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Catalytic Synthesis of -Aminonitriles Using Nano Copper Ferrite under Green Conditions (2014)

Ali Gharib, Nader Noroozi Pesyan, Leila Vojdani Fard, and Mina Roshani

Hindawi

In: Organic Chemistry International

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Publication Date: 2014-03-13

Description: Copper ferrite nanomaterial as reusable heterogeneous initiator in the synthesis of α-aminonitriles. The nanocatalyst is easily recovered and its reusability is recorded. Synthesis of α-aminonitriles derivatives by one-pot reaction of different aldehydes with amines and trimethylsilyl cyanides has been developed using nano copper ferrite catalyst under room temperature and green solvent (water as solvent) conditions. α-aminonitriles are important in preparing a wide variety of amino acids, amides, diamines, and nitrogen containing heterocycles.

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Electronic ISSN: 2090-2018

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An Efficient One-Pot Multi-Component Synthesis of 3,4-Dihydropyrimidin-2-(1H)-Ones/Thiones Catalyzed by Bismuth (III) Sulfate Trihydrate under Solvent-Free Conditions (2014)

Farhad Hatamjafari

Hindawi

In: Organic Chemistry International

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Publication Date: 2014-03-13

Description: A convenient and efficient protocol for the one-pot synthesis of 3,4-dihydropyrimidin-2-(1H)-one/thione derivatives of aldehydes, and 1,3-dicarbonyl compounds with Bismuth (III) sulfate trihydrate as the catalyst was described. We had the advantages of good performance, simplicity, and short time reaction under solvent-free conditions. The catalyst can be repeatedly reused without loss of its activity.

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Glycerol Containing Triacetylborate Mediated Syntheses of Novel 2-Heterostyryl Benzimidazole Derivatives: A Green Approach (2014)

Ashok Kumar Taduri, P. N. Kishore Babu, and B. Rama Devi

Hindawi

In: Organic Chemistry International

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Publication Date: 2014-04-28

Description: A very simple, mild, efficient, and novel green methodology has been developed for the syntheses of some 2-hetero/styryl-benzimidazoles. Title compounds were synthesized by the condensation of -phenylenediamine with cinnamic acids at 150–180°C for 5-6 h using glycerol containing triacetylborate (10–20 mol%) as the reaction medium. In an alternative approach, condensation of 2-methylbenzimidazole derivatives with aromatic aldehydes was done using glycerol containing triacetylborate (10–20 mol%) as the reaction medium.

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Synthesis of Novel Symmetrical and Unsymmetrical o-Phthalic Acid Diamides (2014)

Padam Praveen Kumar, Yervala Dathu Reddy, Chittireddy Venkata Ramana Reddy, Bhoomireddy Rama Devi, and Pramod Kumar Dubey

Hindawi

In: Organic Chemistry International

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Publication Date: 2014-05-06

Description: Phthalic anhydride was treated with secondary amines in acetic acid yielding 2-(diethyl (or) 4-alkylpiperazine or morpholine-1-carbonyl) benzoic acids. The latter were reacted, again, with secondary amines and arylamines by using the coupling reagent HATU and Et3N as a base in DMF giving the novel symmetrical o-phthalic acid diamides , unsymmetrical o-phthalic acid diamides , and primary amidic-secondary amidic containing unsymmetrical o-phthalic acid diamides , respectively.

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In Quest of “Stereoselective Switch” for On-Water Hydrothiolation of Terminal Alkynes Using Different Additives and Green Synthesis of Vicinal Dithioethers (2014)

Basudeb Basu, Kinkar Biswas, Samir Kundu, and Debasish Sengupta

Hindawi

In: Organic Chemistry International

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Publication Date: 2014-02-14

Description: On-water hydrothiolation reaction between terminal alkyne and thiol has been probed in the presence of various additives. Aromatic alkynes yield corresponding 1-alkenyl sulfides, whereas aliphatic alkynes undergo double-addition yielding vicinal disulfides in good to excellent yields. Formation of 1-alkenyl sulfides proceeds with a high degree of regioselectivity (via anti-Markovnikov addition), and switching the stereoselectivity between E/Z isomers has been noticeably realized in the presence of different additives/promoters.

