Org. and Biomol. Chem.

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B-DNA structure and stability: the role of hydrogen bonding, [small pi]-[small pi] stacking interactions, twist-angle, and solvation

17 June, 2014 - 01:17

Org. Biomol. Chem., 2014, 12,4691-4700
DOI: 10.1039/C4OB00427B, PaperJordi Poater, Marcel Swart, F. Matthias Bickelhaupt, Celia Fonseca Guerra
Insight into structure and stability of B-DNA is obtained through systematic quantum chemical analyses of the roles played by hydrogen bonding, [small pi]-[small pi] stacking, solvation, and twist-angle.
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A two-step tandem reaction to prepare hydroxamic acids directly from alcohols

17 June, 2014 - 01:17

Org. Biomol. Chem., 2014, 12,4582-4585
DOI: 10.1039/C4OB00693C, CommunicationGiovanna Dettori, Silvia Gaspa, Andrea Porcheddu, Lidia De Luca
The first synthesis of hydroxamic acids from alcohols has been developed.
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19F NMR monitoring of the eukaryotic 20S proteasome chymotrypsin-like activity: an investigative tool for studying allosteric regulation

17 June, 2014 - 01:17

Org. Biomol. Chem., 2014, 12,4576-4581
DOI: 10.1039/C4OB00962B, CommunicationM. Keita, J. Kaffy, C. Troufflard, E. Morvan, B. Crousse, S. Ongeri
A novel bimodal fluorescent and fluorinated substrate of the chymotrypsin-like proteolytic activity has been developed.
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TEMPO-mediated allylic C-H amination with hydrazones

17 June, 2014 - 01:17

Org. Biomol. Chem., 2014, 12,4567-4570
DOI: 10.1039/C4OB00839A, CommunicationXu Zhu, Shunsuke Chiba
TEMPO-mediated reactions of alkenyl hydrazones afforded azaheterocycles via sp3 C-H allylic amination. The transformation is featured by a sequence of remote allylic H-radical shift and allylic homolytic substitution with hydrazone radicals.
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Dammarane-type triterpenoids as 11[small beta]-HSD1 inhibitors from Homonoia riparia

17 June, 2014 - 01:17

Org. Biomol. Chem., 2014, 12,4716-4722
DOI: 10.1039/C4OB00807C, PaperJin-Hai Yu, Yu Shen, Hong-Bing Liu, Ying Leng, Hua Zhang, Jian-Min Yue
The chemistry and bioactivity of a series of dammarane-type triterpenoids from Homonoia riparia were reported in this article.
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The syntheses of [small alpha]-ketoamides vianBu4NI-catalyzed multiple sp3C-H bond oxidation of ethylarenes and sequential coupling with dialkylformamides

17 June, 2014 - 01:17

Org. Biomol. Chem., 2014, 12,4586-4589
DOI: 10.1039/C4OB00520A, CommunicationBingnan Du, Bo Jin, Peipei Sun
The nBu4NI-catalyzed sequential C-O and C-N bond formation via multiple sp3C-H bond activation of ethylarenes, using N,N-dialkylformamide as the amino source, provided [small alpha]-ketoamides with moderate yields.
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Mimicking the 2-oxoglutaric acid signalling function using molecular probes: insights from structural and functional investigations

17 June, 2014 - 01:17

Org. Biomol. Chem., 2014, 12,4723-4729
DOI: 10.1039/C4OB00630E, PaperYang Wang, Xinjun Liu, Erik Laurini, Paola Posocco, Fabio Ziarelli, Maurizio Fermeglia, Fanqi Qu, Sabrina Pricl, Cheng-Cai Zhang, Ling Peng
2-Oxoglutaric acid (2-OG) has gained considerable attention because of its newly discovered signalling role in addition to its established metabolic functions.
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Direct arylation as a versatile tool towards thiazolo[5,4-d]thiazole-based semiconducting materials

17 June, 2014 - 01:17

Org. Biomol. Chem., 2014, 12,4663-4672
DOI: 10.1039/C4OB00360H, PaperJulija Kudrjasova, Roald Herckens, Huguette Penxten, Peter Adriaensens, Laurence Lutsen, Dirk Vanderzande, Wouter Maes
A variety of thiazolo[5,4-d]thiazole-based organic optoelectronic materials is synthesized via a straightforward Pd-catalyzed C-H arylation protocol.
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Pd(II)-catalyzed ligand controlled synthesis of methyl 1-benzyl-1H-indole-3-carboxylates and bis(1-benzyl-1H-indol-3-yl)methanones

17 June, 2014 - 01:17

Org. Biomol. Chem., 2014, 12,4602-4609
DOI: 10.1039/C4OB00714J, PaperRong Shen, Taichi Kusakabe, Keisuke Takahashi, Keisuke Kato
A simple change of ligand and solvent allows controlled, effective switching between cyclization-carbonylation and cyclization-carbonylation-cyclization-coupling (CCC-coupling) reactions.
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A novel SWCNT platform bearing DOTA and [small beta]-cyclodextrin units. "One shot" multidecoration under microwave irradiation

17 June, 2014 - 01:17

Org. Biomol. Chem., 2014, 12,4708-4715
DOI: 10.1039/C4OB00611A, PaperE. Calcio Gaudino, S. Tagliapietra, K. Martina, A. Barge, M. Lolli, E. Terreno, D. Lembo, G. Cravotto
The functionalization of single-walled carbon nanotubes (SWCNTs) via microwave-assisted grafting reactions enables efficient multidecoration in a single step.
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Alkyl chain substituted 1,9-pyrazoloanthrones exhibit prominent inhibitory effect on c-Jun N-terminal kinase (JNK)

