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.

scholarly journals Facile Condensation of Aromatic Aldehydes with Chroman-4-ones and 1-Thiochroman-4-ones Catalysed by Amberlyst-15 under Microwave Irradiation Condition

2011 ◽  
Vol 8 (2) ◽  
pp. 863-869 ◽  
Author(s):  
Tapas K. Mandal ◽  
Rammohan Pal ◽  
Rina Mondal ◽  
Asok K. Mallik
Keyword(s):  
Microwave Irradiation ◽  
Aldol Condensation ◽  
Aromatic Aldehydes ◽  
Solvent Free ◽  
Environmentally Benign ◽  
High Yield ◽  
Irradiation Condition ◽  
Free Condition ◽  
Amberlyst 15 ◽  
Solvent Free Condition

Different aromatic aldehydes and cinnamaldehyde undergo cross-aldol condensation with chroman-4-ones and1-thiochroman-4-ones in the presence of amberlyst-15 under microwave irradiation in solvent free condition to afford rapidly the correspondingE-3-arylidene andE-3-cinnamylidene derivatives, respectively, in high yield. This process is simple, efficient and environmentally benign.

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

DMAP-catalyzed Efficient and Convenient Approach for the Synthesis of 3,3′-(Arylmethylene)bis(2-Hydroxynaphthalene-1,4-Dione) Derivatives

2021 ◽  
Vol 16 (9) ◽  
pp. 1934578X2110458
Author(s):  
Le Nhat Thuy Giang ◽  
Dang Thi Tuyet Anh ◽  
Hoang Thi Phuong ◽  
Nguyen Ha Thanh ◽  
Nguyen Thi Quynh Giang ◽  
...  
Keyword(s):  
Reaction Time ◽  
Microwave Irradiation ◽  
Aromatic Aldehydes ◽  
Environmentally Benign ◽  
Basic Catalyst ◽  
Reaction Conditions ◽  
Efficient Procedure ◽  
Short Reaction Time ◽  
Convenient Approach ◽  
First Time

For the first time the 4-dimethylaminopyridine (DMAP) catalyzed straightforward and efficient procedure has been developed for the synthesis of 3,3′-(arylmethylene) bis(2-hydroxynaphthalene-1,4-dione) derivatives starting from lawsone (2-hydroxy-1,4-naphthoquinone) and a variety of (hetero)aromatic aldehydes in ethanol under microwave irradiation. Three of nine synthesized compounds are new. This method provides notable advantages over existing procedures including use of non-traditional basic catalyst and environmentally benign solvent, mild reaction conditions, excellent yields, short reaction time and simple workup.

scholarly journals Covalent functionalization of N-doped graphene by N-alkylation

2015 ◽  
Vol 51 (95) ◽  
pp. 16916-16919 ◽  
Author(s):  
M. Barrejón ◽  
A. Primo ◽  
M. J. Gómez-Escalonilla ◽  
José Luis G. Fierro ◽  
H. García ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Band Gap ◽  
Optical Band Gap ◽  
Phase Transfer Catalysis ◽  
Phase Transfer ◽  
Covalent Functionalization ◽  
Doped Graphene ◽  
First Time

N-Functionalization of N-graphene is described by the first time. It can be efficiently achieved combining phase transfer catalysis and microwave irradiation. The influence of functionalization on the optical band gap is studied.

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.

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