1-Substituted-imidazo[1,5-a]pyridin-3-ylidenes as Highly Efficient Ligands for Rh- and Ir-catalyzed Transfer Hydrogenation of Carbonyl Compounds

2016 ◽  
Vol 45 (11) ◽  
pp. 1327-1329 ◽  
Author(s):  
Yuma Koto ◽  
Fumitoshi Shibahara ◽  
Toshiaki Murai
RSC Advances ◽  
2014 ◽  
Vol 4 (53) ◽  
pp. 27955-27962 ◽  
Author(s):  
S. Ganesamoorthy ◽  
P. Jerome ◽  
K. Shanmugasundaram ◽  
R. Karvembu

[Ru(acac)2(CH3CN)2] and its SiO2 immobilized form were found to be efficient catalysts for the transfer hydrogenation of carbonyl compounds.


ChemInform ◽  
2015 ◽  
Vol 46 (13) ◽  
pp. no-no
Author(s):  
Dinesh Talwar ◽  
Xiaofeng Wu ◽  
Ourida Saidi ◽  
Noemi Poyatos Salguero ◽  
Jianliang Xiao

2014 ◽  
Vol 20 (40) ◽  
pp. 12835-12842 ◽  
Author(s):  
Dinesh Talwar ◽  
Xiaofeng Wu ◽  
Ourida Saidi ◽  
Noemí Poyatos Salguero ◽  
Jianliang Xiao

2019 ◽  
Vol 7 (9) ◽  
pp. 8893-8899 ◽  
Author(s):  
Sudakar Padmanaban ◽  
Gunniya Hariyanandam Gunasekar ◽  
Mearae Lee ◽  
Sungho Yoon

Catalysts ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1338
Author(s):  
Marek Gliński ◽  
Ewa M. Iwanek (nee Wilczkowska) ◽  
Urszula Ulkowska ◽  
Agnieszka Czajka ◽  
Zbigniew Kaszkur

The first aim of the research was to synthesize a pure Upsalite, which is an amorphous form of MgCO3, by modifying a procedure described in the literature, so that it would be the precursor of a high-surface, amorphous magnesium oxide. The results indicate that within the studied reaction conditions, the type of alcohol used as the reactant has the most pronounced effect on the yield of reaction. From the two alcohols that led to the highest yield of Upsalite, methanol gave a substantially larger surface area (794 vs. 191 m2 g−1). The optimized synthesis conditions of Upsalite were used to obtain MgO via thermolysis, whose activity in the transfer hydrogenation reaction (THR) from ethanol, 2-propanol and 2-pentanol to various carbonyl compounds was determined. The optimal conditions for the thermolysis were as follows: vacuum, T = 673 K as the final temperature, and a heating rate of 2 deg min−1. The high-surface, amorphous magnesia (SBET = 488 m2 g−1) was found to be a very selective catalyst to 4-t-butylcyclohexanone in THR, which led to a diastereoselectivity of over 94% to the E-isomer of 4-t-butylcyclohexanol for more than 3 h, with conversions of up to 97% with either 2-propanol or 2-pentanol as the hydrogen donor. In the case of acrolein and 2-n-propylacrolein being used as the hydrogen acceptors, the unsaturated alcohol (UOL) was the main product of the reaction, with higher UOL yields noted for ethanol than 2-propanol.


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