[EN] PHENYLPYRIDAZINE DERIVATIVES AS LIGANDS FOR GABA RECEPTORS<br/>[FR] DERIVES DE PHENYLPYRIDAZINE UTILISES EN TANT QUE LIGANDS POUR DES RECEPTEURS GABA
申请人:MERCK SHARP & DOHME
公开号:WO2004014865A1
公开(公告)日:2004-02-19
A class of 4-phenylpyridazine derivatives of Formula (I), being selective ligands for GABAA receptors, in particular having high affinity for the α2 and/or α3 and or α5 subunit thereof, are accordingly of benefit in the treatment and/or prevention of adverse conditions of the central nervous system, including anxiety, convulsions and cognitive disorders.
Formula (I)的4-苯基吡啶并衍生物是GABAA受体的选择性配体,特别是对其α2和/或α3和/或α5亚基具有高亲和力,因此在治疗和/或预防中枢神经系统的不良状况,包括焦虑、抽搐和认知障碍方面具有益处。
Ligand-Dependent Site-Selective Suzuki Cross-Coupling of 3,5-Dichloropyridazines
General methods for the highly site-selective Suzuki monocoupling of 3,5-dichloropyridazines have been discovered. By changing the ligand employed, the preferred coupling site can be switched from the 3-position to the 5-position, typically considered the less reactive C–X bond. These conditions are applicable to the coupling of a wide variety of aryl-, heteroaryl-, and vinylboronic acids with high
A novel and efficient strategy for the synthesis of 1,6-dihydropyridazines via copper-promoted 6-endo-trig cyclization of readily available β,γ-unsaturated hydrazones have been developed. A series of 1,6-dihydropyridazines have been synthesized by this method with good yields, high functional group tolerance, and remarkable regioselectivity under mild conditions. Importantly, the 1,6-dihydropyridazines
Novel aryl silicon and aryl germanium host materials are described. These compounds improve OLED device performance when used as hosts in the emissive layer of the OLED.
Here we report the first example of the dimerisation of azirines to 2H-imidazoles or 3,5-disubstituted pyridazines from a reaction promoted by FeCl2. An azirine complex with a radical structure is proposed as an intermediate. Cyclopropyl ketones and pyrrolines are isolated when the reaction is carried out in the presence of styrenes.