Issue 4

 

Table of Contents , Vol 1, Issue 4

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1  Sushil Kumar Sharma and D. D Agarwal. Synthesis of cetylpyridiniumtribromide (CetPyTB) reagent by noble synthetic route and bromination of organic compounds using CetPyTB. Chemistry International 1(4) (2015) 164-173.

 

ABSTRACT

Cetylpyridiniumtribromide (CetPyTB) has been produced by a noble synthetic path protocol and its reactivity studied. Result indicates that the reagent shows good capability as a brominating agent for carbon/electron-rich heterocyclic aromatic compounds in addition to an efficient catalyst for acetylation of the alcohols, therefore proving it to be a note-worthy addition to the current organic tribromide reagents.

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Asif, M., 2015. Anti-neuropathic and anticonvulsant activities of various substituted triazoles analogues. Chemistry International 1(4), 174-183.

ABSTRACT

Various heterocyclic compounds along their derivatives were evaluated for their
biological activities as antiviral, antitumor, anticonvulsant, antibacterial, antifungal,
antituberculosis, analgesic, anti-inflammatory, antidiabetic, antihistamine and other biological activities. The triazole moiety seems to be very small, but in the biological profile has attracted the attention of many researchers to explore this skeleton to its multiple potential against several activities. The triazole derivatives possess a great importance in medicinal chemistry and can be used for the synthesis of numerous heterocyclic compounds with different biological activities. This review article covers the information of triazoles derivatives having different psychopharmacological actions. Thus triazole acts as a promising medicinal agent for the scientists working over this field. This review can be helpful to develop various more new compounds possessing triazoles moiety that could be better in terms of efficacy and lesser toxicity.

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A.V. Rane, V.K. Abitha, Anagha Sabnis, Mukesh Kathalewar, Vandana Jamdar, Shivendra Patil and P. Jayaja. 2015. A greener and sustainable approach for converting polyurethane foam rejects into superior polyurethane coatings. Chemistry International 1(4) (2015) 184-195.

ABSTRACT

 Recycling is a crucial area of research in Green Polymer Chemistry. Various developments in recycling are driven by Environmental concerns, interest in sustainability and desire to decrease the dependence on non-renewable petroleum based materials. Polyurethane foams [PUF] are widely used due to their light weight and superior heat insulation as well as good mechanical properties. As per survey carried Polyurethane Foam Association, 12 metric tonnes of polyurethane foam are discharged during manufacturing and/or processing and hence recycling of PUF is necessary for better economics and ecological reasons. In present study, rejects of PUF is subjected to reaction with a diethylene amine in presence of sodium hydroxide [NaOH] as catalyst, as a result depolymerised product containing hydroxyl and amine groups is obtained. Conventional and Microwave reaction for depolymerizing polyurethane foam have been carried, and best results are obtained by Microwave reaction.  Further depolymerised product with hydroxyl and amine functionalities are reacted with bis (2-hydroxyethyl terephthalate) [BHET] obtained by recycling polyethylene terephthalate [PET] and sebacic acid, with stannous oxalate [FASCAT 2100 series] as catalyst to obtain Polyester amides. These Polyester amides having hydroxyl and amino groups in excess are cured with isocyanates - Hexamethylene diisocyanate biuret [HDI biuret] and Isophorone diisocyanate [IPDI] for coating applications. The coated films are characterized using physical, mechanical and chemical tests, which shows comparable physical, mechanical properties but alkali resistance is poor.

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Elvia, R., Cahyana, A.H., Wibowo, W. 2015. Catalytic acetylation of (+)-cedrol with heterogeneous catalyst H2SO4/SiO2 under solvent free conditions. Chemistry International 1(4) (2015) 196-201

ABSTRACT

Heterogeneous catalyst, H2SO4/SiO2 was synthesized by immobilizing sulfuric acid on silica gel as solid support. Silica gel was prepared from kaolin, originating from Belitung island Indonesia. The synthesized catalyst was characterized by various techniques such as X-Ray diffraction, Scanning Electron Microscopy, Fourier Transform Infrared Spectroscopy and BET method and was applied for the acetylation of (+)-cedrol compound using acetic anhydride under solvent free conditions.  The optimum conditions for catalytic acetylation were found at 353 K for 20 h reaction period, the molar ratio (+)-cedrol/acetic anhydride 1:10 in the presence of  5%-w of catalyst converted 88,7% (+)-cedrol into cedryl acetate. Results revealed catalyst could possibly used cedryl acetate synthesis from (+)-cedrol.

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Nikesh B. Samarth, Vinayak Kamble, Prakash A. Mahanwar, Ajay Vasudeo Rane, Abitha V. K. 2015. A historical perspective and the development of molecular imprinting polymer-A review. Chemistry International 1(4) 202-210

ABSTRACT

Molecular imprinting is an emerging technology which enables us to synthesize the materials with highly specific receptor sites towards the target molecules. Molecularly imprinted polymers (MIPs) are a class of highly cross-linked polymer that can bind certain target compound with high specificity. Such techniques have been progressively employed in a wide scope of applications such as development of various analytical techniques such as solid-phase extraction (SPE), liquid chromatography, capillary electro chromatography, binding assays and biosensors, mostly in bio-analytical areas. The aim of this review paper is to give a fundamental description  of the molecular imprinted polymer and to give the reader an insight into the main developments are discussed, Particular emphasis will be placed on their role as affinity materials in separation science. Discussing first general aspects in MIP history and preparation and then dealing with various application aspects.

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