Build-up of double carbohelicenes using nitroarenes: dual role of the nitro functionality as an activating and leaving group
作者:Fulin Zhou、Fujian Zhou、Rongchuan Su、Yudong Yang、Jingsong You
DOI:10.1039/d0sc02058c
日期:——
streamlined and simplified synthetic route to double carbohelicenes starting from nitroarenes through sequential nitro-activated ortho-C–H arylation, denitrative alkenylation and intramolecular cyclodehydrogenation. In this synthetic strategy, the nitro group plays a dual role namely as a leaving group for the denitrative alkenylation and as an activating group for ortho-C–H arylation, which is distinct
Brønsted acid-catalysed conjugate addition of photochemically generated α-amino radicals to alkenylpyridines
作者:Hamish B. Hepburn、Paolo Melchiorre
DOI:10.1039/c5cc10401g
日期:——
The conjugate addition of [small alpha]-amino radicals to alkenylpyridines has been accomplished by the synergistic merger of Bronsted acid and visible light photoredox catalysis. Key to reaction development was the protonation...
Bicyclometalation of aromatic substratescontainingimineanchoringgroups is achieved with a dimethyliron complex at -70 degrees C; azadiene systems undergo a regiospecific activation of 1,4-CH/N interchanged C-H bonds which may be aromatic or vinylic.
Organic light emitting diode containing a novel Ir complex as a phosphorescent emitter
申请人:Cheng Chien-Hong
公开号:US20050227109A1
公开(公告)日:2005-10-13
A phosphorescent Ir complex having the following structures (I) or (II) is used as an emitter in an organic light emitting diode (OLED):
wherein X is an arbitrary monoanionic bidentate ligand; Z is an arbitrary moiety constituting a nitrogen-containing heterocyclic group; R
1
is a substituent on the nitrogen-containing heterocyclic group; m is 0 or a positive integer; R
2
and R
3
independently are H, halogen, C1-C6 alkyl, a halogen-substituted C1-C6 alkyl, C1-C6 alkoxy, phenyl C1-C6 alkyl, amino, aryl, heterocyclic aryl substituent.
Naphtalene derivatives and their pharmaceutical use
申请人:——
公开号:US20030073725A1
公开(公告)日:2003-04-17
Use of compounds of the formula (I) where A, E, R
1
, R
2
, p and q have the meanings given in the specification are GluR6 antagonists useful for the treatment of disorders of the central nervous system.