Synthesis of Substituted 1,4‐Dihydropyridines in Water Using Phase‐Transfer Catalyst Under Microwave Irradiation

2004 ◽  
Vol 34 (23) ◽  
pp. 4349-4357 ◽  
Author(s):  
Hojatollah Salehi ◽  
Qing‐Xiang Guo
Keyword(s):  
Microwave Irradiation ◽  
Phase Transfer ◽  
Phase Transfer Catalyst

Solvent-Free Synthesis of N-Arylfulleropyrrolidine Derivatives Without Using Phase-Transfer Catalyst Under Microwave Irradiation

2010 ◽  
Vol 40 (4) ◽  
pp. 580-586 ◽  
Author(s):  
Bo Jin ◽  
Ru-Fang Peng ◽  
Wen-Ning Yang ◽  
Kai Wang ◽  
Bang-Qun Yuan ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Phase Transfer ◽  
Solvent Free ◽  
Phase Transfer Catalyst ◽  
Solvent Free Synthesis

scholarly journals Synthesis of 5-arylidene-3-methylrhodanines catalyzed by 1-butyl-3-methylimidazolium chloride in water under microwave irradiation condition

2016 ◽  
Vol 19 (2) ◽  
pp. 58-63
Author(s):  
Giau Hoang Le ◽  
Duong Thi Thuy Ngo ◽  
Dong Ut Thanh ◽  
Fritz Duus
Keyword(s):  
Microwave Irradiation ◽  
Phase Transfer ◽  
Aldol Condensation ◽  
Aromatic Aldehydes ◽  
Phase Transfer Catalyst ◽  
Irradiation Condition ◽  
First Time

Six 5-arylidene-3-methylrhodanine derivatives were synthesized by the crossed aldolization of aromatic aldehydes with 3- methylrhodanine using 1-butyl-3- methylimidazolium chloride ([BMI]Cl) as phase transfer catalyst in water. The reactions, under microwave irradiation (160 watts) during 10 minutes, afforded the yield of 59–83 %. This is the first time [BMI]Cl was used as phase transfer catalyst in the aldol condensation.

A green procedure for the synthesis of cinnamate esters using Aliquat®336

2005 ◽  
Vol 2005 (10) ◽  
pp. 629-631 ◽  
Author(s):  
Tanusri Mahapatra ◽  
Amarendra Patra ◽  
Alok Kumar Mitra
Keyword(s):  
Ionic Liquid ◽  
Liquid Phase ◽  
Green Chemistry ◽  
Microwave Irradiation ◽  
Liquid Medium ◽  
Phase Transfer ◽  
Phase Transfer Catalyst ◽  
Solid Liquid ◽  
Green Procedure ◽  
Ionic Liquid Medium

As an effective solid-liquid phase-transfer catalyst as well as an ionic liquid medium Aliquat® 336 has been applied in the synthesis of cinnamate esters under mild green chemistry procedures involving microwave irradiation.

Halogen-Exchange Fluorination of Chlorinated Benzaldehydes and Diphenyl Ketones Promoted by Microwave

2011 ◽  
Vol 266 ◽  
pp. 292-295
Author(s):  
Zheng Yong Liang ◽  
Chun Xu Lü
Keyword(s):  
Reaction Time ◽  
Microwave Irradiation ◽  
Phase Transfer ◽  
Phase Transfer Catalyst ◽  
Conventional Heating ◽  
Aprotic Solvents ◽  
Microwave Effect ◽  
Halogen Exchange ◽  
Enhanced Yield

Fluorinated benzaldehydes and diphenyl ketones were synthesized via halogen-exchange fluorination in less polar aprotic solvents in the presence of phase transfer catalyst, with or without the irradiation of microwave. The products were easily obtained with significantly enhanced yield and selectivity with microwave irradiation when compared with conventional heating. The yield of products was in the range of 52.0%~94.2%, and the reaction time can be shortened by more than 90% at most in comparison with common heating. In addition, special microwave effect is obvious when reaction was carried in medium polar aprotic solvents. Therefore, more aprotic solvents can be used in halogen-exchange fluorination under the irradiation of microwave.

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