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
heterogeneous ruthenium catalyst for meta‐selective C−H functionalizations, which enabled remote halogenations with excellent site selectivity and ample scope. The versatile heterogeneous Ru@SiO2 catalyst was broadly applicable and could be easily recovered and reused, which set the stage for the direct fluorescent labeling of purines. In contrast to palladium, rhodium, iridium, or cobalt complexes, solely
An organic light emitting device is provided. The device has an anode, a cathode, and an emissive layer disposed between the anode and the cathode. The emissive layer further includes a molecule of Formula I wherein an alkyl substituent at position R′
5
results in high efficiency and operational stability in the organic light emitting device.