Phosphine-free cobalt pincer complex catalyzed <i>Z</i>-selective semi-hydrogenation of unbiased alkynes
作者:Vinod G. Landge、Jayaraman Pitchaimani、Siba P. Midya、Murugan Subaramanian、Vedichi Madhu、Ekambaram Balaraman
DOI:10.1039/c7cy01994g
日期:——
Herein, we report a novel, molecularly defined NNN-type cobalt pincer complexcatalyzed transfer semi-hydrogenation of unbiased alkynes to Z-selective alkenes. This unified process is highly stereo- and chemo-selective and exhibits a broad scope as well as wide functional group tolerance. Ammonia-borane (AB), a bench-stable substrate with high gravimetric hydrogen capacity, was used as a safe and practical
[EN] COBALT COMPLEXES, PROCESS FOR PREPARATION AND USE THEREOF<br/>[FR] COMPLEXES DE COBALT, LEUR PROCÉDÉ DE PRÉPARATION ET LEUR UTILISATION
申请人:COUNCIL SCIENT IND RES
公开号:WO2018225087A1
公开(公告)日:2018-12-13
The present invention discloses a cobalt compound of formula (I), a process for the preparation and use thereof. The present invention further relates to a pharmaceutical composition and a method inhibition of Tau Aggregation in a subject in need thereof using compound of formula (I).
Organic light emitting diode containing a novel Ir complex as a phosphorescent emitter
申请人:Cheng Chien-Hong
公开号:US20050227109A1
公开(公告)日:2005-10-13
A phosphorescent Ir complex having the following structures (I) or (II) is used as an emitter in an organic light emitting diode (OLED):
wherein X is an arbitrary monoanionic bidentate ligand; Z is an arbitrary moiety constituting a nitrogen-containing heterocyclic group; R
1
is a substituent on the nitrogen-containing heterocyclic group; m is 0 or a positive integer; R
2
and R
3
independently are H, halogen, C1-C6 alkyl, a halogen-substituted C1-C6 alkyl, C1-C6 alkoxy, phenyl C1-C6 alkyl, amino, aryl, heterocyclic aryl substituent.
Nickel-catalyzed tandem conversion of paraformaldehyde : methanol to hydrogen and formate/chemo- and stereoselective hydrogenation of alkynes under neutral conditions
development of new catalytic protocols for clean and COx-free hydrogen generation from fundamental feedstocks is always interesting and challenging. Herein, we disclose nickel-catalyzed dihydrogen generation from a mixture of paraformaldehyde–methanol under base-free and activator-free conditions. The dihydrogen generation from this redox combination under neutral, oxidativecoupling conditions has been