Toward Safer Processes for C−C Biaryl Bond Construction: Catalytic Direct C−H Arylation and Tin-Free Radical Coupling in the Synthesis of Pyrazolophenanthridines
pyrazolo[1,5-f]phenanthridine derivatives has been efficiently synthesized by a short, straightforward sequence. A tandem amine-exchange/heterocyclization of enaminones was successfully applied to the regioselective preparation of 1,5-diarylpyrazole intermediates with structure resemblance to relevant nonsteroidal anti-inflammatory drugs such as celecoxib or tepoxalin. The final key step, cyclization by intramolecular
HIGH-MOLECULAR COMPOUND AND LIGHT-EMITTING ELEMENT USING SAME
申请人:Sumitomo Chemical Company, Limited
公开号:US20150207077A1
公开(公告)日:2015-07-23
A high-molecular compound including a group indicated by general formula (11) as a repeating unit.
In formula (11) n1 indicates an integer of 1-3. Ar
1
indicates an arylene group, a divalent aromatic heterocyclic group, or a divalent aromatic amine residue, and these groups may have a substituent group. If there is a plurality of Ar
1
, the Ar
1
can be the same or can be different. R
11
indicates a hydrogen atom, an alkyl group, an aryl group, a monovalent aromatic heterocyclic group, or an aralkyl group, and said groups may have a substituent group. The plurality of R
11
can be the same or can be different. However, at least three of the R
11
are an alkyl group, an aryl group, a monovalent aromatic heterocyclic group, or an aralkyl group.