Royal Society of Chemistry

An air-stable cationic iridium hydride as a highly active and general catalyst for the isomerization of terminal epoxides

Chem. Commun. - 17 August, 2014 - 20:54

Chem. Commun., 2014, 50,10592-10595
DOI: 10.1039/C4CC05260A, CommunicationNicolas Humbert, Devendra J. Vyas, Celine Besnard, Clement Mazet
We describe the use of an air-stable iridium hydride catalyst for the isomerization of terminal epoxides into aldehydes with perfect regioselectivity.
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A divalent heteroleptic lanthanoid fluoride complex stabilised by the tetraphenylcyclopentadienyl ligand, arising from C-F activation of pentafluorobenzene

Chem. Commun. - 17 August, 2014 - 20:54

Chem. Commun., 2014, 50,10655-10657
DOI: 10.1039/C4CC04427D, CommunicationG. B. Deacon, F. Jaroschik, P. C. Junk, R. P. Kelly
The divalent heteroleptic lanthanoid fluoride complex, [Yb(C5Ph4H)([small mu ]-F)(thf)2]2, as well as [Yb(C5Ph4H)2(thf)] and [Yb(C5Ph4H)(C6F5)(thf)2] were obtained from reactions of ytterbium metal with Hg(C6F5)2 and tetraphenyl-cyclopentadiene under different conditions.
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Positive supercoiling affiliated with nucleosome formation repairs non-B DNA structures

Chem. Commun. - 17 August, 2014 - 20:54

Chem. Commun., 2014, 50,10641-10644
DOI: 10.1039/C4CC04789C, CommunicationDawei Li, Bei Lv, Hao Zhang, Jasmine Yiqin Lee, Tianhu Li
It is demonstrated that positive supercoiling affiliated with nucleosome formation can act as the driving force to repair the G-quadruplex, cruciform as well as a stable non-B DNA structure caused by peptide nucleic acid.
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A lithiomethyl trimethylammonium reagent as a methylene donor

Chem. Commun. - 17 August, 2014 - 20:54

Chem. Commun., 2014, 50,10604-10607
DOI: 10.1039/C4CC04579C, CommunicationTim den Hartog, Juan M. Sarria Toro, Erik P. A. Couzijn, Peter Chen
A soluble analogue of Wittig's lithiomethyl trimethylammonium reagent has been prepared, studied, and used as efficient methylene donor.
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Bicomponent hydrogen-bonded nanostructures formed by two complementary molecular Landers on Au(111)

Chem. Commun. - 17 August, 2014 - 20:54

Chem. Commun., 2014, 50,10619-10621
DOI: 10.1039/C4CC03550J, CommunicationN. Kalashnyk, M. Yu, R. Barattin, Y. Benjalal, M. Hliwa, C. Joachim, E. Laegsgaard, F. Besenbacher, A. Gourdon, X. Bouju, T. R. Linderoth
One- and two-dimensional structures formed by two Lander molecules on Au(111) via 3D-optimized or complementary triple H-bonding are studied by scanning tunneling microscopy and rationalized by numerical calculations.
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Fullerene derivatives with increased dielectric constants

Chem. Commun. - 17 August, 2014 - 20:54

Chem. Commun., 2014, 50,10645-10647
DOI: 10.1039/C4CC04366A, CommunicationFatemeh Jahani, Solmaz Torabi, Ryan C. Chiechi, L. Jan Anton Koster, Jan C. Hummelen
The dielectric constant of fullerene derivatives is increased through covalent modification and without deleterious effects on other properties.
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PCR quantification of SiO2 particle uptake in cells in the ppb and ppm range via silica encapsulated DNA barcodes

Chem. Commun. - 17 August, 2014 - 20:54

Chem. Commun., 2014, 50,10707-10709
DOI: 10.1039/C4CC04480K, CommunicationMarcus Hoop, Daniela Paunescu, Philipp R. Stoessel, Fritz Eichenseher, Wendelin J. Stark, Robert N. Grass
The cellular uptake of silica nanoparticles loaded with a DNA barcode can be detected at a 10 fg per cell level utilizing qPCR analytics.
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Smart dual-functional warhead for folate receptor-specific activatable imaging and photodynamic therapy

