94804-13-4Relevant academic research and scientific papers
From Cluster to Polymer: Ligand Cone Angle Controlled Syntheses and Structures of Copper(I) Alkynyl Complexes
Chang, Xiao-Yong,Low, Kam-Hung,Wang, Juan-Yu,Huang, Jie-Sheng,Che, Chi-Ming
, p. 10312 - 10316 (2016)
Copper(I) alkynyl complexes have attracted tremendous attention in structural studies, as luminescent materials, and in catalysis, and homoleptic complexes have been reported to form polymers or large clusters. Herein, six unprecedented structures of CuIalkynyl complexes and a procedure to measure the cone angles of alkynyl ligands based on the crystal structures of these complexes are reported. An increase of the alkynyl cone angle in the complexes leads to a modulation of the structures from polymeric [((PhC≡CC≡C)Cu)2(NH3)]∞, to a large cluster [(TripC≡CC≡C)Cu]20(MeCN)4, to a relatively small cluster [(TripC≡C)Cu]8(Trip=2,4,6-iPr3-C6H2). The complexes exhibit yellow-to-red phosphorescence at ambient temperature in the solid state and the luminescence behavior of the Cu20cluster is sensitive to acetonitrile.
Click-binol-phosphoric acid catalysts in intramolecular enantioselective oxidative C[sbnd]H-bond functionalization
Stockerl, Sebastian,Gutiérrez, Daniel,García Manche?o, Olga
, p. 572 - 585 (2016/12/16)
Counteranion-catalysis represents an appealing but challenging approach for the development of enantioselective oxidative C[sbnd]H bond functionalization reactions. In this work, a new family of 3,3′-triazolyl BINOL-derived phosphoric acids was synthesized and employed in the intramolecular asymmetric C[sbnd]H bond functionalization of N-aryl substituted tetrahydroisoquinolines. As previously reported with related structures, the presence of the triazole groups on the catalysts was key to attain enantioselectivity. Our study also shows the importance of choosing the appropriate regioisomeric triazole groups at the BINOL backbone to achieve a more efficient chirality transfer. Moderate enantiomeric ratios were obtained with the N-benzamide substrates, whereas the change of the nature of the nucleophile fragment was translated to a dramatic loss of the enantioselectivity. Therefore, it can be foreseen that there is a need for designing further superior catalyst structures to develop future counter-anion organocatalyzed asymmetric C[sbnd]H bond functionalization reactions.
CRYSTALLINE 1H-1,2,3-TRIAZOL-5-YLIDENES
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Page/Page column 40-41, (2011/11/30)
The present invention provides novel and stable crystalline 1H-1,2,3 triazolium carbenes and metal complexes of 1H-1,2,3 triazolium carbenes. The present invention also provides methods of making 1H-1,2,3 triazolium carbenes and metal complexes of 1H-1,2,
