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Showing 1 to 2 of 2 for “"Alkynyl halides"”.
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Investigating Rings: From Iridium-Catalyzed [4+2] Cycloadditions of Alkynyl Halides to Ring Openings of Cyclopropanated Oxabenzonorbornadiene
… intramolecular [4+2] cycloadditions of alkynyl halides were investigated, and the catalyst conditions were optimized for ligand, solvent, and temperature. Several substrates successfully underwent cycloaddition under the optimized conditions, with yields ranging from 75- 94%. The halide …
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Chiral phosphine-catalyzed asymmetric transformations of allenoates and alkynoates and photoinduced, copper-catalyzed C-N couplings with aromatic nitrogen ceterocycles
… imidazole, and carbazole) and aryl, alkenyl, and alkynyl halides. These reactions utilize an inexpensive catalyst (Cul, without an additional ligand) and proceed at unusually low temperature for Ullmann coupling processes with these heterocycles (room temperature). Additional studies probe the …