Deep eutectic solvents as H2-sources for Ru(II)-catalyzed transfer hydrogenation of carbonyl compounds under mild conditions

Tetrahedron ◽  
2021 ◽  
pp. 131997
Author(s):  
Marzia Cavallo ◽  
Davide Arnodo ◽  
Alberto Mannu ◽  
Marco Blangetti ◽  
Cristina Prandi ◽  
...  
Keyword(s):  
Carbonyl Compounds ◽  
Deep Eutectic Solvents ◽  
Transfer Hydrogenation ◽  
Mild Conditions

Enantioselective Radical Functionalization of Imines and Iminium Intermediates via Visible Light Photoredox Catalysis

Synthesis ◽  
2020 ◽  
Author(s):  
Jia-Jia Zhao ◽  
Hong-Hao Zhang ◽  
Shouyun Yu
Keyword(s):  
Visible Light ◽  
Asymmetric Synthesis ◽  
Carbonyl Compounds ◽  
Asymmetric Reduction ◽  
Chemical Transformations ◽  
Photoredox Catalysis ◽  
Radical Coupling ◽  
Mild Conditions ◽  
Iminium Ions ◽  
Radical Functionalization

Visible light photoredox catalysis has recently emerged as a powerful tool for the development of new and valuable chemical transformations under mild conditions. Visible-light promoted enantioselective radical transformations of imines and iminium intermediates provide new opportunities for the asymmetric synthesis of amines and asymmetric β-functionalization of unsaturated carbonyl compounds. In this review, the advance in the catalytic asymmetric radical functionalization of imines, as well as iminium intermediates, are summarized. 1 Introduction 2 The enantioselective radical functionalization of imines 2.1 Asymmetric reduction 2.2 Asymmetric cyclization 2.3 Asymmetric addition 2.4 Asymmetric radical coupling 3 The enantioselective radical functionalization of iminium ions 3.1 Asymmetric radical alkylation 3.2 Asymmetric radical acylation 4 Conclusion

Rapid synthesis of aurones under mild conditions using a combination of microwaves and deep eutectic solvents

2017 ◽  
Vol 58 (3) ◽  
pp. 240-241 ◽  
Author(s):  
Kimberly M. Taylor ◽  
Zachary E. Taylor ◽  
Scott T. Handy
Keyword(s):  
Deep Eutectic Solvents ◽  
Rapid Synthesis ◽  
Mild Conditions

Synthesis of aminomethyl quinazoline based ruthenium (II) complex and its application in asymmetric transfer hydrogenation under mild conditions

2016 ◽  
Vol 819 ◽  
pp. 189-193 ◽  
Author(s):  
Ahmet Agac ◽  
Idris Karakaya ◽  
Irfan Sahin ◽  
Sedat Emir ◽  
Semistan Karabuga ◽  
...  
Keyword(s):  
Transfer Hydrogenation ◽  
Asymmetric Transfer Hydrogenation ◽  
Mild Conditions

ChemInform Abstract: Advances in Transfer Hydrogenation of Carbonyl Compounds in Water

ChemInform ◽  
2015 ◽  
Vol 46 (16) ◽  
pp. no-no
Author(s):  
Yan-Mei He ◽  
Qing-Hua Fan
Keyword(s):  
Carbonyl Compounds ◽  
Transfer Hydrogenation

scholarly journals Purification of Kraft cellulose under mild conditions using choline acetate based deep eutectic solvents

2020 ◽  
Vol 22 (24) ◽  
pp. 8680-8691
Author(s):  
Greta Colombo Dugoni ◽  
Andrea Mezzetta ◽  
Lorenzo Guazzelli ◽  
Cinzia Chiappe ◽  
Monica Ferro ◽  
...  
Keyword(s):  
Deep Eutectic Solvents ◽  
Mild Conditions

Novel choline acetate based deep eutectic solvents (DESs) solubilize hemicellulose up to 45 wt% at 80 °C. A PoC test on Kraft cellulose illustrates the cellulose/hemicellulose separation.

Recyclable Covalent Triazine Framework-based Ru Catalyst for Transfer Hydrogenation of Carbonyl Compounds in Water

2019 ◽  
Vol 7 (9) ◽  
pp. 8893-8899 ◽  
Author(s):  
Sudakar Padmanaban ◽  
Gunniya Hariyanandam Gunasekar ◽  
Mearae Lee ◽  
Sungho Yoon
Keyword(s):  
Carbonyl Compounds ◽  
Transfer Hydrogenation ◽  
Ru Catalyst ◽  
Covalent Triazine Framework

scholarly journals Catalytic Activity of High-Surface-Area Amorphous MgO Obtained from Upsalite

Catalysts ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1338
Author(s):  
Marek Gliński ◽  
Ewa M. Iwanek (nee Wilczkowska) ◽  
Urszula Ulkowska ◽  
Agnieszka Czajka ◽  
Zbigniew Kaszkur
Keyword(s):  
Surface Area ◽  
Carbonyl Compounds ◽  
Main Product ◽  
High Surface ◽  
High Surface Area ◽  
Hydrogenation Reaction ◽  
Transfer Hydrogenation ◽  
Reaction Conditions ◽  
Synthesis Conditions ◽  
Transfer Hydrogenation Reaction

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.

Erbium-Catalyzed Regioselective Isomerization–Cobalt-Catalyzed Transfer Hydrogenation Sequence for the Synthesis of Anti-Markovnikov Alcohols from Epoxides under Mild Conditions

ACS Catalysis ◽  
2020 ◽  
Vol 10 (22) ◽  
pp. 13659-13667
Author(s):  
Xin Liu ◽  
Lars Longwitz ◽  
Brian Spiegelberg ◽  
Jan Tönjes ◽  
Torsten Beweries ◽  
...  
Keyword(s):  
Transfer Hydrogenation ◽  
Mild Conditions
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