Potential Solution Processible Phosphorescent Iridium Complexes toward Applications in Doped Light-Emitting Diodes: Rapid Syntheses and Optical and Morphological Characterizations
摘要:
A series of carbazol-9-yl end-capped red-emitting heteroleptic iridium complexes was readily synthesized using post Suzuki coupling. The appealing solubility, photoluminescent characteristics, and morphological stability enabled the current heteroleptic iridium complexes to be highly desirable phosphorescent dopant emitters in doped light-emitting diodes for the purpose of resisting molecular aggregations in the doped emitting layers.
Palladium nanoparticle catalysis: borylation of aryl and benzyl halides and one-pot biaryl synthesis via sequential borylation-Suzuki–Miyaura coupling
作者:Ansuman Bej、Dipankar Srimani、Amitabha Sarkar
DOI:10.1039/c2gc16111g
日期:——
catalyze the reaction of bis(pinacolato)diboron with various aryl/benzyl halides to afford aryl/benzyl boronates in high yield. Arylboronates thus prepared, have been directly used in the Suzuki–Miyaura coupling reaction with different aryl halides and benzyl halides in a convenient one-pot, two-step solvent free green synthesis of unsymmetrical biaryls and diarylmethanes.
this reaction amenable for industry. A plethora of synthetically very useful halogenated anilines, which often cannot be prepared via other transition-metal-catalyzed aminations, are readily produced using this method. Particularly, the orthogonal reactivity between pinacol arylborates and aryl iodides is demonstrated. Preliminary deuterium-labeling studies reveal a redox-neutral ipso-protonation mechanism
据报道,钯( II )/降冰片烯协同催化可实现频哪醇芳基硼酸盐或杂芳基硼酸盐的氧化还原中性邻位-C -H胺化,用于合成结构多样的苯胺。该方法具有可扩展性、稳健性(耐空气和湿气)、不含膦配体,并且与多种功能兼容。这些实用的特征使得该反应适合工业界。使用这种方法可以很容易地生产大量合成上非常有用的卤代苯胺,这些卤代苯胺通常无法通过其他过渡金属催化的胺化来制备。特别是,证明了频哪醇芳基硼酸盐和芳基碘化物之间的正交反应性。初步的氘标记研究揭示了该过程的氧化还原中性原质子化机制,这必将为该领域的未来发展带来启发。总体而言,该方法的范围极其广泛(47 个示例)和可靠性,加上频哪醇芳基硼酸酯的广泛可用性,使该化学成为现有苯胺合成方法的宝贵补充。
In Situ Generation of Ruthenium Carbonyl Phosphine Complexes as a Versatile Method for the Development of Enantioselective C−O Bond Arylation
作者:Hikaru Kondo、Takuya Kochi、Fumitoshi Kakiuchi
DOI:10.1002/chem.201905157
日期:2020.2.6
various ruthenium carbonyl phosphine catalysts for arylation via cleavage of inert aromatic carbon-oxygen bonds. The use of catalyst systems consisting of [RuCl2 (CO)(p-cymene)], CsF, styrene, and phosphines enabled facile screening of phosphine ligands. Asymmetric C-O arylation was also achieved for atropo-enantioselective biaryl synthesis using a chiral monodentate phosphine ligand.
The present invention relates to compounds of formula
1
wherein A is an unsubstituted or substituted cyclic group; and
R is hydrogen or lower alkyl;
or a pharmaceutically acceptable acid addition salt thereof.
These compounds are NMDA NR-2B receptor subtype specific blockers and are useful in the treatment of neurodegeneration, depression and pain.