A Convenient Synthesis of 9,10-Bis(3-methylphenyl)anthracene on a Kilo-Lab Scale
作者:Joel M. Kauffman
DOI:10.1055/s-2001-10807
日期:——
Cross-coupling of 9,10-dihaloanthracene with arylmagnesium halides gave polymers when catalyzed by PdCl2 · dppb, but the expected 9,10-diarylanthracene was obtained using NiCl2 · dppp as the catalyst. The latter procedure was developed into a large-scale preparation of 9,10-dichloroanthracene.
An organic EL device includes an anode, a cathode and an EL element arranged between the two. The EL element includes a substance represented by the following chemical formula:
in which m, n=1-3; the substitute R is selected from a group consisting of t-butyl, phenyl, methylphenyl, naphehyl and heterocyclic compound. The EL element is highly efficient, lower-voltage operative and easy to be synthesized.
Readily available and inexpensive NiBr2 has been used for the first time to accomplish the ligand-free and activator-less catalytic Suzuki coupling of a variety of arylhalides (ca. 60 examples) with several arylboronic acids in high yields under ambient conditions with good functional group tolerance.