Royal Society of Chemistry

Multicomponent reaction of chalcones, malononitrile and DMF leading to [gamma]-ketoamides

Org. and Biomol. Chem. - 10 August, 2014 - 14:54

Org. Biomol. Chem., 2014, 12,6389-6392
DOI: 10.1039/C4OB00971A, PaperEnxiang Wei, Bing Liu, Shaoxia Lin, Fushun Liang
An efficient synthesis of [gamma]-ketoamides was developed by the one-pot multicomponent reaction of chalcones, malononitrile and DMF (as both the reactant and solvent) in the presence of NaOH (3.0 equiv.). The reaction features high atom economy, easily available starting materials, operational simplicity, and good tolerance with diverse functional groups.
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Tautomerisation of thymine acts against the Huckel 4N + 2 rule. The effect of metal ions and H-bond complexations on the electronic structure of thymine

Org. and Biomol. Chem. - 10 August, 2014 - 14:54

Org. Biomol. Chem., 2014, 12,6476-6483
DOI: 10.1039/C4OB00964A, PaperOlga A. Stasyuk, Halina Szatylowicz, Tadeusz M. Krygowski
Not necessarily the [small pi]-electron delocalization is responsible for the stability of thymine tautomers.
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Rational design of a new fluorescent 'ON/OFF' xanthene dye for phosphate detection in live cells

Org. and Biomol. Chem. - 10 August, 2014 - 14:54

Org. Biomol. Chem., 2014, 12,6432-6439
DOI: 10.1039/C4OB00951G, PaperA. Martinez-Peragon, D. Miguel, A. Orte, A. J. Mota, M. J. Ruedas-Rama, J. Justicia, J. M. Alvarez-Pez, J. M. Cuerva, L. Crovetto
A new fluorescein derivative with ON/OFF features, 9-[1-(4-tert-butyl-2-methoxyphenyl)]-6-hydroxy-3H-xanthen-3-one (Granada Green, GG), was designed and synthesised.
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Cu2O Template Synthesis of High-Performance PtCu Alloy Yolk-Shell Cube Catalysts for Direct Methanol Fuel Cells

Chem. Commun. - 9 August, 2014 - 18:54
Chem. Commun., 2014, Accepted Manuscript
DOI: 10.1039/C4CC04108A, CommunicationSheng-Hua Ye, Xu-Jun He, Liang-Xin Ding, Zheng-Wei Pan, Ye-Xiang Tong, mingmei Wu, Gao-Ren Li
Cu2O yolk-shell cubes are firstly fabricated via combining ZnO-assisted electrodeposition with Ostwald ripening and their formation mechanism is studied. Then novel PtCu alloy yolk-shell cubes were fabricated via the disproportionation...
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From historic review to horizon beyond: Lithium-Sulphur batteries run on the wheels

Chem. Commun. - 9 August, 2014 - 18:54
Chem. Commun., 2014, Accepted Manuscript
DOI: 10.1039/C4CC05109B, Feature ArticleRenjie Chen, Teng Zhao, Feng Wu
In terms of sustainable development and environmental issues, design and fabrication of efficient energy storage device will be more critical in the future than at any time in the past....
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An efficient, Schiff-base derivative for selective fluorescence sensing of Zn2+ ions: quantum chemical calculation appended by real sample application and cell imaging study

Org. and Biomol. Chem. - 8 August, 2014 - 14:17

Org. Biomol. Chem., 2014, 12,6447-6456
DOI: 10.1039/C4OB00732H, PaperSayantani Chall, Soumya Sundar Mati, Saugata Konar, Dipti Singharoy, Subhash Chandra Bhattacharya
Fluorescence based sensitive detection of the second most abundant metal ion (Zn2+) was established using a newly synthesized Schiff-base ligand, PyHP.
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Enantioselective synthesis of [small alpha],[small alpha]-difluoro-[small beta]-lactams using amino alcohol ligands

