We describe herein a palladium-catalyzed Heck-type reaction of O-acetyl ketoximes and allylicalcohols to pyridines. This protocol allows robust synthesis of pyridines and azafluorenones in good to excellent yields with...
Modular Pyridine Synthesis from Oximes and Enals through Synergistic Copper/Iminium Catalysis
作者:Ye Wei、Naohiko Yoshikai
DOI:10.1021/ja312346s
日期:2013.3.13
ketoximes and α,β-unsaturated aldehydes that is synergistically catalyzed by a copper(I) salt and a secondary ammonium salt (or amine). This redox-neutral reaction allows modular synthesis of a variety of substituted pyridines under mild conditions with tolerance of a broad range of functional groups. The reaction is driven by a merger of iminium catalysis and redox activity of the copper catalyst, which
我们在此描述了由铜(I)盐和仲铵盐(或胺)协同催化的 O-乙酰基酮肟和 α,β-不饱和醛的 [3+3] 型缩合反应。这种氧化还原中性反应允许在温和条件下模块化合成各种取代的吡啶,并具有广泛的官能团耐受性。该反应由亚胺催化和铜催化剂的氧化还原活性的结合驱动,最初会还原肟 NO 键以生成亲核铜 (II) 烯酰胺,然后将二氢吡啶中间体氧化为吡啶产物。
Electroluminescent efficiency
申请人:Kwong Raymond
公开号:US20060008673A1
公开(公告)日:2006-01-12
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.
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 may include 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. Additionally or alternatively, the emissive layer may include a metal-ligand complex in which the ligand is an aryl or alkyl substituted phenylpyridine ligand.
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 may include 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. Additionally or alternatively, the emissive layer may include a metal-ligand complex in which the ligand is an aryl or alkyl substituted phenylpyridine ligand.