Design and Fabrication of Novel Polymerized Dual Nature Ionic Liquid as Highly Effective Catalyst for Regioselective Synthesis of Monospiro Derivatives

2021 ◽  
pp. 117800
Author(s):  
Zahra Elyasi ◽  
Gholam Reza Najafi ◽  
Javad Safaei Ghomi
Keyword(s):  
Ionic Liquid ◽  
Regioselective Synthesis ◽  
Dual Nature ◽  
Effective Catalyst ◽  
Highly Effective

Ionic Liquid Mediated Aluminium Sulfate: Highly Effective Catalyst for Synthesis of the Acetalization Reaction

2012 ◽  
Vol 550-553 ◽  
pp. 248-251
Author(s):  
Qi Lin ◽  
Hui Rong Zheng ◽  
Li Wei Wang ◽  
Yi Ting Chen
Keyword(s):  
Ionic Liquid ◽  
Synergistic Effect ◽  
Dimethyl Ether ◽  
Ethyl Acetoacetate ◽  
Reaction Conditions ◽  
Aluminium Sulphate ◽  
Effective Catalyst ◽  
Aluminium Sulfate ◽  
Highly Effective ◽  
Acetalization Reaction

The acetalization reaction of ethyl acetoacetate (EAA) with 1,2-propanediol (PPO) was performed efficiently in ionic liquid using aluminium sulfate as catalyst. The synergistic effect between aluminium sulphate and ionic liquid [bmim]BF4 on the acetalization was observed. An EAA conversion of 89.6% with the fructone selectivity of above 99.0% was achieved under the optimized reaction conditions. After the reaction was completed, the products could be easily separated from the reaction mixture extracted by dimethyl ether, and the catalyst and ionic liquid could be directly recycled several times without a significant decrease in the activity and selectivity towards fructone.

l-Prolinal Dithioacetal: A Highly Effective Organocatalyst for the Direct Nitro-Michael Addition to Selected Cyclic and Aromatic Ketones

Synthesis ◽  
2019 ◽  
Vol 51 (17) ◽  
pp. 3356-3368
Author(s):  
Piotr Pomarański ◽  
Zbigniew Czarnocki
Keyword(s):  
Michael Addition ◽  
Ring Size ◽  
Cyclic Ketones ◽  
Asymmetric Syntheses ◽  
Aromatic Ketones ◽  
Ring Systems ◽  
Effective Catalyst ◽  
Acetophenone Derivatives ◽  
Highly Effective ◽  
Related Compounds

The synthesis of novel l-prolinal dithioacetal and its application as an organocatalyst for the direct Michael addition of cyclic ketones and acetophenone derivatives to trans-β-nitrostyrene and related compounds is described. The prolinal dithioacetal acts as effective catalyst in the case of cyclic ketones of different ring size, in particular five- and six-membered examples, as well as larger and smaller ring systems. High enantioselectivity and diastereoselectivity is observed for different substrates and trans-β-nitrostyrenes. Also, the first asymmetric syntheses of selected 2-methyl-4-nitro-1,3-diphenylbutan-1-one derivatives by application of the obtained organocatalyst is presented.

Cross β-alkylation of primary alcohols catalysed by DMF-stabilized iridium nanoparticles

2021 ◽  
Author(s):  
Masaki Kobayashi ◽  
Hiroki Yamaguchi ◽  
Takeyuki Suzuki ◽  
Yasushi Obora
Keyword(s):  
Primary Alcohols ◽  
Recycling Process ◽  
Catalyst Recycling ◽  
Simple Method ◽  
Benzyl Alcohols ◽  
Effective Catalyst ◽  
Iridium Nanoparticles ◽  
Highly Effective ◽  
Linear Alcohols ◽  
The Cross

A simple method for the cross β-alkylation of linear alcohols with benzyl alcohols in the presence of DMF-stabilized iridium nanoparticles was developed. Furthermore, a highly effective catalyst-recycling process was also developed.

Highly Effective Catalyst for the Reaction of Trialkylphosphites with C˭X Electrophiles

2011 ◽  
Vol 186 (4) ◽  
pp. 796-798 ◽  
Author(s):  
Olga O. Kolodiazhna ◽  
Anastasia O. Kolodiazhna ◽  
Oleg I. Kolodiazhnyi
Keyword(s):  
Effective Catalyst ◽  
Highly Effective

Pd-PEPPSI-IPentCl: A Highly Effective Catalyst for the Selective Cross-Coupling of Secondary Organozinc Reagents

2012 ◽  
Vol 51 (45) ◽  
pp. 11354-11357 ◽  
Author(s):  
Matthew Pompeo ◽  
Robert D. J. Froese ◽  
Niloufar Hadei ◽  
Michael G. Organ
Keyword(s):  
Cross Coupling ◽  
Effective Catalyst ◽  
Highly Effective ◽  
Organozinc Reagents

Ethylenediamine: A Highly Effective Catalyst for One-Pot Synthesis of Aryl Nitroalkenes via Henry Reaction and Dehydration

2012 ◽  
Vol 30 (12) ◽  
pp. 2827-2833 ◽  
Author(s):  
Jianxin Yang ◽  
Jing Dong ◽  
Xia Lü ◽  
Qiang Zhang ◽  
Wei Ding ◽  
...  
Keyword(s):  
Henry Reaction ◽  
One Pot ◽  
Effective Catalyst ◽  
One Pot Synthesis ◽  
Highly Effective
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