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- Volume 9, Issue 1, 2012
Letters in Organic Chemistry - Volume 9, Issue 1, 2012
Volume 9, Issue 1, 2012
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Editorial
More LessLetters in Organic Chemistry has completed 8 years of its existence. As it enters its 9th year, we must all try harder to improve standards and increase the number of high quality publications in this important journal. I would like to thank the Associate Editors, Regional Editors and Editorial Board Members for their constant guidance and support. I would also like to thank Ms. Anila Mufti, Ms. Huma Iftekhar and Mr. Farrukh Im Read More
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Carbenoid Etherifications Catalyzed by “Green” Silver Nanoparticles and Iron-Copper Nanoparticles
Etherfication products were obtained from sodium salts of p-toluenesulfonylhydrazones in alcohol solutions at reflux temperature on treatment with catalytic amounts of iron-copper nanoparticles, and silver nanoparticles, which were prepared from Camellia sinensis natural extracts.
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Three Component Condensation Reaction as an Efficient Route for the Synthesis of Furo[2,3-d]pyrimidines
Authors: Ali Aminkhani and Ghasem MarandiThe condensation reactions of alkyl isocyanides with 1,3-dimethylbarbituric acid and aryl carboxaldehydes to afford 6-(alkylamino)-5-(3-aryl)-1,3-dimethylfuro[2,3-d]pyrimidine-2,4(1H,3H)-dione, in excellent yields under neutral conditions, are reported.
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A One Pot Green Synthesis of 3,4 Dihydropyrimidin-2-(1H)-ones/Thiones Catalyzed By MgO-ZrO2 Under Solvent-Free Conditions
Authors: Manoj B. Gawande, Deepak M. Nagrik and Damodar M. AmbhoreAn efficient green synthesis of 3,4-dihydropyrimidin-2-(1H)-ones/thiones (DHPMs) using MgO/ZrO2 as heterogeneous basic catalyst from an aldehyde, β-keto ester and urea/thiourea under solvent-free conditions is described. A variety of aldehydes were studied with β-keto ester and urea/thiourea giving good to excellent yield of corresponding 3,4-dihydropyrimidin-2-(1H)-ones/thiones. This protocol has advantage of e Read More
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A Green Method for the Synthesis of 3-Substituted Coumarins Catalyzed by L-Lysine in Water Via Knoevenagel Condensation
Authors: Xinwen You, Hua Yu, Mangang Wang, Jun Wu and Zhicai ShangL-lysine was applied to the synthesis of 3-substituted coumarins through the condensation of various salicylaldehyde with reactive methylene compounds in water. In this work, waste minimization, catalyst recovery, simple operation and easier product work-up were achieved.
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Ritter Reaction in Subcritical Water: An Efficient and Green Method for Amides Synthesis
Authors: Shengqian Jiang, Zhouyu Wang, Zhenju Jiang, Jianhui Li, Shulin Zhou and Long PuRitter reaction was carried out efficiently in subcritical water with catalytic amount of trifluoromethanesulfonic acid. The amides were formed in good to excellent yields from secondary alcohols and tert-butanol with various nitriles.
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Synthesis of Novel Tri-Arm Star Shaped 1,3,5-triazine Hydrazones from 2,4,6-tris(4-acetylphenoxy)-1,3,5-triazine Core
A series of novel symmetric triazine hydrazones [N3C3(-OC6H4-p-C(CH3)=N-NH-C(O)-C6H4-p-X)3] (X = H, Br, Cl, F, OH, OCH3, CH3, NO2, NH2) were prepared in excellent yields by a three-fold condensation reaction of 2,4,6- tris(4-acetylphenoxy)-1,3,5-triazine with p-substituted benzoic acid hydrazides [NH2-NH-C(O)-C6H4-p-X]. The structures were confirmed by FT-IR, 1H, 13C, 2D-HMQC NMR and mass spectrometry (MALDI-TOF).