Chem. Commun. - 17 August, 2014 - 20:54

Chem. Commun., 2014, 50,10600-10603
DOI: 10.1039/C4CC04166F, CommunicationJisu Kim, Ching-Hsuan Tung, Yongdoo Choi
Folic acid as a bi-functional warhead to develop smart dual-targeted theranostic agents.
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Gold-catalyzed intermolecular oxidation of o-alkynylbiaryls: an easy and practical access to functionalized fluorenes

Chem. Commun. - 17 August, 2014 - 20:54

Chem. Commun., 2014, 50,10726-10729
DOI: 10.1039/C4CC05115G, CommunicationFei Pan, Shuang Liu, Chao Shu, Rong-Kun Lin, Yong-Fei Yu, Jin-Mei Zhou, Long-Wu Ye
A novel gold-catalyzed intermolecular oxidation of o-alkynylbiaryls has been developed. A variety of functionalized fluorenes are readily accessed by utilizing this non-diazo approach, thus providing a viable alternative to synthetically useful fluorenes.
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Live imaging of cellular dynamics using a multi-imaging vector in single cells

Chem. Commun. - 17 August, 2014 - 20:54

Chem. Commun., 2014, 50,10734-10736
DOI: 10.1039/C4CC04980B, CommunicationKyoungsook Park, Jinyoung Jeong, Bong Hyun Chung
A multi-imaging vector system based on 2A peptides is developed for real-time monitoring of cellular dynamics.
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Stereoselective [3+2] cycloaddition of N-tert-butanesulfinyl imines to arynes facilitated by a removable PhSO2CF2 group: synthesis and transformation of cyclic sulfoximines

Chem. Commun. - 17 August, 2014 - 20:54

Chem. Commun., 2014, 50,10596-10599
DOI: 10.1039/C4CC05042H, CommunicationWenchao Ye, Laijun Zhang, Chuanfa Ni, Jian Rong, Jinbo Hu
An unprecedented [3+2] cycloaddition between N-tert-butane sulfinyl imines and arynes provides a stereoselective method for the synthesis of cyclic sulfoximines.
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A lipophilic "fully-anti" dodecamer from a (5[prime or minute]S)-5[prime or minute],8-cyclo-2[prime or minute]-deoxyguanosine

Chem. Commun. - 17 August, 2014 - 20:54

Chem. Commun., 2014, 50,10722-10725
DOI: 10.1039/C4CC04275A, CommunicationSilvia Pieraccini, Michael A. Terzidis, Enrico J. Baldassarri, Giovanna Fragneto, Paolo Mariani, Stefano Masiero, Chryssostomos Chatgilialoglu
The self-assembly of a lipophilic derivative of mutagenic (5[prime or minute]S)-5[prime or minute],8-cyclo-2[prime or minute]-deoxyguanosine has been investigated by CD, NMR and SANS. The derivative forms a dodecameric G-quadruplex composed of three stacked fully-anti G-quartets.
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Sterically hindered malonamide monomers for the step growth synthesis of polyesters and polyamides

Chem. Commun. - 17 August, 2014 - 20:54

Chem. Commun., 2014, 50,10665-10668
DOI: 10.1039/C4CC03344B, CommunicationS. N. G. Tyler, R. L. Webster
Exploiting the ready cleavage of bulky amides in the presence of a simple nucleophile, a new monomer for step growth polymerisation has been realised. A range of novel polyesters and polyamides have been prepared under mild conditions that allow for efficient recycling and reuse of the amine by-product. The use of a Lewis acid to increase polyester molecular weight is also explored.
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An electron transfer series of octahedral chromium complexes containing a redox non-innocent [small alpha]-diimine ligand

