New Ligands for Copper-Catalyzed CN Coupling Reactions at Gentle Temperature
作者:Jinyue Su、Yatao Qiu、Sheng Jiang、Dayong Zhang
DOI:10.1002/cjoc.201400147
日期:2014.8
Pyridin‐2‐ol‐N‐oxide was designed as an efficient ligand for the couplingreaction of aryl iodides, aryl bromides and aryl chlorides, respectively, with primary amines, cyclic secondary amines or N‐containing heterocycles at room or moderate temperature. The catalytic system showed great functional groups tolerance and excellent selective reactivity.
Nano Pd–Fe<sub>3</sub>O<sub>4</sub>@Alg beads: as an efficient and magnetically separable catalyst for Suzuki, Heck and Buchwald–Hartwig coupling reactions
作者:Radheshyam S. Shelkar、Sitaram H. Gund、Jayashree M. Nagarkar
DOI:10.1039/c4ra08726g
日期:——
efficient and magnetically separable nano Pd–Fe3O4@Alg beads as catalysts for Suzuki, Heck and Buchwald–Hartwig coupling reactions. This catalyst was characterized by SEM, TEM, HRTEM, XRD, EDAX, FT-IR, VSM, DSC-TGA, BET, and UV-Visible spectroscopy. This heterogeneous catalyst showed high catalytic activity and stability for C–C and C–N bond forming coupling reactions with excellent product yield under
催化过程是许多化学工业的基础。在对各种非均相催化体系的比较研究中,我们报告了高效且可磁分离的纳米Pd–Fe 3 O 4 @Alg珠粒作为Suzuki,Heck和Buchwald–Hartwig偶联反应的催化剂。通过SEM,TEM,HRTEM,XRD,EDAX,FT-IR,VSM,DSC-TGA,BET和UV-可见光谱对催化剂进行表征。这种非均相催化剂在无配体条件下对C–C和C–N键形成偶联反应具有很高的催化活性和稳定性,并具有优异的产物收率。纳米Pd–Fe 3 O 4的珠可以通过外部磁体将@Alg从反应混合物中分离出来,并重复使用几个连续的循环,而催化活性没有明显的损失。在水性介质中的Suzuki和Heck偶联反应是较绿色的路线,这是该方案的另一个优点。
作者:Bandna、Nitul Ranjan Guha、Arun K. Shil、Dharminder Sharma、Pralay Das
DOI:10.1016/j.tetlet.2012.07.096
日期:2012.9
Ligand-free solid-supported nano and microparticles of Pd(0) (SS-Pd) were used as a heterogeneous catalyst in carbon-heteroatom bond formation reactions. Nitro substituted aryl halides reacted with oxygen, sulfur, and nitrogen nucleophiles to afford the corresponding products in good yields. A one-pot sequential cross coupling and nitro-reduction was also performed using the same SS-Pd catalyst to
A series of novel 3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acidamides were synthesized and their activities were tested against seven phytopathogenic fungi by an in vitro mycelia growth inhibition assay. Most of them displayed moderate to excellent activities. Among them N-(2-(5-bromo-1H-indazol-1-yl)phenyl)-3-(difluoro-methyl)-1-methyl-1H-pyrazole-4-carboxamide (9m) exhibited higher antifungal
[EN] CARBAZOLE AND CARBOLINE COMPOUNDS FOR USE IN THE DIAGNOSIS, TREATMENT, ALLEVIATION OR PREVENTION OF DISORDERS ASSOCIATED WITH AMYLOID OR AMYOLID-LIKE PROTEINS<br/>[FR] COMPOSÉS DE CARBAZOLE ET DE CARBOLINE DESTINÉS À ÊTRE UTILISÉS DANS LE DIAGNOSTIC, LE TRAITEMENT, L'ATTÉNUATION OU LA PRÉVENTION DE TROUBLES ASSOCIÉS AUX PROTÉINES AMYLOÏDES ET DE TYPE AMYLOÏDE
申请人:AC IMMUNE SA
公开号:WO2015110263A1
公开(公告)日:2015-07-30
The present invention relates to novel compounds that can be employed in the diagnosis, treatment, alleviation or prevention of a group of disorders and abnormalities associated with amyloid proteins and amyloid-like proteins, such as Alzheimer's disease. Precursors for the preparation of the compounds according to the present invention are also provided.