1208342-15-7Relevant academic research and scientific papers
Catalytic Dimerization of Alkynes via C-H Bond Cleavage by a Platinum-Silylene Complex
Innocent, Jean,Kato, Tsuyoshi,Ohta, Masaya,Tobisu, Mamoru,Yoshida, Tomoki
supporting information, p. 1678 - 1682 (2020/06/08)
The cyclodimerization of diphenylacetylene derivatives catalyzed by a platinum-silylene complex is reported. The reaction proceeds via the cleavage of a carbon-hydrogen bond at the position ortho to an alkynyl group, and no additives are needed. Platinum complexes bearing other common ligands, such as phosphines and NHCs, failed to promote this reaction, highlighting the utility of the silylene ligand in this reaction.
Rhodium/phosphine/amine-HBr catalyst system for highly selective cross-cyclodimerization of aryl- and alkylalkynes: Efficient access to multisubstituted naphthalene derivatives
Sakabe, Koichi,Tsurugi, Hayato,Hirano, Koji,Satoh, Tetsuya,Miura, Masahiro
supporting information; experimental part, p. 445 - 449 (2010/05/18)
The rhodium/phosphine/amine.HBr catalyst system directed toward the highly chemoselective synthesis of multisubstituted naphthalene derivatives from two different internal alkynes was investigated. Under N2 atmosphere, [(RhC1(cod)}2], PPh3, Py.HBr, 1a, 2a, o-xylene and 1- methylnaphthalene were placed in a 20 mL two-necked reaction flask equipped with a reflux condenser. After the mixture was heated at 160°C for 6 h, the consumption of 1a was checked by GC analysis. The resulting mixture was allowed to cool to room temperature and then concentrated under reduced pressure. The residue obtained was purified by column chromatography on silica gel with hexane as an eluent to give 3-phenyl-1,2-dipropylnaphthalene in 84% yield. The catalyst enabled the use of alkenes as the coupling components, providing the dihydronaphthalenes.
