62378-39-6Relevant academic research and scientific papers
Effective palladium-catalyzed synthesis of triarylethene-based molecules in aqueous solution
Zhu, Yan,Sun, Peng,Yang, Hailong,Lu, Linhua,Yan, Hong,Creus, Marc,Mao, Jincheng
experimental part, p. 4831 - 4837 (2012/09/22)
Highly effective and selective Pd-catalyzed coupling reactions of 1,1-dibromo-1-alkenes with various arylboronic acids have been performed in aqueous solution under mild conditions. The method is simple, economic, and practical for the synthesis of triarylethene-based compounds. Copyright
Palladium-catalysed direct synthesis of benzo[b]thiophenes from thioenols
Inamoto, Kiyofumi,Arai, Yukari,Hiroya, Kou,Doi, Takayuki
supporting information; experimental part, p. 5529 - 5531 (2009/04/13)
The one-pot conversion of thioenols into benzo[b]thiophenes was achieved by using a simple palladium catalyst such as PdCl2 or PdCl 2(cod). The Royal Society of Chemistry.
Competition of mechanisms in the photochemical cleavage of the C-X bond of aryl-substituted vinyl halides
Galli, Carlo,Gentili, Patrizia,Guarnieri, Alessandra,Kobayashi, Shinjiro,Rappoport, Zvi
, p. 9292 - 9299 (2007/10/03)
The photolysis of aryl halides caused homolysis of the carbon-halogen bond and formation of aryl radicals. In contrast, photolysis of vinyl halides can induce both heterolysis of the C-X bond, thereby generating vinyl cations, and homolysis, giving vinyl radicals. Examples of this competition among pathways is reported here for three vinylic precursors, namely, 1,2,2- triphenylbromoethene (1), 1-phenyl-2,2-bis(o-methoxyphenyl)-1-bromoethene (11), and β-bromostyrene (19). Incursion of the photoinduced S(RN)1 process, through the intermediacy of the vinyl radical, is verified in the presence of reducing nucleophiles, such as the enolate ions of ketones, and in part with (EtO)2PO-. Conversely, incursion of the heterolytic path, and intermediacy of the vinyl cation, occurs in the presence of weak electron-donor anions, such as NO2-, N3-, and Cl-. The vinyl cation produced from 19, which is less stable than those derived from 1 and 11, gives phenylacetylene via an E1-type elimination. An estimate is provided for the intramolecular rate of interception of the vinyl cation derived from 11 by the ortho-methoxy groups of the β-o-anisyl substituents. Finally, evidence against a photoinduced electron transfer from RO- ions to vinyl halide 1 is presented.
