonyl compounds
The catalytic activity of the ruthenium(II) complex [RuCp∗(CH3CN)3][PF6] 1 in the transposition of allylicalcohols into carbonyl compounds, in acetonitrile, is reported. This catalyst has proven to be able to catalyze the transformation of poorly reactive and/or functionalized substrates under smooth conditions.