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Microwave Assisted Solvent-Free Synthesis of Some Imine Derivatives (2014)

Yunus Bekdemir and Kürşat Efil

Hindawi

In: Organic Chemistry International

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Publication Date: 2014-03-27

Description: Some imine derivatives (1a–7d) were synthesized using a rapid and an environmentally friendly method with reaction of aromatic aldehydes (a–d) and aromatic amines (1–7) (in 1 : 1 molar ratio) in the presence of -ethoxyethanol as a wetting reagent (2 drops) under solvent-free conditions using microwave heating.

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Synthesis and Biological Evaluation of 4-(3-Hydroxy-benzofuran-2-yl)coumarins (2014)

Puttaraju Boregowda, Shivashankar Kalegowda, Vijaykumar Pandurang Rasal, Jagadeeshreddy Eluru, and Ebenezer Koyye

Hindawi

In: Organic Chemistry International

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Publication Date: 2014-03-28

Description: Various 4-bromomethylcoumarins (1a-k) were reacted with methyl salicylate to yield 2-(2-oxo-2H-chromen-4-ylmethoxy)-benzoic acid methyl esters (2a-k). Formations of (3a-k) were achieved by using DBU under microwave irradiation. Structures of all the compounds were established on the basis of their spectral data. All the compounds were tested in vitro for their antimicrobial activity and cell cytotoxicity. All the tested compounds (2b-k) and (3a-k) were shown to be better activity against Staphylococcus aureus than the standard Ciprofloxacin. The compound (3k) (R = 6-OMe) was found to be more potent cytotoxic than the standard 5-fluorouracil.

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An Ultrasound Mediated Green Synthesis of Benzimidazolylthiounsaturatednitriles Using Water as a Green Solvent (2014)

Sadhu Srinivas Rao, Chittireddy Venkata Ramana Reddy, and Pramod Kumar Dubey

Hindawi

In: Organic Chemistry International

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Publication Date: 2014-11-10

Description: Reaction of 2-cyanothiomethylbenzimidazole 1 with an aromatic aldehydes in water under ultrasonic irradiation for 10–13 min gave the corresponding unsaturated nitriles 2a–h which is an efficient and simple method under green conditions. The unsaturated nitrile derivatives were obtained in 86–98% yield with a short reaction time without any tedious workup procedures.

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Stereoselective Synthesis of (+)--Conhydrine from R-(+)-Glyceraldehyde (2014)

Nageshwar Rao Penumati and Nagaiah Kommu

Hindawi

In: Organic Chemistry International

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Publication Date: 2014-10-21

Description: Stereoselective synthesis of (+)-α-Conhydrine was accomplished from protected (R)-(+)-glyceraldehyde, a familiar carbohydrate predecessor. Our synthetic strategy featured the following two key reactions. One is Zn-mediated stereoselective aza-Barbier reaction of imine 6 with allyl bromide to afford chiral homoallylic amine 7, and the other is ring-closing metathesis.

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Synthesis, Characterization, and Evaluation for Antibacterial and Antifungal Activities of N-Heteroaryl Substituted Benzene Sulphonamides (2014)

Christiana Nonye Igwe and Uchechukwu Chris Okoro

Hindawi

In: Organic Chemistry International

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Publication Date: 2014-11-27

Description: The synthesis and biological activity of N-heteroaryl substituted benzene sulphonamides (3a–h) were successful. Simple condensation reaction of benzene sulphonyl chloride (1) with substituted heteroaromatic compounds (2a–h) under dry pyridine and acetone gave the target molecules (3a–h) in good to excellent yield. The compounds were characterized using FTIR, 1HNMR, and 13CNMR. The compounds were screened for antibacterial activity against E. coli, Salmonella typhi, P. aeruginosa, B. cereus, K. pneumonia, and Sarcina lutea and antifungal activity against C. albicans and A. niger. The results of the antimicrobial activity showed improved biological activity against some tested organisms.

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