Carbon Atom Insertion into Pyrroles and Indoles Promoted by Chlorodiazirines
作者:Balu D. Dherange、Patrick Q. Kelly、Jordan P. Liles、Matthew S. Sigman、Mark D. Levin
DOI:10.1021/jacs.1c06287
日期:2021.8.4
calculations supporting a selectivity-determining cyclopropanation step. Computations surprisingly indicate that the stereochemistry of cyclopropanation is of little consequence to the subsequent electrocyclicringopening that forges the pyridine core, due to a compensatory homoaromatic stabilization that counterbalances orbital-controlled torquoselectivity effects. The utility of this skeletal transform is
IRIDIUM COMPLEX AND ORGANIC ELECTROLUMINESCENCE DEVICE USING THE SAME
申请人:YEN FENG-WEN
公开号:US20190296251A1
公开(公告)日:2019-09-26
The present invention discloses an iridium complex of formula (1) below and an organic electroluminescence device employing the iridium complex as the phosphorescent dopant material. The organic EL device can display good performance, such as reduced driving voltage, increased current efficiency, and longer half-life time.
An organic light emitting device (OLED) that includes an anode, a cathode, and an organic layer disposed between the anode and the cathode. The organic layer includes a metal compound that comprises a ligand L
A
of Formula I, wherein the dashed lines represent coordination to a metal M.
The metal M is selected from the groups consisting of Os, Ru, Ir, Rh, Pt, Pd, and Cu, and the metal is further coordinated to one or more ligand(s) L
B
, wherein the ligand(s) L
B
can be the same or different if more than one ligand L
B
is present. Optionally one or two of the ligand(s) L
B
can independently link to the ligand L
A
through one of R
1
to R
5
. The invention is also directed to a consumer product that includes an OLED, and the OLED includes an organic layer that includes a metal compound that comprises a ligand L
A
of Formula I.
Facile Synthesis of Cyclometalated Ruthenium Complexes with Substituted Phenylpyridines
作者:Isabelle Sasaki、Laure Vendier、Alix Sournia‐Saquet、Pascal G. Lacroix
DOI:10.1002/ejic.200600359
日期:2006.8
We have developed a new strategy that uses the Krohnke synthesis for the preparation of various substituted phenylpyridines in excellent yields (up to 88 %). Starting with the appropriate commercially available acetophenone, a variety of phenylpyridines substituted by either electron-donating (i.e. methyl, methoxy) or -withdrawing groups (i.e. bromide, nitro) on the phenyl ring are obtained in a two-step