13136-18-0Relevant articles and documents
The enders Triazole : A well known molecule, but still a new ligand!!
Strassner, Thomas,Unger, Yvonne,Meyer, Dirk,Molt, Oliver,Münster, Ingo,Wagenblast, Gerhard
, p. 39 - 41 (2013)
1,3,4-Triphenyl-1,2,4-triazolium salts have previously been used and described in the literature as precursors for carbenes, which have been reported as organocatalysts and as neutral monodentating N-heterocyclic carbene (NHC) ligands. We now report the synthesis of 1,3,4-tri-phenyl-4,5-dihydro-1H-1,2,4- triazole-5-ylidene-platinum(II)-acetylacetonate where the triazole binds to the metal in a new coordination mode (C^C*) as an anionic bidentate ligand, where the NHC carbene interacts with the platinum center and one of the phenyl rings is cyclometalated. The complex shows phosphorescent emission in the blue region of the visible spectrum at 441 and 465 nm with a quantum yield of 42%. DFT calculations (BP86/6-31G* as well as B3LYP/6-31G*) were found to be well suited to determine the structure of the complex.
Controlled polymerization of styrene in the presence of Blatter’s radicals
Burdyukova, T. O.,Fedorov, A. Yu.,Grishin, I. D.,Kuznetsova, Yu. L.,Lopatin, M. A.,Malysheva, Yu. B.,Polozov, E. Yu.,Vavilova, A. S.,Zaburdaeva, E. A.
, p. 1470 - 1477 (2020/09/23)
Controlled polymerization of styrene (both self-initiated and initiated with azobisisobutyronitrile) in the presence of Blatter’s radical at 125 °C was studied. When using the radical initiator, there is no induction period. On the basis of UV spectroscopy and MALDI massspectrometry studies, it was established that the Blatter radical is completely consumed at the initial stage of the polymerization, inserting into almost all macromolecules. The prepared polystyrene exhibits the ability to reinitialization in post-polymerization and the synthesis of block copolymers.
Intercepted dehomologation of aldoses by N-heterocyclic carbene catalysis-a novel transformation in carbohydrate chemistry
Draskovits, Markus,Kalaus, Hubert,Stanetty, Christian,Mihovilovic, Marko D.
, p. 12144 - 12147 (2019/10/21)
The development of an N-heterocyclic carbene (NHC) catalysed intercepted dehomologation of aldoses is reported. The unique selectivity of NHCs for aldehydes is exploited in the complex context of reducing sugars. Examples of strong substrate governance for either intercepted dehomologation or a subsequent redox-lactonisation were identified and mechanistically understood. More importantly, it was shown that catalyst design allowed the tuning of the selectivity of the reaction with structurally unbiased starting materials towards either of the two scenarios.