Reactions between Pentadienyltins and 1,2-Naphthoquinones, Regiocontrolled Introduction of Pentadienyl Group
作者:Yutaka Nishigaichi、Akio Takuwa
DOI:10.1246/cl.1990.1575
日期:1990.9
efficiently pentadienylated at their 4-position with usa of pentadienyltin (PDT) reagents. Regiochemistry of the introduced pentadienyl moiety, α, γ, or e position of the PDT, was controlled by both the reaction conditions and the reactants.
Construction of C‐N Atropisomers by Aminocatalytic Enantioselective Addition of Indole‐2‐carboxaldehydes to
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‐Quinone Derivatives
作者:Vasco Corti、Mathias Kirk Thøgersen、Valdemar Juel Enemærke、Nomaan M. Rezayee、Casper L. Barløse、Karl Anker Jørgensen
DOI:10.1002/chem.202202395
日期:2022.10.26
You (don't) spinmeright ‘round, baby, right ‘round. A new organocatalytic atroposelective method for the construction of C−N atropisomers is presented. The newly developed F-substituted aminocatalyst, with an increased outer-sphere steric control, enables the atroposelective formation of the desired product, which feature interesting biological motifs.
你(不要)让我转圈,宝贝,转圈。提出了一种用于构建C-N阻转异构体的有机催化阻转异构体的新方法。新开发的 F 取代氨基催化剂具有增强的外球空间位阻控制,能够选择性地形成具有有趣生物基序的所需产物。
Moehlau; Kriebel, Chemische Berichte, 1895, vol. 28, p. 3092
作者:Moehlau、Kriebel
DOI:——
日期:——
Multiple Oxo-Vanadium Schiff Base Containing Cyclotriphosphazene as a Robust Heterogeneous Catalyst for Regioselective Oxidation of Naphthols and Phenols to Quinones
作者:Praveen K. Khatri、Suman L. Jain
DOI:10.1007/s10562-012-0852-y
日期:2012.8
Grafting of multiple oxo-vanadium Schiff base moieties to cyclotriphosphazene provided an efficient and recyclable heterogeneous catalyst for the regioselective oxidation of naphthols and phenols to quinones by using t-butylhydroperoxide as oxidant. One of the main advantages of the developed catalyst was the presence of multiple oxo-vanadium moieties in close proximity which made the developed catalyst more active as compared to its homogeneous oxo-vanadium Schiff base. After the reaction, the catalyst was easily recovered from the reaction mixture by simple filtration and reused for five runs without loss in activity.
Gradenwitz, Chemische Berichte, 1894, vol. 27, p. 2623