Royal Society of Chemistry

Asymmetric organocatalytic desymmetrization of 4,4-disubstituted cyclohexadienones at high pressure: a new powerful strategy for the synthesis of highly congested chiral cyclohexenones

Org. and Biomol. Chem. - 23 July, 2014 - 09:54

Org. Biomol. Chem., 2014, 12,5847-5855
DOI: 10.1039/C4OB00733F, PaperNaomu Miyamae, Naruhisa Watanabe, Maya Moritaka, Keiji Nakano, Yoshiyasu Ichikawa, Hiyoshizo Kotsuki
A highly diastereoselective and enantioselective method for the asymmetric desymmetrization of 4,4-disubstituted cyclohexadienones at high pressure was developed.
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A powerful combination: recent achievements on using TBAI and TBHP as oxidation system

Org. and Biomol. Chem. - 23 July, 2014 - 09:54

Org. Biomol. Chem., 2014, 12,5807-5817
DOI: 10.1039/C4OB00276H, Review ArticleXiao-Feng Wu, Jin-Long Gong, Xinxin Qi
Recent achievements in the use of TBAI and TBHP as an oxidation system have been summarized and discussed.
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Recent advances in trifluoromethylation of organic compounds using Umemoto's reagents

Org. and Biomol. Chem. - 23 July, 2014 - 09:54

Org. Biomol. Chem., 2014, Advance Article
DOI: 10.1039/C4OB00671B, Review ArticleCai Zhang
This review highlights recent developments in the direct introduction of a trifluoromethyl group into organic compounds with Umemoto's reagents.
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A self-replicating peptide nucleic acid

Org. and Biomol. Chem. - 23 July, 2014 - 09:54
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB01168F, PaperTobias A. Ploger, Gunter von Kiedrowski
While the non-enzymatic ligation and template-directed synthesis of peptide nucleic acids (PNA) were reported since 1995 a case of self-replication of PNA has not been achieved yet. Here, we present...
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Folded alkyl chains in water-soluble capsules and cavitands

Org. and Biomol. Chem. - 23 July, 2014 - 09:54
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB01032A, CommunicationJesse Gavette, Kang-Da Zhang, Dariush Ajami, Julius Rebek
A deep cavitand with ionic "feet" dimerizes around hydrophobic compounds in D2O. Longer n-alkane guests, C14-C18, are encapsulated in contorted conformations and NMR is used to deduce their shapes. Competition...
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Relative contractile motion of the rings in a switchable palindromic [3]rotaxane in aqueous solution driven by radical-pairing interactions

Org. and Biomol. Chem. - 23 July, 2014 - 09:54

Org. Biomol. Chem., 2014, Advance Article
DOI: 10.1039/C4OB01228C, CommunicationLeah S. Witus, Karel J. Hartlieb, Yuping Wang, Aleksandrs Prokofjevs, Marco Frasconi, Jonathan C. Barnes, Edward J. Dale, Albert C. Fahrenbach, J. Fraser Stoddart
This communication describes a mechanically interlocked molecule (MIM), capable of switchable and reversible linear molecular motion.
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Formal synthesis of (+)-3-epi-eupomatilone-6 and the 3,5-bis-epimer

Org. and Biomol. Chem. - 23 July, 2014 - 09:54
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB01078G, PaperSariya Yodwaree, Darunee Soorukram, Chutima Kuhakarn, Patoomratana Tuchinda, Vichai Reutrakul, Manat Pohmakotr
The formal synthesis of (+)-3-epi-eupomatilone-6 (1) and the 3,5-bis-epimer (2) was accomplished. The key synthetic strategy involved the stereoselective construction of (3R,4S,5R)- and (3R,4S,5S)-trisubstituted [gamma]-butyrolactones 3 and 4 from (2R,3R)-2,3-dimethyl-4-pentenoic...
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Ligand free MCR for linking quinoxaline framework with benzimidazole nucleus: A new strategy for the identification of novel hybrid molecules as potential inducers of apoptosis

Org. and Biomol. Chem. - 23 July, 2014 - 09:54
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB01268B, CommunicationRajnikanth Sunke, P. Vijaya Babu, Swapna Yellanki, Raghavender Medisetti, Pushkar Kulkarni, Manojit Pal
We report a true MCR involving the reaction of N-(prop-2-ynyl)quinoxalin-2-amine derivative with 2-iodoanilines and tosyl azide in the presence of 10 mol% of CuI and Et3N in DMSO to afford...
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Novel EDTA-Ligands Containing an Integral Perylene Bisimide (PBI) Core as Optical Reporter Unit

