Detecting Thrombosis

A magnetic resonance (MR) probe can be used to distinguish old and new blood clots

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Studies of Removal of Indigo Caramine Dye from Water by Formaldehyde and Urea Treated Cellulosic Waste of Citrus reticulata Peels

 Citrus reticulata, Orange


Studies of Removal of Indigo Caramine Dye from Water by Formaldehyde and Urea Treated Cellulosic Waste of Citrus reticulata Peels



Asian J. Chem., 2014, 26(1), pp 43-47   |  DOI:10.14233/ajchem.2014.15305

Rabia Rehman*, Javaria Zafar and Hina Nisar

Institute of Chemistry, University of the Punjab, Lahore-54590, Pakistan

*Corresponding author: Fax: +92 42 99230998; 

Tel: +92 42 99230463, Ext: 870; E-mail: grinorganic@yahoo.com

The Citrus reticulata (orange) peels has been employed as adsorbents for removing inorganic and organic pollutants from wastewater extensively due to its low cost and eco-friendly nature. This research work concerns with the study of comparative removal of Indigo carmine dye from water using simple, formaldehyde and urea treated Citrus reticulata peels. The effect of adsorption parameters were investigated and maximum sorption capacity was obtained from Langmuir isotherm model at optimized conditions, i.e.: 5.90, 14.79 and 71.07 mg g-1 for simple, formaldehyde treated and urea treated Citrus reticulata peels, respectively. 

Feasibility of process is indicated by the values of separation factor, Gibb’s free energy and adsorption intensity ‘n’. The results of present study indicate that Citrus reticulata peels has inherited a lots of capacity for removing anthraquinone type of dyes, which can be further improved by treating with formaldehyde or urea in economical way.

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http://www.asianjournalofchemistry.co.in/User/ViewFreeArticle.aspx?ArticleID=26_2_12

Asian Journal of Chemistry

AN INTERNATIONAL PEER REVIEWED RESEARCH JOURNAL OF CHEMISTRY

Inst of Chem Eng , Univ of punjab, Pakistan




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Natural product based leads to fight against leishmaniasis

The growing incidence of parasitic resistance against generic pentavalent antimonials, specifically for visceral disease in Indian subcontinent, is a serious issue in Leishmania control. Notwithstanding the two treatment alternatives, that is amphotericin B and miltefosine are being effectively used but their high cost and therapeutic complications limit their use in endemic areas. In the absence of a vaccine candidate, identification, and characterization of novel drugs and targets is a major requirement of leishmanial research. This review describes current drug regimens, putative drug targets, numerous natural products that have shown promising antileishmanial activity alongwith some key issues and strategies for future research to control leishmaniasis worldwide

Natural product based leads to fight against leishmaniasis

 Review Article

Bioorganic & Medicinal Chemistry,Volume 22, Issue 1, 1 January 2014, Pages 18–45

Nisha Singh, Bhuwan B. Mishra, Surabhi BajpaiRakesh K. Singh, Vinod K. Tiwari
Molecular Immunology Laboratory, Department of Biochemistry, Faculty of Science, Banaras Hindu University, Varanasi 221005, India , Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi 221005, India 

http://www.sciencedirect.com/science/article/pii/S0968089613009887, 

VARANASI INDIA

New Organic Conjugated Molecules

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Anti-Markovnikov Hydrohydrazination

A rhodium-based catalyst reverses regioselectivity in the production of hydrazones

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Anti-Markovnikov Hydrohydrazination

Selection of boron reagents for Suzuki–Miyaura coupling

 Suzuki–Miyaura (SM) cross-coupling is arguably the most widely-applied transition metal catalysed carbon–carbon bond forming reaction to date. Its success originates from a combination of exceptionally mild and functional group tolerant reaction conditions, with a relatively stable, readily prepared and generally environmentally benign organoboron reagent. A variety of such reagents have been developed for the process, with properties that have been tailored for application under specific SM coupling conditions. This review analyses the seven main classes of boron reagent that have been developed. The general physical and chemical properties of each class of reagent are evaluated with special emphasis on the currently understood mechanisms of transmetalation. The methods to prepare each reagent are outlined, followed by example applications in SM coupling.
http://pubs.rsc.org/en/content/articlehtml/2014/cs/c3cs60197h

