Org. and Biomol. Chem.

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RSC - Org. Biomol. Chem. latest articles
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Contrasting anion recognition behaviour exhibited by halogen and hydrogen bonding rotaxane hosts

7 January, 2015 - 04:17
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB02547D, PaperStuart Philip Cornes, Charles Davies, David Blyghton, Mark Sambrook, P D Beer
A rotaxane host system containing a novel halogen bonding (XB) 5-iodo-1,2,3-triazole functionalised pyridinium motif, within its axle component, has been prepared via a ring closing metathesis reaction, using chloride as...
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Synthesis of a novel water-soluble cylindrical macrotricyclic host and its complexation with N-methylquinolinium and N-methylisoquinolinium salts: formation of 1:2 complexes in water

7 January, 2015 - 04:17
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB02533D, CommunicationFei Zeng, Chuan-Feng Chen
A novel water-soluble cylindrical macrotricyclic host containing one central cavity and two dibenzo-24-crown-8 lateral cavities was synthesized. It could form 1:2 complexes with N-methylquinolinium salts or N-methylisoquinolinium salts in water...
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Direct construction of 2-alkylbenzo-1,3-azoles via C-H activation of alkanes for C-C and C-X (X = O, S) bond formation

7 January, 2015 - 04:17
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB02488E, PaperArvind K. Yadav, L.D.S. Yadav
Copper catalyzed straightforward synthesis of 2-alkylbenzoxa(thia)azoles from aryl isocyanates/isothiocyanates and simple alkanes is reported. The protocol utilizes ditertiarybutylproxide (DTBP) as a radical initiator and involves sequential formation of C-C and...
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Ligand orientation in a membrane-embedded receptor site revealed by solid-state NMR with paramagnetic relaxation enhancement.

7 January, 2015 - 04:17
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB02427C, PaperChristopher Whittaker, Simon G. Patching, Mikael Esmann, David Middleton
NMR relaxation enhancement by paramagnetic metals provides powerful restraints on the three-dimensional structures of proteins in solution, and this approach has recently been utilized in several NMR structural investigations of...
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Sweetness and Light: Design and Applications of Photoswitchable Glycoconjugates.

7 January, 2015 - 04:17
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB02296C, Review Articleyingxue Hu, Rico Tabor, Brendan L. Wilkinson
Carbohydrate-protein binding is supramolecular recognition process that underpins myriad biological events. However, the precise conformational and configurational requirements for biomolecular recognition are often poorly understood, since such phenomena often occur...
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Synthesis of Novel Azole Fused-Quinazolines via One-pot Sequential Ullmann type Coupling and Intramolecular Dehydrogenative C-N Bonding

7 January, 2015 - 04:17
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB02375G, PaperNitesh k Nandwana, Kasiviswanadharaju Pericherla, Pinku Kaswan, Anil Kumar
An efficient one-pot sequential procedure has been described for the synthesis of novel azole fused quinazolines through Pd/Cu co-catalyzed Ullmann type coupling followed by cross dehydrogenative coupling of various azoles...
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Synthesis of 4-substituted oxazolo[4,5-c]quinolines by direct reaction at C-4 position of oxazole

7 January, 2015 - 04:17
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB02224F, PaperMahesh Akula, Yadagiri Thigulla, Connor Davis, Mukund Jha, Anupam Bhattacharya
A facile synthesis of 4-aryl substituted oxazolo[4,5-c]quinolines has been described via modified Pictet-Spengler method and using Cu(TFA)2 as a catalyst. The developed methodology directly functionalizes C-4 position of oxazoles without...
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LNA Units Present in (2'-OMe)-RNA Strand Stabilize Parallel Duplexes (2'-OMe)-RNA/[All-RP-PS]-DNA and Parallel Triplexes (2'-OMe)-RNA/[All-RP-PS]-DNA/RNA. An Improved Tool for Inhibition of Reverse Transcription.

7 January, 2015 - 04:17
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB02364A, PaperPiotr Guga, Anna Maciaszek, Agnieszka Krakowiak, Magdalena Janicka, Agnieszka Tomaszewska-Antczak, Milena Sobczak, Barbara Mikolajczyk
Homopurine phosphorothioate analogs of DNA, possessing all phosphorus atoms of RP configuration ([All-RP-PS]-DNA), when interact with appropriate complementary RNA or (2'-OMe)-RNA templates, form parallel triplexes or parallel duplexes of very...
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Halogenated Boron-Dipyrromethenes: Synthesis, Properties and Applications

7 January, 2015 - 04:17
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB02293A, Review ArticleMagalampalli Ravikanth, Lakshmi Vellanki, Rajeswara Rao M.
Boron-dipyrromethene dyes (BODIPYs) containing halogens at pyrrole carbons are very useful synthons for the synthesis of variety of BOIDPYs for a wide range of applications. Among the functional groups, halogens...
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Regulating Exocytosis of Nanoparticles via Host-Guest Chemistry

7 January, 2015 - 04:17
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB02433H, PaperChaekyu Kim, Gulen Tonga, Bo Yan, Chang Soo Kim, Sung Tae Kim, Myoung-Hwan Park, Zhengjiang Zhu, Bradley Duncan, Brian Creran, Vincent M Rotello
Prolonged retention of internalized nanoparticulate systems inside cells improves their efficacy in imaging, drug delivery, and theranostic applications. Especially, regulating exocytosis of the nanoparticles is a key factor in the...
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NBD-based Fluorescent Chemosensor for the Selective Quantification of Copper and Sulfide in Aqueous Solution and Living Cells

