The direct arylation of N‐substituted o‐bromobenzanilides and benzenesulfonamides via CH bond functionalization has been developed using very low catalyst loadings. This novel cost‐effective and more sustainable method relies on a PCN‐type palladium pincer complex as a highly active palladium source, providing a general and efficientaccess to phenanthridinones, biaryl sultams and related heterocyclic
Spiro-condensed lactam compounds for organic electroluminescent devices
申请人:Merck Patent GmbH
公开号:US11121327B2
公开(公告)日:2021-09-14
The invention relates to polycondensed lactam compounds as materials for use in electronic devices, and electronic devices, in particular organic electroluminescent devices, containing said materials.
本发明涉及作为电子设备材料的聚缩内酰胺化合物,以及含有上述材料的电子设备,特别是有机电致发光设备。
Antimuscarinic 3-(2-Furanyl)quinuclidin-2-ene Derivatives: Synthesis and Structure−Activity Relationships
作者:Gary Johansson、Staffan Sundquist、Gunnar Nordvall、Björn M. Nilsson、Magnus Brisander、Lisbeth Nilvebrant、Uli Hacksell
DOI:10.1021/jm970346t
日期:1997.11.1
A series of 25 derivatives of the muscarinic antagonist 3-(2-furanyl)quinuclidin-2-ene (4) was synthesized and evaluated for muscarinic and antimuscarinic properties. Substitution at all three positions of the furan ring has been investigated. The affinities of the new compounds were determined by competition experiments in homogenates of cerebral cortex, heart, parotid gland, and urinary bladder from guinea pigs using (-)-[H-3]-3-quinuclidinyl benzilate as the radioligand, and the antimuscarinic potency was determined in a functional assay on isolated guinea pig urinary bladder using carbachol as the agonist. Several of the novel derivatives displayed high muscarinic affinities. Whereas the affinity of lead compound 4 for cortical muscarinic receptors is moderate (K-i 300 nM), it is much higher for the 6-methyl (49; K-i = 12 nM), 5-ethyl (52; K-i = 7.4 nM), 5-bromo (33; K-i = 6.4 nM), and 3-phenyl (49; K-i = 2.8 nM) substituted derivatives. The substituent-induced increases in affinity do not appear to be additive as a 5-bromo-3-phenyl (54), and a 5-methyl-3-phenyl (55) substitution pattern only slightly increases affinity (K-i = 1.55 and 2.39 nM, respectively). The conformational preferences of the 3-phenyl (49) and 5-phenyl (51) derivatives were studied by X-ray crystallography and molecular mechanics calculations. Because of the observed high affinity of 49, a series of 16 meta-and para-substituted analogues of 49 was synthesized and tested. derivative (68) exhibited more than 10-fold improvement in affinity as compared to 49. The structure-activity relationships of the new series are well described with QSAR and CoMFA models.
Synthesis of 6-Phenanthridinones and Their Heterocyclic Analogues through Palladium-Catalyzed Sequential Aryl−Aryl and <i>N</i>-Aryl Coupling
6-Phenanthridinones and their heterocyclic analogues were synthesized through a one-pot procedure based on consecutive Pd-catalyzed aryl-aryl and N-aryl coupling from iodoarenes ortho-substituted by electron-releasing substituents and amides of o-bromoarene- and heteroarenecarboxylic acids.
SPIROKONDENSIERTE LACTAMVERBINDUNGEN FÜR ORGANISCHE ELEKTROLUMINESZENZVORRICHTUNGEN