An efficient nickel-catalyzed acceptorless dehydrogenative coupling of methyl-substituted heteroarenes with primary alcohols is achieved using an in situ generated complex of inexpensive NiBr2 and readilyavailable 8-aminoquinoline picolinic amide ligand. The protocol is operationally simple and scalable and furnishes a series of high-value 2-alkenylheteroarenes in good yields (up to 88%) with exclusive
Nickel(II)‐Catalyzed Selective
<i>(E)</i>
‐Olefination of Methyl Heteroarenes Using Benzyl Alcohols via Acceptorless Dehydrogenative Coupling Reaction
作者:Gunasekaran Balamurugan、Rengan Ramesh
DOI:10.1002/cctc.202101455
日期:2022.1.21
characterized with FT-IR, NMR, HRMS and single crystal X-ray method. The new complexes were tuned as effective homogeneous catalysts for synthesis of selective (E)-olefins from the reaction of methyl heteroarenes and benzyl alcohols via greener ADC methodology. The earth abundant nickel complexes performed well with 4 mol% of catalyst loading at 110 °C for 35 h, resulting in good to excellent yields (40–93 %)
作者:Veerappan Tamilthendral、Gunasekaran Balamurugan、Rengan Ramesh、Jan Grzegorz Malecki
DOI:10.1002/aoc.6561
日期:2022.3
strategy is operationally simple and scalable and tolerates various functional groups undermild reaction conditions. Notably, an aldehyde and aryl-2-quinoline-2-yl-ethanol intermediate are involved in the catalytic reaction mechanism. The utility of the present procedure is demonstrated through a facilesynthesis of the antifungal drug (E)-2-(2-(pyridin-4-yl)vinyl)quinoline.
Excited state properties of some 1-(9-anthryl)-2-naphthylethene and 1-(9-anthryl)-2-quinolylethene derivativesDedicated to Professor Frank Wilkinson on the occasion of his retirement.
作者:Eun Ju Shin、Robert Stackow、Christopher S. Foote
DOI:10.1039/b204780m
日期:2002.10.3
(n = 1 or 2, t-n-ANE) and trans-1-(9-anthryl)-2-(n-quinolyl)ethenes (n = 2–4, t-n-AQE) derivatives have been studied in methylcyclohexane and acetonitrile at room temperature. The hydrocarbon derivative t-1-ANE exhibits fluorescence and intersystem crossing quantum yields (which are independent of solvent polarity) very similar to those of trans-1-(9-anthryl)-2-phenylethene. For the monoaza analog t-4-AQE
Microwave-assisted solvent-free synthesis of 2-styrylquinolines in the presence of zinc chloride
作者:V. M. Li、T. N. Gavrishova、M. F. Budyka
DOI:10.1134/s1070428012060139
日期:2012.6
An efficient solvent-free procedure has been developed for the synthesis of (E)-2-styrylquinoline derivatives under microwave irradiation in the presence of zinc chloride. The developed procedure is advantageous due to shorter reaction time and simpler workup.