1279719-71-9Relevant academic research and scientific papers
Ortho-(Dimesitylboryl)phenylphosphines: Positive boryl effect in the palladium-catalyzed suzuki-miyaura coupling of 2-chloropyridines
Malacea, Raluca,Chahdoura, Faouzi,Devillard, Marc,Saffon, Nathalie,Gomez, Montserrat,Bourissou, Didier
, p. 2274 - 2284 (2013)
Catalytic systems combining ortho-(dimesitylboryl) phenylphosphines and palladium precursors have been evaluated in the Suzuki-Miyaura couplings of chloro-N-heterocycles, in particular 2-chloro pyridines, with arylboronic acids. The Lewis basic character of the substrates does not interfere with the Lewis acidic site of the ligands, even for a substrate featuring free NH2 groups. The influence of several reaction parameters has been studied and the ortho-dimesitylboryl moiety was actually found to substantially enhance the catalytic performance. The role of this group has been examined using preformed phosphine-borane/Pd complexes and the formation of an original phosphine/h4-boratabutadiene complex has been identified as a possible deactivation pathway. Regioselective coupling of 2,6-dichloro-3-nitropyridine with phosphine-borane/Pd catalysts has also been explored, and sequential double cross-couplings were found to give a direct and efficient access to unsymmetrical 2,6-diarylpyridines.
Organic electroluminescence materials comprising substituted carbazoles and organic electroluminescence devices having the same
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Page/Page column 39-41, (2016/05/19)
The organic EL material is represented by Formula (1): where X1 to X4 are each independently a nitrogen (N) atom or a carbon atom that is monovalently bonded to R1(C—R1), R1 is a hydrogen atom, a halo