7 January, 2015 - 04:17
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB02178A, PaperQingtao Meng, Yu Shi, Cuiping Wang, Hongmin Jia, Xue Gao, Run Zhang, Yongfei Wang, Zhiqiang Zhang
Chemosensors play important roles in cations and anions recognition in biological, industrial, and environmental processes. Although much efforts have been made to develop artificial fluorescent receptors for Cu2+ and S2-,...
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Highly efficient synthesis of novel methyl 132-methylene mesopyropheophorbide a via pH-dependent regioselective condensation with formaldehyde and its stereoselective Michael addition reaction

7 January, 2015 - 04:17
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB02491E, CommunicationJiazhu Li, Yang Liu, Xi-Sen Xu, Yan-Long Li, Shan-Guo Zhang, IL YOON, Young Key Shim, Jin-Jun Wang, Jun-gang Yin
Treatment of methyl mesopyropheophorbide a with formaldehyde under basic condition gave a novel 132-methylene derivative in 85% yield; under acidic condition, the corresponding 20-hydroxymethyl derivative was obtained in 65% yield....
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Tandem Catalytic Oxidative Deacetylation of Acetoacetic Esters and Hetero Aromatic Cyclizations

7 January, 2015 - 04:17
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB02441A, PaperYeming Ju, Di Miao, Ruiyang Yu, Sangho Koo
One pot syntheses of furan, thiophene, and pyrrole were accomplished by oxidative deacetylation using Mn(III)/Co(II) catalysts and Paal-Knorr reaction from 1,5-dicarbonyl compounds, which are prepared from the conjugate addition of...
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Copper-Catalyzed Oxidative Alkenylation of Thioethers via Csp3-H Functionalization

7 January, 2015 - 04:17
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB02564D, CommunicationHao Cao, Dong Liu, Chao Liu, Xinquan Hu, Aiwen Lei
A novel copper-catalyzed oxidative alkenylation of thioethers via Csp3-H functionalization to construct allylic thioethers was first demonstrated. Different 1,1-disubstituted olefins could cross-couple with thioethers to generate the corresponding alkenylation products...
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Solvent- and Phase-Controlled Photochirogenesis. Enantiodifferentiating Photoisomerization of (Z)-Cyclooctene Sensitized by Cyclic Nigerosylnigerose-Based Nanosponges Crosslinked by Pyromellitate

7 January, 2015 - 04:17
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB02390K, PaperXueqin Wei, Wenting Liang, Wanhua Wu, Cheng Yang, fabrizio caldera, Francesco Trotta, Andrea Mele, Tomoyuki Nishimoto, Yoshihisa Inoue
Cyclic nigerosylnigerose (CNN), a saucer-shaped cyclic tetrasaccharide with a shallow concave, was reacted with pyromellitic dianhydride in 1:2 and 1:4 ratios to give two CNN-based polymers of different degrees of...
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Tuning Viscoelastic Properties of Supramolecular Peptide Gels via Dynamic Covalent Crosslinking

5 January, 2015 - 03:54
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB02217C, CommunicationAref Khalily, Melis Goktas, Mustafa O. Guler
Dynamic covalent crosslinking approach is used to crosslink supramolecular peptide gels. This novel approach facilitates tuning viscoelastic properties of the gel and enhances mechanical stability (storage modulus exceeding 105 Pa)...
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Phototriggerable peptidomimetics for the inhibition of Mycobacterium turberculosis ribonucleotide reductase by targeting protein-protein binding

5 January, 2015 - 03:54
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB01926A, PaperChristoffer Karlsson, Magnus Blom, Miranda Johansson, Anna M Jansson, Enzo Scifo, Anders Karlen, Thavendran Govender, Adolf Gogoll
Incorporation of an artificial amino acid 2 with a stilbene chromophore into peptidomimetics with three to nine amino acids yields phototriggerable candidates for inhibition of the binding between the R1...
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Vanadyl Species-Catalyzed, Complementary [small beta]-Oxidative Carbonylation of Styrene Derivatives with Aldehydes

5 January, 2015 - 03:54
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB02621G, PaperShiue-Shien Weng, Wen-Chieh Yang, Ananthan Ramasamy, Gobi Rajeshwaren, Yi-Ya Liao, Chien-Tien Chen
A series of oxometallic species and metal acetylacetonates (acac) was examined as catalysts for oxidative carbonylation of styrene with benzaldehyde by using t-butylhydroperoxide as co-oxidant in warm acetonitrile. Among them,...
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Preassembly-driven ratiometric sensing of H2PO4-anions in organic and aqueous environments

5 January, 2015 - 03:54
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB02498B, CommunicationWeitao Gong, Duo Na, Le Fang, Hassan Mehdi, Guiling Ning
Gemini surfactant-like receptor R1 is designed and synthesized. The special preassembly phenomenon of R1 in nonpolar solvent facilitate the novel ratiometric fluorescence sensing of H2PO4- via anion-induced reassembly process in...
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Palladium-Catalyzed Oxidative Deacetonative Coupling of 4-Aryl-2-methyl-3-butyn-2-ols with H-phosphonates

5 January, 2015 - 03:54
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB02410A, PaperXiang Li, Suyan Sun, Fan Yang, Jianxun Kang, Yusheng Wu, Yangjie Wu
An efficient and general applicable protocol for palladium-catalyzed oxidative deacetonative coupling of 4-aryl-2-methyl-3-butyn-2-ols with dialkyl H-phosphonates has been developed. This methodology provides a new and practical route to alkynylphosphonates using...
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