A highly efficient iodine-catalyzed regioselective oxidative cross-coupling of an indole C-H bond and azole N-H bond is described. This metal-free reaction can be easily carried out at room temperature under mild and environmentally friendly conditions and provides a series of N-linked 2-(azol-1-yl)indole derivatives in moderate to excellence yields.
Comparative bindings of several renowned monomers were investigated experimentally using B(C6F5)3 as a Lewis acid model for the coordination step in ring-opening polymerization. A complete series of the X-ray crystal...
A new series of catalysts for ethylene and ethylene/1-hexene
(co)polymerizations
bearing constrained hydroxyindanone-imine ligands was developed for
titanium(IV) and zirconium(IV) metals with variations of steric and
electronic contributions on the ligands. X-ray crystal structures
revealed significantly higher open space for the constrained titanium
and zirconium complexes, compared to the conventional FI counterparts.
Upon activation with MAO, significantly higher ethylene polymerization
activities (up to 379.4 kg-PE/mmol-M h for Zr) and notably almost
doubled 1-hexene content in the ethylene/1-hexene copolymerizations
were observed as a result of the constrained five-membered ring backbone.
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