Enantioselective hydrogenation of methyl benzoylformate on an Ag electrode electrosorbed with cinchonine

RSC Advances ◽  
2014 ◽  
Vol 4 (58) ◽  
pp. 30584-30586 ◽  
Author(s):  
Hengpan Yang ◽  
Ting Lv ◽  
Wenwen Sun ◽  
Yanfang Du ◽  
Huan Wang ◽  
...  
Keyword(s):  
Enantioselective Hydrogenation ◽  
Ag Electrode ◽  
Methyl Benzoylformate ◽  
Excellent Selectivity

Cinchonine was demonstrated to be adsorbed on electrodeposited Ag for enantioselective hydrogenation with moderate ee and excellent selectivity.

π-Facial Selectivity in 1,3-Dipolar Cycloaddition Reactions of α-Methylidene-γ-lactone Substituted by 4-Methyl-2,6,7-trioxabicyclo[2.2.2]octan-1-yl Group in γ-Position

2002 ◽  
Vol 67 (3) ◽  
pp. 353-364 ◽  
Author(s):  
Petr Melša ◽  
Ctibor Mazal
Keyword(s):  
Double Bond ◽  
Carboxylic Acid ◽  
Nitrile Oxide ◽  
Dipolar Cycloaddition ◽  
Cycloaddition Reactions ◽  
Enantiomerically Pure ◽  
Nitrile Imine ◽  
Facial Selectivity ◽  
Excellent Selectivity

Diastereoselectivity of 1,3-dipolar cycloaddition reactions of benzyl azide, diazomethane, a nitrile oxide and a nitrile imine to α-methylidene-γ-lactone dipolarophile was effectively controlled by a bulky γ-substituent, 4-methyl-2,6,7-trioxabicyclo[2.2.2]octan-1-yl in γ-position of the dipolarophile. The dipoles added from the less hindered face of the double bond with an excellent selectivity. Enantiomerically pure dipolarophile was prepared from the easily available (S)-5-oxotetrahydrohydrofuran-2-carboxylic acid.

A thermoregulated phase transfer chiral Pt nanocatalyst for enantioselective hydrogenation of α-ketoesters

2020 ◽  
Vol 10 (23) ◽  
pp. 7824-7828
Author(s):  
Pu Chen ◽  
Yanhua Wang
Keyword(s):  
Phase Transfer ◽  
Enantioselective Hydrogenation

An efficient and recyclable thermoregulated phase transfer chiral Pt nanocatalyst was developed and applied to the enantioselective hydrogenation of α-ketoesters.

scholarly journals Immobilization of an Iridium(I)-NHC-Phosphine Catalyst for Hydrogenation Reactions under Batch and Flow Conditions

Catalysts ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 656
Author(s):  
Henrietta Kovács ◽  
Krisztina Orosz ◽  
Gábor Papp ◽  
Ferenc Joó ◽  
Henrietta Horváth
Keyword(s):  
Catalytic Activity ◽  
Ion Exchange ◽  
Heterogeneous Catalyst ◽  
Aqueous Phase ◽  
Levulinic Acid ◽  
Flow Reactor ◽  
High Catalytic Activity ◽  
Flow Conditions ◽  
Hydrogenation Reactions ◽  
Excellent Selectivity

Na2[Ir(cod)(emim)(mtppts)] (1) with high catalytic activity in various organic- and aqueous-phase hydrogenation reactions was immobilized on several types of commercially available ion-exchange supports. The resulting heterogeneous catalyst was investigated in batch reactions and in an H-Cube flow reactor in the hydrogenation of phenylacetylene, diphenylacetylene, 1-hexyne, and benzylideneacetone. Under proper conditions, the catalyst was highly selective in the hydrogenation of alkynes to alkenes, and demonstrated excellent selectivity in C=C over C=O hydrogenation; furthermore, it displayed remarkable stability. Activity of 1 in hydrogenation of levulinic acid to γ-valerolactone was also assessed.

Iridium‐Catalyzed Enantioselective Hydrogenation of 3‐Substituted Isoquinolinium Salts

2021 ◽  
Author(s):  
Bin Li ◽  
Jiaxin Wang ◽  
Xiaoye Li ◽  
Jiayue Xi ◽  
Ruoxuan Wang ◽  
...  
Keyword(s):  
Enantioselective Hydrogenation
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