Review Article

Selection of boron reagents for Suzuki–Miyaura coupling

Alastair J. J. Lennox^a and   Guy C. Lloyd-Jones*^a  

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*

Corresponding authors

^a

School of Chemistry, University of Edinburgh, West Mains Road, Edinburgh, EH9 3JJ, UK

Chem. Soc. Rev., 2014,43, 412-443

DOI: 10.1039/C3CS60197H
Received 12 Jun 2013, First published online 03 Oct 2013 

 http://pubs.rsc.org/en/Content/ArticleLanding/2014/CS/c3cs60197h?utm_source=toc-alert&utm_medium=email&utm_campaign=pub-cs-vol-43-issue-1#!divAbstract
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 http://pubs.rsc.org/en/content/articlehtml/2014/cs/c3cs60197h
 DOI: 10.1039/C3CS60197H (Review Article) Chem. Soc. Rev. , 2014, 43, 412-443

Recent advances on diversity oriented heterocycle synthesis via multicomponent tandem reactions based on A3 coupling

ARKIVOC 2014 Part (i): Special Issue 'Reviews and Accounts', PG 1-20
Recent advances on diversity oriented heterocycle synthesis via multicomponent tandem reactions based on A³ coupling (14-8183LR) [pp. 1-20]
Yunyun Liu, a,b
a  Key Laboratory of Functional Small Organic Molecule, Ministry of Education, 
Jiangxi Normal University, Nanchang 330022, P. R. China 
b College of Chemistry and Chemical Engineering, Jiangxi Normal University, 

Nanchang 330022, P. R. China 

Full Text: PDF (235K)http://www.arkat-usa.org/get-file/48824/

A3 coupling reactions are the reactions between aldehydes, amines and alkynes, which yield
propargylamine derivatives under various catalyst conditions. By making use of the versatile
reactivity of propargylamines, tandem reactions initiated by the functional group(s) in the in situ
generated propargylamines constitute one of the most important applications of A3
 couplings.
These tandem reactions are especially useful for the synthesis of heterocyclic compounds. In this
review, the progress on multicomponent tandem reactions based on A3
 coupling is summarized.

Conclusions and Outlook

During the last decade, A3
 coupling reaction has evolved to a classical three-component protocol
for accessing various propargylamines. Numerous papers have been published on the
investigation of this synthetic method and spectacular advances on A3
 coupling reactions have
been witnessed in terms of green catalyst system, asymmetric catalysis etc. which also promoted
this coupling protocol as the most preferred option for propargylamine synthesis. From the
perspective of application, the propargylamines possessed broad spectrum of diversity andreactivity, and these compounds could serve as main building blocks in the synthesis of many
organic small molecules. From the perspective of atom economics, devising tandem reactions
based on key transformation of A3
 coupling for the synthesis of more complex and structurally
diverse heterocyclic products in one-pot represent a promising direction in modern organic
synthesis. As introduced in the contents, many elegant results have already been reported on this
area. On the other hand, at current state, this kind of tandem reactions were mainly performed by
using the second functional group in aldehyde, amine or alkyne to initiate subsequent
transformations on propargylamine intermediates, although some reactions using additional
components such as carbon dioxide to design tandem synthesis of heterocyclic products have
also been reported, this kind of examples are still rather rare. Thus, deeper and broader explore is
still demanding since using additional substrates for reactions is theoretically able to provide
considerably higher diversity both in reactions and corresponding products. In addition, versions
of asymmetric catalysis on traditional A3
 coupling have already been accomplished with nice
results, while asymmetric catalysis protocols of A3
 coupling-based tandem synthesis of
heterocycles kept unexplored, more systematic and advanced approaches of asymmetrical
catalysis on these tandem reactions are expected in future.



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Some of the thousands of life-sizeTerracotta Warriors of the Qin Dynasty, ca. 210 BCE

The Great Wall of China was built by several dynasties over two thousand years to protect the sedentary agricultural regions of the Chinese interior from incursions by nomadic pastoralists of the northern steppes

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