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Synthesis and Voltammetric Behavior of Loracarbef Metal Complexes
Authors: Mustafa Cesme, Aysegul Golcu, Mustafa Dolaz, Mehmet Tumer, Huseyin Zengin and Sibel A. OzkanLoracarbef (HL), a second generation cephalosporin antibiotic, possesses various donor sites for interaction with transition metal ions such as Cu(II), Co(II), Fe(III) and Ru(III) to form complexes of the type [M(Cl)(HL)(H2O)]Cl (M: Cu(II), Co(II)] and [M(Cl)2(HL)(H2O)2]Cl (M: Fe(III), Ru(III)] with metal:ligand (M:L) molar ratio 1:1. These complexes were prepared and characterized by physicochemical and spectroscopic methods. Read More
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Efficient Synthesis of β-Acetamido Ketones Catalyzed by Cobalt Sulfate Heptahydrate Under Ultrasound Irradiation
Authors: Bao-Hua Chen, Ji-Tai Li, Guo-Feng Chen and Ya-Li SongUltrasound-promoted synthesis of β-acetamido ketones catalyzed by cobalt sulfate heptahydrate via one-pot multi-component reaction coupling of aromatic aldehyde, acetophenone and acetyl chloride in acetonitrile was carried out in excellent yields at 25-28 °C, providing an efficient synthesis of these compounds. The use of ultrasound increased the rate of reactions compared with reactions under reflux condition.
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Efficient Enantioselective Michael Addition of Nitroalkenes Catalyzed by a Surfactant-Type Bifunctional Thiourea Organocatalyst in the Presence of Water
More LessNew surfactant-type bifunctional thiourea organocatalysts 3 were synthesized. It was found that in the presence of 10 mol% PhCOOH, bifunctional thiourea bearing a long chain 3b in 10 mol% loading could smoothly catalyze the asymmetric Michael reaction of nitroalkenes 4 with cyclohexanone at room temperature in the presence of water, giving the desired adducts 5a-i in good yields (80 - 93%) with high diastereoselectivities ( Read More
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Intelligent Drug Delivery Systems Based on Modified Chitosan Nanoparticles
The purpose of this review is to discuss and summarize some of the interesting findings and applications of modified chitosan (MCS) and their derivatives in different areas of drug delivery. This review highlights the important applications of MCS in the design of various novel delivery systems like liposomes, microspheres, microcapsules, and nanoparticles. In addition to their well-known effects on drug solubility and dis Read More
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Ligand-Free Copper-Catalyzed Borylation of Aryl and Benzyl Halides with Bis(pinacolato)diboron
Authors: Guobing Yan, MingHua Yang and Jian YuThe CuBr-catalyzed cross-coupling reaction of aryl iodides with B2pin2 in the absence of ligand has been developed for the preparation of arylboronates. The reaction was also suitable for the borylation of aryl bromides and benzyl halides, albeit in moderate yields.
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Non-Symmetric Liquid Crystal Dimers Containing Azobenzene and 1,3,4- Oxadiazole Group: Synthesis and Mesomorphic Behaviour
Authors: Binglian Bai, Haitao Wang, Xiaolong Lin, Xia Ran, Chengxiao Zhao and Min LiWe report on the synthesis and mesomorphic behaviour of a new series of non-symmetric liquid crystal dimers with long terminal chains containing 1,3,4-oxadiazole group and azobenzene group as the mesogenic units. These nonsymmetric liquid crystal dimers are evidenced to display monolayer smectic A phase. Microphase segregation and specific intermolecular interactions between the two different mesogenic units Read More
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Volumes & issues
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Volume 22 (2025)
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Volume 21 (2024)
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Volume 20 (2023)
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Volume 19 (2022)
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Volume 18 (2021)
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Volume 17 (2020)
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Volume 16 (2019)
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Volume 15 (2018)
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Volume 14 (2017)
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Volume 13 (2016)
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Volume 12 (2015)
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Volume 11 (2014)
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Volume 10 (2013)
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Volume 9 (2012)
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Volume 8 (2011)
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Volume 7 (2010)
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Volume 6 (2009)
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Volume 5 (2008)
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Volume 4 (2007)
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Volume 3 (2006)
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Volume 2 (2005)
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Volume 1 (2004)
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