17 June, 2014 - 01:17

Org. Biomol. Chem., 2014, 12,4656-4662
DOI: 10.1039/C4OB00548A, PaperKarothu Durga Prasad, Jamma Trinath, Ansuman Biswas, Kanagaraj Sekar, Kithiganahalli N. Balaji, Tayur N. Guru Row
N-Alkyl substituted pyrazoloanthrone derivatives were synthesized, characterized and tested for their in vitro inhibitory activity over c-Jun N-terminal kinase (JNK) in regulating inflammation associated disorders.
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A coumarin-quinolinium-based fluorescent probe for ratiometric sensing of sulfite in living cells

17 June, 2014 - 01:17

Org. Biomol. Chem., 2014, 12,4637-4643
DOI: 10.1039/C4OB00132J, PaperLi Tan, Weiying Lin, Sasa Zhu, Lin Yuan, Kaibo Zheng
Based on a novel coumarin-quinolinium platform, compound 2 was rationally designed and synthesized as a novel ratiometric fluorescent sensor for sulfite anions.
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Utilization of whole cell mediated deracemization in a chemoenzymatic synthesis of enantiomerically enriched polycyclic chromeno[4,3-b] pyrrolidines

17 June, 2014 - 01:17

Org. Biomol. Chem., 2014, 12,4682-4690
DOI: 10.1039/C4OB00615A, PaperThangavelu Saravanan, Sushital Jana, Anju Chadha
Enantiomerically enriched pyrrolidines via chemoenzymatic synthesis.
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Synthesis of 2-C-substituted benzothiazoles via a copper-promoted domino condensation/S-arylation/heterocyclization process

17 June, 2014 - 01:17

Org. Biomol. Chem., 2014, 12,4633-4636
DOI: 10.1039/C4OB00564C, PaperHaoyue Xiang, Jin Qi, Qian He, Min Jiang, Chunhao Yang, Lianfu Deng
Two series of extremely useful 2-C-substituted benzothiazoles containing gem-bisphosphonates and aryl-substituted nitriles were synthesized here via a copper-promoted domino condensation/S-arylation/heterocyclization process.
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DABCO-mediated isocyanide-based multicomponent reaction: synthesis of highly substituted cyclopentenes

17 June, 2014 - 01:17

Org. Biomol. Chem., 2014, 12,4628-4632
DOI: 10.1039/C4OB00012A, PaperLi-Rong Wen, Ming-Chao Lan, Wen-Kui Yuan, Ming Li
Highly substituted cyclopentenes can be accessed rapidly from isocyanides, aldehydes and malononitrile or ethyl cyanoacetate (AB2C2) using DABCO as a catalyst under solvent-free conditions at 40 [degree]C within 30 min.
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Highly efficient and generalized asymmetric synthesis of quaternary stereogenic carbon-containing [small beta]-amino indanones/indanoles via Mannich-type additions between 1-indanones and N-tert-butanesulfinylketimines

17 June, 2014 - 01:17

Org. Biomol. Chem., 2014, 12,4620-4627
DOI: 10.1039/C4OB00489B, PaperLingmin Wu, Chen Xie, Haibo Mei, Vadim A. Soloshonok, Jianlin Han, Yi Pan
1-Indanone and acetophenone derived enolates undergo Mannich-type reactions with ketimines in up to 98% yields and >99 : 1 diastereoselectivities.
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Chiral Bronsted acid catalyzed enantioselective intermolecular allylic aminations

17 June, 2014 - 01:17

Org. Biomol. Chem., 2014, 12,4590-4593
DOI: 10.1039/C4OB00526K, CommunicationMinyang Zhuang, Haifeng Du
Bronsted acid-catalyzed asymmetric intermolecular amination of allylic alcohols was first achieved with moderate to high levels of reactivities and selectivities.
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Recent development of two-photon fluorescent probes for bioimaging

17 June, 2014 - 01:17

Org. Biomol. Chem., 2014, 12,4550-4566
DOI: 10.1039/C4OB00431K, Review ArticleDokyoung Kim, Hye Gun Ryu, Kyo Han Ahn
Fluorescent probes are essential tools for studying biological systems.
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Synthesis of 1-amino-2-aroyl/acetylnaphthalenes through a base mediated one pot inter and intramolecular C-C bond formation strategy

17 June, 2014 - 01:17

Org. Biomol. Chem., 2014, 12,4730-4737
DOI: 10.1039/C4OB00432A, PaperSurjeet Singh, Pratik Yadav, Satya Narayan Sahu, Ismail Althagafi, Abhinav Kumar, Brijesh Kumar, Vishnu Ji Ram, Ramendra Pratap
Base mediated synthesis of highly functionalized aroyl/acetylnaphthalenes by the reaction of 2-(1-cyano-2,2-bis(methylthio)vinyl)benzonitrile and aryl methyl ketone or acetone has been reported.
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Interaction of amphiphilic [small alpha]-helical cell-penetrating peptides with heparan sulfate

17 June, 2014 - 01:17

Org. Biomol. Chem., 2014, 12,4673-4681
DOI: 10.1039/C4OB00673A, PaperJi Yang, Hiroshi Tsutsumi, Tadaomi Furuta, Minoru Sakurai, Hisakazu Mihara
The binding of cell-penetrating peptides to heparan sulfate is investigated experimentally and computationally.
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