A Regioselective Approach to Trisubstituted Pyrazoles via Palladium-Catalyzed Oxidative Sonogashira-Carbonylation of Arylhydrazines.
Sign Up to like & getrecommendations! Published in 2017 at "Organic letters"
DOI: 10.1021/acs.orglett.7b01447
Abstract: A palladium-catalyzed oxidative carbonylation of arylhydrazines and alkynes with balloon pressure CO/O2 to afford trisubstituted pyrazoles in a one-pot manner has been developed. The formation of trisubstituted pyrazoles involves a sequential C-N bond cleavage, carbonylation,… read more here.
Keywords: trisubstituted pyrazoles; carbonylation; palladium catalyzed; carbonylation arylhydrazines ... See more keywords
Efficient access to materials-oriented aromatic alkynes via the mechanochemical Sonogashira coupling of solid aryl halides with large polycyclic conjugated systems
Sign Up to like & getrecommendations! Published in 2022 at "Chemical Science"
DOI: 10.1039/d1sc05257h
Abstract: Sonogashira coupling represents an indispensable tool for the preparation of organic materials that contain C(sp)–C(sp2) bonds. Improving the efficiency and generality of this methodology has long been an important research subject in materials science. Here,… read more here.
Keywords: materials oriented; sonogashira coupling; mechanochemical sonogashira; coupling solid ... See more keywords
Nickel–palladium bimetallic nanoparticles supported on multi-walled carbon nanotubes; versatile catalyst for Sonogashira cross-coupling reactions
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DOI: 10.1039/d3ra00027c
Abstract: We have developed an efficient method to generate highly active nickel–palladium bimetallic nanoparticles supported on multi-walled carbon nanotubes (Ni–Pd/MWCNTs) by dry mixing of the nickel and palladium salts utilizing the mechanical energy of a ball-mill.… read more here.
Keywords: cross coupling; catalyst; sonogashira; sonogashira cross ... See more keywords