Chem. Commun. - 17 August, 2014 - 20:54

Chem. Commun., 2014, 50,10626-10629
DOI: 10.1039/C4CC03332A, CommunicationJingmei Shen, Glenn P. A. Yap, William E. Barker IV, William E. Geiger, Klaus H. Theopold
An electron-transfer series of octahedral [small alpha]-diimine complexes [(HLCy)3Cr]n+(BARF)n (n = 2, 1, 0) has been synthesized and crystallographically characterized.
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Cyclopropanation of styrenes and stilbenes using lithiomethyl trimethylammonium triflate as methylene donor

Chem. Commun. - 17 August, 2014 - 20:54

Chem. Commun., 2014, 50,10608-10610
DOI: 10.1039/C4CC04929B, CommunicationJuan M. Sarria Toro, Tim den Hartog, Peter Chen
Soluble lithiomethyl trimethylammonium triflate can cyclopropanate styrenes and stilbenes efficiently. Kinetic experiments support a carbolithiation-ring closure mechanism.
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Pd-Catalyzed [3+2] cycloaddition of ketoimines with alkynes via directed sp3 C-H bond activation

Chem. Commun. - 17 August, 2014 - 20:54

Chem. Commun., 2014, 50,10699-10702
DOI: 10.1039/C4CC04676E, CommunicationYing Xie, Tengfei Chen, Shaomin Fu, Xing-Shu Li, Yuanfu Deng, Huanfeng Jiang, Wei Zeng
The palladium-catalyzed oxidative [3+2] cycloaddition of ketoimines with alkynes provided an efficient access to multisubstituted pyrroles via Csp3-H activation.
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Room-temperature palladium-catalyzed direct 2-arylation of benzoxazoles with aryl and heteroaryl bromides

Chem. Commun. - 17 August, 2014 - 20:54

Chem. Commun., 2014, 50,10661-10664
DOI: 10.1039/C4CC05307A, CommunicationFeng Gao, Byeong-Seon Kim, Patrick J. Walsh
The first room-temperature direct 2-arylation of benzoxazoles with aryl bromides by a Pd(OAc)2/NiXantphos-based catalyst is reported.
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Dehydromethylation of alkali metal salts of the utility amide 2,2,6,6-tetramethylpiperidide (TMP)

Chem. Commun. - 17 August, 2014 - 20:54

Chem. Commun., 2014, 50,10588-10591
DOI: 10.1039/C4CC04959D, CommunicationAlan R. Kennedy, Sarah M. Leenhouts, John J. Liggat, Antonio J. Martinez-Martinez, Kimberley Miller, Robert E. Mulvey, Charles T. O'Hara, Philip O'Keefe, Alan Steven
Heating alkali metal TMP compounds to reflux in hydrocarbon solution releases methane to generate novel aza-allyl derivatives.
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A highly sensitive surface plasmon resonance sensor for the detection of DNA and cancer cells by a target-triggered multiple signal amplification strategy

Chem. Commun. - 17 August, 2014 - 20:54

Chem. Commun., 2014, 50,10718-10721
DOI: 10.1039/C4CC04776A, CommunicationPeng He, Wenping Qiao, Lijun Liu, Shusheng Zhang
A SPR bioassay was developed for the detection of DNA and Ramos cells by combining the target-triggered isothermal exponential amplification with MNP-based RCA.
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Highly sensitive methyltransferase activity assay and inhibitor screening based on fluorescence quenching of graphene oxide integrated with the site-specific cleavage of restriction endonuclease

Chem. Commun. - 17 August, 2014 - 20:54

Chem. Commun., 2014, 50,10691-10694
DOI: 10.1039/C4CC04428B, CommunicationLijuan Ji, Zhewei Cai, Yingdan Qian, Ping Wu, Hui Zhang, Chenxin Cai
A sensitive and selective approach for the DNA methyltransferase activity assay and MTase inhibitor screening is reported.
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