Preparation of phase-transfer catalytic porous membrane by γ-ray irradiation grafting and its application in nucleophilic substitution reaction

2013 ◽  
Vol 448 ◽  
pp. 74-80 ◽  
Author(s):  
Zhiqian Jia ◽  
Tianli Zhen ◽  
Xiaoqin Zhang ◽  
Qingyang Gu
Keyword(s):  
Nucleophilic Substitution ◽  
Substitution Reaction ◽  
Phase Transfer ◽  
Porous Membrane ◽  
Nucleophilic Substitution Reaction ◽  
Γ Ray

Novel lariat calix[4]-1,3-aza-crowns with two branched chains — The excellent phase transfer catalysts for nucleophilic substitution reaction

2010 ◽  
Vol 88 (7) ◽  
pp. 622-627 ◽  
Author(s):  
Fafu Yang ◽  
Yanhua Wang ◽  
Hongyu Guo ◽  
Jianwei Xie ◽  
Zhiqiang Liu
Keyword(s):  
Nucleophilic Substitution ◽  
Substitution Reaction ◽  
Phase Transfer ◽  
Hard Metal ◽  
Nucleophilic Substitution Reaction ◽  
Phenyl Isothiocyanate ◽  
Phase Transfer Catalysts ◽  
H Nmr ◽  
Branched Chains ◽  
New Compounds

By reacting calix[4]-1,3-diethoxylaminoethyl derivative (2) with phenyl isothiocyanate, novel dendritic calix[4]arene derivative (3) with two different branched chains was synthesized in a yield of 78%. By reacting compound 2 with 1,6-diisocyanatohexane or N,N′-bis(2-chloracetamide)ethylene in a “1 + 1” intermolecular addition mode, novel lariat calix[4]-1,3-aza-crowns (4 and 5, respectively) with two branched ethoxyl chains were prepared in reasonable yields. The composition, structures, and conformations of all new compounds were confirmed by elemental analyses, IR, ESI-MS, 1H NMR, and so forth. The liquid–liquid extraction experiments showed that all new hosts possessed good extraction abilities towards soft and hard metal cations. The liquid membrane transport experiments suggested that they had good transport abilities for K+ and Ag+. The experiments of phase transfer catalysis indicated that they possessed excellent catalytic properties of aromatic nucleophilic substitution reaction and benzyl nucleophilic substitution. The optimum yields of products in catalytic reaction were as high as approximately 100%.

Environmentally benign nucleophilic substitution reaction of arylalkyl halides in water using CTAB as the inverse phase transfer catalyst

2019 ◽  
Vol 43 (40) ◽  
pp. 16041-16045 ◽  
Author(s):  
Atul K. Godha ◽  
Jayaraman Thiruvengadam ◽  
Viswanadhan Abhilash ◽  
Prajwal Balgi ◽  
A. V. Narayanareddy ◽  
...  
Keyword(s):  
Nucleophilic Substitution ◽  
Substitution Reaction ◽  
Phase Transfer ◽  
Phase Transfer Catalyst ◽  
Regioselective Synthesis ◽  
Environmentally Benign ◽  
Nucleophilic Substitution Reaction ◽  
Active Methylene Compounds ◽  
Active Methylene ◽  
Inverse Phase Transfer Catalyst

An environmentally benign, scalable and highly selective C-arylalkylation of active methylene compounds is developed using CTAB as the inverse phase transfer catalyst. The methodology is also applicable to the regioselective synthesis of N-aralkyl/alkyl 2-pyridones.

Phase Transfer Catalysis Method of Synthesis of Benzyl- and Benzhydryloxyalkoxyalkynes

2003 ◽  
Vol 2003 (3) ◽  
pp. 160-161 ◽  
Author(s):  
A. Matijos̆ka ◽  
O. Eicher-Lorka ◽  
L. Rastenytė
Keyword(s):  
Nucleophilic Substitution ◽  
Substitution Reaction ◽  
Phase Transfer Catalysis ◽  
Phase Transfer ◽  
Phase Transfer Catalyst ◽  
Nucleophilic Substitution Reaction

The synthesis of benzyl- and benzhydryloxyalkoxyalkynes and the determination of the influence of phase transfer catalyst, solvent and temperature on this nucleophilic substitution reaction is reported.

scholarly journals Synthesis of Carbohydrate Based Macrolactones and Their Applications as Receptors for Ion Recognition and Catalysis

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3394
Author(s):  
Surya B. Adhikari ◽  
Anji Chen ◽  
Guijun Wang
Keyword(s):  
Nucleophilic Substitution ◽  
Supramolecular Chemistry ◽  
Copper Sulfate ◽  
Substitution Reaction ◽  
Biological Properties ◽  
Anion Binding ◽  
Nucleophilic Substitution Reaction ◽  
Binding Properties ◽  
Intramolecular Nucleophilic Substitution ◽  
Leaving Groups

Glycomacrolactones exhibit many interesting biological properties, and they are also important in molecular recognitions and for supramolecular chemistry. Therefore, it is important to be able to access glycomacrocycles with different sizes and functionality. A new series of carbohydrate-based macrocycles containing triazole and lactone moieties have been designed and synthesized. The synthesis features an intramolecular nucleophilic substitution reaction for the macrocyclization step. In this article, the effect of some common sulfonate leaving groups is evaluated for macrolactonization. Using tosylate gave good selectivity for monolactonization products with good yields. Fourteen different macrocycles have been synthesized and characterized, of which eleven macrocycles are from cyclization of the C1 to C6 positions of N-acetyl D-glucosamine derivatives and three others from C2 to C6 cyclization of functionalized D-glucosamine derivatives. These novel macrolactones have unique structures and demonstrate interesting anion binding properties, especially for chloride. The macrocycles containing two triazoles form complexes with copper sulfate, and they are effective ligands for copper sulfate mediated azide-alkyne cycloaddition reactions (CuAAC). In addition, several macrocycles show some selectivity for different alkynes.

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