A nickel‐catalyzed cross‐coupling of sodium sulfinates with aryl halides is reported. The reaction provides diaryl sulfones in good yields and displays a broad tolerance towards functional groups.
COMPOSITION AND LIGHT-EMITTING ELEMENT COMPRISING THE COMPOSITION
申请人:Akino Nobuhiko
公开号:US20100038592A1
公开(公告)日:2010-02-18
Disclosed is a composition comprising a compound having a pyrazine ring structure and a phosphorescent compound, wherein the compound having a pyrazine ring structure has a pyrazine ring structure represented by the general formula (1), (2) or (3):
wherein R and R
1
independently represent a hydrogen atom or a univalent group and multiple R's and multiple R
1
's may be the same as or different from one another. Also disclosed is a polymer having a residue derived from the phosphorescent compound and the pyrazine ring structure.
provide efficient synthetic access to heteroaryl sulfones in two-steps using a simple palladium–1,1′-bis[(diphenyl)phosphanyl]ferrocene catalyst to form in high yields variously functionalized heteroaromatic thioethers. Pyridinyl-containing substrates can be subsequently selectively oxidized into sulfones and NH-sulfoximines by using very mild oxidation conditions with a high functional group tolerance
The metalation of thioethers, methyl and phenyl sulfoxides and sulfones of pyrazine and pyridazine has been performed. Methyl sulfoxides and sulfones were first metalated on the methyl group. The ortho directing effect of thioethers, sulfoxides and sulfones have been compared with the methoxy group. The sulfoxides were shown to be very good ortho directing groups.