Org. and Biomol. Chem. - 8 August, 2014 - 14:17

Org. Biomol. Chem., 2014, 12,6484-6489
DOI: 10.1039/C4OB01184H, PaperAtsushi Tarui, Takeshi Ikebata, Kazuyuki Sato, Masaaki Omote, Akira Ando
A practical and highly enantioselective Reformatsky reaction of ethyl bromodifluoroacetate with imines using a cheap and commercially available amino alcohol ligand is described.
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Enantioselective synthesis of [gamma]-tetrasubstituted nitrosulfonyl carboxylates and amides viaL-tert-leucine-derived-squaramide catalyzed conjugate addition of nitrosulfones to acrylates and acrylamides

Org. and Biomol. Chem. - 8 August, 2014 - 14:17

Org. Biomol. Chem., 2014, 12,6425-6431
DOI: 10.1039/C4OB00344F, PaperKalisankar Bera, Irishi N. N. Namboothiri
A t-leucine-derived squaramide catalyzed reaction of [small alpha]-nitrosulfones with acrylates/acrylamides provides [gamma]-tetrasubstituted [gamma]-nitro-[gamma]-sulfonyl carboxylates/amides in excellent yield and enantioselectivity.
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Encapsulation and Stabilization of Polyoxometalates in Self-Assembled Supramolecular Hydrogels

Dalton Transactions - 7 August, 2014 - 01:17
Dalton Trans., 2014, Accepted Manuscript
DOI: 10.1039/C4DT01372G, CommunicationVamangi M Pandya, Ulrich Kortz, Sachin Arun Joshi
We have encapsulated the polyoxoanions [P2W18O62]6- and [P2W15V3O62]9- in a self-assembled carboxy-methyl-chitosan (CMC) hydrogel, exhibiting a regular super-structure in water at physiological pH. We performed stability studies as a function...
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Electrochemical and theoretical analysis of the reactivity of shikonin derivatives: dissociative electron transfer in esterified compounds

Org. and Biomol. Chem. - 6 August, 2014 - 13:54

Org. Biomol. Chem., 2014, 12,6393-6398
DOI: 10.1039/C4OB01207K, PaperGeorgina Armendariz-Vidales, Carlos Frontana
Electrochemical and theoretical analysis of Shikonin derivatives revealed that for esterified compounds, a dissociative electron transfer process occurs.
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An unusual mulinane diterpenoid from the Chilean plant Azorella trifurcata (Gaertn) Pers

Org. and Biomol. Chem. - 6 August, 2014 - 13:54

Org. Biomol. Chem., 2014, 12,6406-6413
DOI: 10.1039/C4OB00966E, PaperCarlos Areche, Beatriz Sepulveda, Aurelio San Martin, Olimpo Garcia-Beltran, Mario Simirgiotis, Alvaro Canete
An unusual mulinane diterpenoid named 7[small alpha]-acetoxy-9-epi-13[small beta]-hydroxymulinane was isolated from A. trifurcate. This compound possesses a new trans-syn-trans arrangement in a tricyclic ring system not previously encountered in nature.
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Efficient asymmetric synthesis of N-protected-[small beta]-aryloxyamino acids via regioselective ring opening of serine sulfamidate carboxylic acid

Org. and Biomol. Chem. - 6 August, 2014 - 13:54

Org. Biomol. Chem., 2014, 12,6507-6515
DOI: 10.1039/C4OB01047G, PaperRajesh Malhotra, Tushar K. Dey, Swarup Dutta, Sourav Basu, Saumen Hajra
First regioselective ring opening of serine derived cyclic sulfamidate with ArONa is developed to provide an easy and direct access of a variety of N-Boc- and N-PMB protected [small beta]-aryloxy-[small alpha]-amino acids with complete retention of enantiopurity in moderate to high yields.
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Amino acid chirons: a tool for asymmetric synthesis of heterocycles

Org. and Biomol. Chem. - 6 August, 2014 - 13:54

Org. Biomol. Chem., 2014, 12,6297-6339
DOI: 10.1039/C4OB00943F, Review ArticlePriyanka Singh, Krishnananda Samanta, Sanjit Kumar Das, Gautam Panda
This review describes diverse asymmetric heterocycles with various membered rings (n = 3-9) for the period from 1996 to Dec. 2013.
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Aliphatic amine responsive organogel system based on a simple naphthalimide derivative