Org. and Biomol. Chem. - 23 July, 2014 - 09:54
Org. Biomol. Chem., 2014, Accepted Manuscript
DOI: 10.1039/C4OB01007H, PaperMario Marcia, Prabhpreet Singh, Frank Hauke, Michele Maggini, Andreas Hirsch
The synthesis, characterization and metal complexation of a new class of perylene bisimides (PBIs) being an integral part of ethylenediaminetetraacetic acid (EDTA) - is reported. The simplest representative, namely derivative...
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Enhanced catalysis and enantioselective resolution of racemic naproxen methyl ester by lipase encapsulated within iron oxide nanoparticles coated with calix[8]arene valeric acid complexes

Org. and Biomol. Chem. - 23 July, 2014 - 09:54

Org. Biomol. Chem., 2014, Advance Article
DOI: 10.1039/C4OB01048E, PaperSerkan Sayin, Enise Akoz, Mustafa Yilmaz
In this study, two types of nanoparticles have been used as additives for the encapsulation of Candida rugosa lipase via the sol-gel method.
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C-H arylation of azaheterocycles: a direct ligand-free and Cu-catalyzed approach using diaryliodonium salts

Org. and Biomol. Chem. - 23 July, 2014 - 09:54

Org. Biomol. Chem., 2014, Advance Article
DOI: 10.1039/C4OB01061B, CommunicationDalip Kumar, Meenakshi Pilania, V. Arun, Savita Pooniya
An efficient and high yielding Cu-catalyzed direct C-H arylation of oxadiazoles, thiadiazoles, benzoxazoles and benzothiazoles has been achieved by employing easily accessible diaryliodonium salts.
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P,N,N-Pincer nickel-catalyzed cross-coupling of aryl fluorides and chlorides

Org. and Biomol. Chem. - 23 July, 2014 - 09:54

Org. Biomol. Chem., 2014, Advance Article
DOI: 10.1039/C4OB01041H, PaperDan Wu, Zhong-Xia Wang
P,N,N-Pincer nickel was demonstrated to effectively catalyze cross-coupling of aryl fluorides and chlorides with aryl magnesium or zinc reagents.
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A "click" chemistry constructed affinity system for 2-oxoglutaric acid receptors and binding proteins

Org. and Biomol. Chem. - 23 July, 2014 - 09:54

Org. Biomol. Chem., 2014, Advance Article
DOI: 10.1039/C4OB01005A, PaperYang Wang, Zeinab Assaf, Xinjun Liu, Fabio Ziarelli, Amel Latifi, Otmane Lamrabet, Gilles Quelever, Fanqi Qu, Cheng-Cai Zhang, Ling Peng
An ingenious and robust affinity resin to capture the 2-oxoglutaric acid binding proteins was constructed via "click" chemistry and validated using a known 2-OG receptor in cell lysate.
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Facile access to amides and hydroxamic acids directly from nitroarenes

Org. and Biomol. Chem. - 23 July, 2014 - 09:54

Org. Biomol. Chem., 2014, Advance Article
DOI: 10.1039/C4OB01155D, PaperShreyans K. Jain, K. A. Aravinda Kumar, Sandip B. Bharate, Ram A. Vishwakarma
Herein, we report a new method for synthesis of amides and hydroxamic acids directly from nitroarenes and aldehydes.
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Synthesis and properties of oligonucleotides modified with 2[prime or minute]-O-(2-carboxyethyl)nucleotides and their carbamoyl derivatives

Org. and Biomol. Chem. - 23 July, 2014 - 09:54

Org. Biomol. Chem., 2014, Advance Article
DOI: 10.1039/C4OB01260G, PaperTakeshi Yamada, Yoshiaki Masaki, Natsuki Okaniwa, Takashi Kanamori, Akihiro Ohkubo, Hirosuke Tsunoda, Kohji Seio, Mitsuo Sekine
2[prime or minute]-O-Methyl oligoribonucleotides with four kinds of 2[prime or minute]-O-modified uridine derivatives were synthesised.
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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. - 23 July, 2014 - 09:54

Org. Biomol. Chem., 2014, Advance Article
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. - 23 July, 2014 - 09:54

Org. Biomol. Chem., 2014, Advance Article
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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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. - 23 July, 2014 - 09:54

Org. Biomol. Chem., 2014, Advance Article
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. - 23 July, 2014 - 09:54

Org. Biomol. Chem., 2014, Advance Article
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 via L-tert-leucine-derived-squaramide catalyzed conjugate addition of nitrosulfones to acrylates and acrylamides

Org. and Biomol. Chem. - 23 July, 2014 - 09:54

Org. Biomol. Chem., 2014, Advance Article
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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