Metal-Free<i>meta</i>-Selective Alkyne Oxyarylation with Pyridine<i>N</i>-Oxides: Rapid Assembly of Metyrapone Analogues
作者:Xiangyu Chen、Stefan A. Ruider、Rolf W. Hartmann、Leticia González、Nuno Maulide
DOI:10.1002/anie.201607988
日期:2016.12.5
An efficient metal‐free oxyarylation of electron‐poor alkynes with pyridine N‐oxides has been developed. This transformation affords meta‐substituted pyridines analogous to the drug metyrapone in high regioselectivities. Density functional theory (DFT) calculations provided important insight into the mechanism. Evaluation of the inhibitory properties revealed the most active CYP11B1 inhibitor of these
A smart H-phosphonate-mediated synthetic strategy for the sulfonylation of heteroaromatic N-oxides has been developed in one pot under metal-free conditions at room temperature.
I
<sub>2</sub>
‐Mediated Iodization/ [3+2] Cycloaddition/Nucleophilic Addition Tandem Reaction: Synthesis of Polyheterocycles Bearing Furoquinoline and Maleimide
作者:Sidong Du、Chao Pi、Ting Wan、Yangjie Wu、Xiuling Cui
DOI:10.1002/adsc.201801433
日期:2019.4.16
furoquinoline and C2‐maleimide‐substituted quinoline has been developed with easily available quinoline N‐oxides and maleimides via tandem reactions mediated by I2, including iodization, [3+2] cycloaddition and nucleophilicaddition reactions. I2 acts as a halogenating agent to promote the subsequent [1,5]‐sigma rearrangement. Two C−O bonds, three C−C bonds and a quaternary carbon center were formed in “one pot”
Fungal infections could cause tremendous decreases in crop yield and quality. Natural products, including flavonoids and (iso)quinolines, have always been an important source for lead discovery in medicinal and agricultural chemistry. To promote the discovery and development of new fungicides, a series of 3-(iso)quinolinyl-4-chromenone derivatives was designed and synthesized by the active substructure
Cp*Rh(III)‐Catalyzed C8 C−H Alkylation of Quinoline
<i>N</i>
‐Oxides with Diazo Meldrum's Acid
作者:Malcolm P. Huestis、Jean‐Philippe Leclerc、Robin Larouche‐Gauthier、Samuel Aubert‐Nicol、Arun Yadav、Koilpitchai Sivamuthuraman
DOI:10.1002/ejoc.202001584
日期:2021.1.22
A C8‐selective Cp*Rh(III)‐catalyzed C−H alkylation of quinoline N‐oxides using commercially available diazo Meldrum's acid is reported. The reaction employs a widely available catalyst and enables the synthesis of a variety of 8‐quinolinylacetic acid esters on gram scale.