962-57-2Relevant academic research and scientific papers
Gold-Catalyzed Cadiot–Chodkiewicz-type Cross-Coupling of Terminal Alkynes with Alkynyl Hypervalent Iodine Reagents: Highly Selective Synthesis of Unsymmetrical 1,3-Diynes
Li, Xiangdong,Xie, Xin,Sun, Ning,Liu, Yuanhong
supporting information, p. 6994 - 6998 (2017/06/08)
A new and efficient method for the synthesis of unsymmetrical 1,3-butadiynes by gold-catalyzed C(sp)–C(sp) cross-coupling of terminal alkynes with alkynyl hypervalent iodine(III) reagents has been developed. The reaction features high selectivity and efficiency, mild reaction conditions, wide substrate scope, and functional-group compatibility, and is a highly attractive complement to existing methods. Mechanistic studies reveal that formation of a phenanthrolinyl-ligated gold(I) complex is crucial for the efficiency and selectivity of the target transformation.
Facile Synthesis of Surface-Clean Monodispersed CuOx Nanoparticles and Their Catalytic Properties for Oxidative Coupling of Alkynes
Liu, Lichen,Matsushita, Toshiyuki,Concepción, Patricia,Leyva-Pérez, Antonio,Corma, Avelino
, p. 2211 - 2221 (2016/04/26)
We show a facile method to prepare surface-clean monodispersed small and stable CuOx nanoparticles with controllable average sizes from below 1 nm up to ～5 nm without using bulk capping agent. Structural and surface characterizations show that the chemica
Cross-coupling reactions of gold(I) alkynyl and polyyndiyl complexes
Man, Wing Y.,Bock, S?ren,Zaitseva, Natasha N.,Bruce, Michael I.,Low, Paul J.
experimental part, p. 2172 - 2176 (2011/06/22)
Gold(I) alkynyl complexes are shown to efficiently couple with aryl iodides under mild conditions in the presence of both Pd(II) and Cu(I) co-catalysts. The reaction is not gold catalysed, but rather the Au(I) centre serves to transfer the alkynyl moiety to Cu(I), which then enters the conventional Sonogashira cycles. Using this method, a small range of 1,4-disubstituted diynes, including examples of differentially substituted compounds ArCCCCAr′, have been prepared directly from [(Ph3P) AuCCCCAu(PPh3)] and aryl iodides ArI.
Synthesis, structure, electronic properties and thermal behavior of butadiynyl substituted phenylCr(CO)3-complexes
Müller, Thomas J.J.,Blümel, Janet
, p. 354 - 367 (2007/10/03)
Butadiynyl-substituted η6-benzeneCr(CO)3 complexes 3 are very efficiently prepared by a copper catalyzed coupling of the phenylacetylene complex 1 and bromo alkynes 2. The transmission of electronic effects through the butadiynyl bridge operates by resonance mechanisms as established by correlations between Hammett's σp, σR and σ P+ parameters. Most interestingly, however, is an unusual thermal behavior that leads to intractable paramagnetic polymers of unknown structure. According to thermal analyses (thermal gravimetrical analysis, differential scanning calorimetry) the complexes 3 react in a thermal solid-state reaction under CO extrusion to give amorphous cross-linked polymers.