Org. and Biomol. Chem. - 6 August, 2014 - 13:54

Org. Biomol. Chem., 2014, 12,6399-6405
DOI: 10.1039/C4OB00728J, PaperXinhua Cao, Tingting Zhang, Aiping Gao, Keli Li, Qiuli Cheng, Lijuan Song, Min Zhang
Aliphatic amines and aromatic amines were distinguished and detected by an organogel system containing naphthalimide.
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A hydrophobic disordered peptide spontaneously anchors a covalently bound RNA hairpin to giant lipidic vesicles

Org. and Biomol. Chem. - 6 August, 2014 - 13:54

Org. Biomol. Chem., 2014, 12,6363-6373
DOI: 10.1039/C4OB00721B, PaperAlexandra Le Chevalier Isaad, Paolo Carrara, Pasquale Stano, Kollappillil S. Krishnakumar, Dominique Lafont, Alexandra Zamboulis, Rene Buchet, Denis Bouchu, Florian Albrieux, Peter Strazewski
Exergonic compartmentation of nucleic acids to liposomes through conjugation with peptides lends experimental support to early evolvable RNA-peptide 'collaboration'.
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Asymmetric synthesis of substituted NH-piperidines from chiral amines

Org. and Biomol. Chem. - 6 August, 2014 - 13:54

Org. Biomol. Chem., 2014, 12,6384-6388
DOI: 10.1039/C4OB00657G, PaperLekh Nath Gautam, Yijin Su, Novruz G. Akhmedov, Jeffrey L. Petersen, Xiaodong Shi
Previously, we reported an efficient asymmetric synthesis of substituted piperidines through an exocyclic chirality induced nitroalkene/amine/enone (NAE) condensation reaction.
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DFT study on the reaction mechanisms and stereoselectivities of NHC-catalyzed [2 + 2] cycloaddition between arylalkylketenes and electron-deficient benzaldehydes

Org. and Biomol. Chem. - 6 August, 2014 - 13:54

Org. Biomol. Chem., 2014, 12,6374-6383
DOI: 10.1039/C4OB00606B, PaperMengmeng Zhang, Donghui Wei, Yang Wang, Suiji Li, Jiefei Liu, Yanyan Zhu, Mingsheng Tang
Two possible mechanisms of ketene and aldehyde [2 + 2] cycloaddition catalyzed by NHC have been investigated using the DFT method.
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Mechanisms for CO oxidation on Fe(III)-OH-Pt interface: a DFT study

Faraday Disc. - 6 August, 2014 - 11:17
Faraday Discuss., 2014, Accepted Manuscript
DOI: 10.1039/C4FD00144C, PaperGang Fu, Nanfeng Zheng, Guangxu Chen, Yun Zhao
The full catalytic cycle that involves the oxidation of two CO molecules is investigated here by using periodic density functional calculation. To simulate the nature of Fe(OH)x/Pt nanoparticles, three possible...
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Guest-induced supramolecular chirality in a ditopic azoprobe-cyclodextrin complex in water

Chem. Commun. - 5 August, 2014 - 17:54

Chem. Commun., 2014, 50,10059-10061
DOI: 10.1039/C4CC04227A, CommunicationKentaro Nonaka, Mai Yamaguchi, Masashi Yasui, Shoji Fujiwara, Takeshi Hashimoto, Takashi Hayashita
The novel supramolecular sensors induced by the clockwise twisted structures due to multi-point recognition in water.
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Bio-specific and bio-orthogonal chemistries to switch-off the quencher of a FRET-based fluorescent probe: application to living-cell biothiol imaging

Chem. Commun. - 5 August, 2014 - 17:54

Chem. Commun., 2014, 50,10049-10051
DOI: 10.1039/C4CC03548H, CommunicationC. Egloff, S. A. Jacques, M. Nothisen, D. Weltin, C. Calligaro, M. Mosser, J.-S. Remy, A. Wagner
A quencher sensitive to both a biological metabolite (biothiols) and a bio-orthogonal reagent (dithionite) was developed.
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