Royal Society of Chemistry

From meiogynin A to the synthesis of dual inhibitors of Bcl-xL and Mcl-1 anti-apoptotic proteins

Chem. Commun. - 10 July, 2014 - 11:17

Chem. Commun., 2014, 50,8593-8596
DOI: 10.1039/C4CC01830C, CommunicationS. Desrat, C. Remeur, C. Geny, G. Riviere, C. Colas, V. Dumontet, N. Birlirakis, B. I. Iorga, F. Roussi
The synthesis of one of the most potent pan inhibitors of the anti-apoptotic proteins Bcl-xL and Mcl-1 is reported. This analogue of a natural sesquiterpenoid dimer meiogynin A was elaborated by a convergent asymmetric synthesis with 36% yield in ten steps.
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Direct evidence by in situ IR CO monitoring of the formation and the surface segregation of a Pt-Sn alloy

Chem. Commun. - 10 July, 2014 - 11:17

Chem. Commun., 2014, 50,8590-8592
DOI: 10.1039/C4CC03208J, CommunicationAlina Moscu, Yves Schuurman, Laurent Veyre, Chloe Thieuleux, Frederic Meunier
The heat of CO adsorption on the Pt atoms of a Pt-Sn alloy phase could be determined by DRIFTS and found to be about half that measured on a plain Pt reference. Surprisingly, a reversible surface segregation of the Pt-Sn alloy was observed at temperatures below 175 [degree]C.
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Can silylenes rival transition metal systems in bond-strengthening [small pi]-back donation? A computational investigation

Chem. Commun. - 10 July, 2014 - 11:17

Chem. Commun., 2014, 50,8522-8525
DOI: 10.1039/C4CC02470B, CommunicationAmrita Pal, Kumar Vanka
Full quantum chemical calculations with density functional theory (DFT) show that bond-strengthening back-donation to a [small pi]-diborene, recently discovered for transition metal systems (Braunschweig and co-workers, Nat. Chem., 2013, 5, 115-121), would be just as favored for Main Group silylene complexes.
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Rational design of biotinylated probes: fluorescent turn-on detection of (strept)avidin and bioimaging in cancer cells

Chem. Commun. - 10 July, 2014 - 11:17

Chem. Commun., 2014, 50,8518-8521
DOI: 10.1039/C4CC03315A, CommunicationQian Sun, Junhong Qian, Haiyu Tian, Liping Duan, Weibing Zhang
Two fluorescent probes for (strept)avidin were synthesized. (Strept)avidin induced dramatical fluorescence changes in both probes. SPS2 has potential in fluorescent imaging of living tumor cells.
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Dual functionalization of porous aromatic frameworks as a new platform for heterogeneous cascade catalysis

Chem. Commun. - 10 July, 2014 - 11:17

Chem. Commun., 2014, 50,8507-8510
DOI: 10.1039/C4CC04012K, CommunicationYiming Zhang, Baiyan Li, Shengqian Ma
Dual functionalization of PAFs has been achieved by stepwise post-synthetic modification of PAF-1 with two antagonistic groups of strong acid and strong base, which catalyzes a series of cascade reactions and demonstrates superior chemical stability compared to mesoporous silica and MOF-based bifunctional solids.
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A copper(II) perchlorate-promoted tandem reaction of internal alkynol and salicyl N-tosylhydrazone: direct access to isochromeno[3,4-b]chromene

Chem. Commun. - 10 July, 2014 - 11:17

Chem. Commun., 2014, 50,8514-8517
DOI: 10.1039/C4CC02862G, CommunicationHai Xiao Siyang, Xu Rui Wu, Xiao Yue Ji, Xin Yan Wu, Pei Nian Liu
A copper(II) perchlorate-promoted tandem reaction of internal alkynol and salicyl N-tosylhydrazone provides a novel, concise method for constructing isochromeno[3,4-b]chromene in 35-94% yields.
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DNA adsorption by magnetic iron oxide nanoparticles and its application for arsenate detection

Chem. Commun. - 10 July, 2014 - 11:17

Chem. Commun., 2014, 50,8568-8570
DOI: 10.1039/C4CC03264K, CommunicationBiwu Liu, Juewen Liu
Arsenate strongly displaces fluorescently labeled DNA adsorbed on iron oxide nanoparticles, allowing sensitive and convenient arsenate detection.
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Sensitivity enhancement in slice-selective NMR experiments through polarization sharing

Chem. Commun. - 10 July, 2014 - 11:17

Chem. Commun., 2014, 50,8550-8553
DOI: 10.1039/C4CC02978J, Communication Lokesh, N. Suryaprakash
Sensitivity enhanced spatially encoded NMR experiments.
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A supramolecular hydrogelator of curcumin

Chem. Commun. - 10 July, 2014 - 11:17

Chem. Commun., 2014, Advance Article
DOI: 10.1039/C4CC03139C, CommunicationChengbiao Yang, Zhongyan Wang, Caiwen Ou, Minsheng Chen, Ling Wang, Zhimou Yang
The first supramolecular hydrogelator of curcumin is reported in this study.
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1,2,4,3-Triazaborole-based neutral oxoborane stabilized by a Lewis acid

Chem. Commun. - 10 July, 2014 - 11:17

Chem. Commun., 2014, 50,8561-8564
DOI: 10.1039/C4CC03379E, CommunicationYing Kai Loh, Che Chang Chong, Rakesh Ganguly, Yongxin Li, Dragoslav Vidovic, Rei Kinjo
A 1,2,4,3-triazaborole-based oxoborane derivative has been synthesized via hydrogen migration upon the coordination of AlCl3 to the corresponding borinic acid. X-ray diffraction analysis and computational study revealed the partial B[double bond, length as m-dash]O double-bond property.
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Two modes of photoinduced twisted intramolecular charge transfer in meso-arylaminated subporphyrins

Chem. Commun. - 10 July, 2014 - 11:17

Chem. Commun., 2014, 50,8491-8494
DOI: 10.1039/C4CC02368D, CommunicationWon-Young Cha, Jong Min Lim, Kyu Hyung Park, Masaaki Kitano, Atsuhiro Osuka, Dongho Kim
Photoinduced twisted intramolecular charge transfer (TICT) of meso-(4-dimethylamino)phenylamino subporphyrin 2 and meso-(4-nitro)phenylamino subporphyrin 3 has been revealed by steady-state and time-resolved absorption/fluorescence experiments and quantum calculations.
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High-sensitivity fluorescence imaging of iron in plant tissues

Chem. Commun. - 10 July, 2014 - 11:17

Chem. Commun., 2014, 50,8547-8549
DOI: 10.1039/C4CC02132K, CommunicationMi-Jeong Park, Hak-Sung Jung, Young-Jae Kim, Young-Ju Kwon, Jin-Kyu Lee, Chung-Mo Park
Fluorescence imaging of Fe ions in (a) leaf epidermal cells, (b) the stem, and (c) the root stem of Arabidopsis plants by the rapid, simple, and inexpensive photoinduced electron transfer (PET) fluorescent probing method.
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Polynorbornene derived 8-hydroxyquinoline paper strips for ultrasensitive chemical nerve agent surrogate sensing

Chem. Commun. - 10 July, 2014 - 11:17

Chem. Commun., 2014, 50,8511-8513
DOI: 10.1039/C4CC03361B, CommunicationOpen Access Open Access Creative Commons Licence&nbsp This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.Santu Sarkar, Raja Shunmugam
The detection of nerve agent simulants is achieved by the photoinduced electron transfer (PET) mechanism.
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Coordination polymers for catalysis: enhancement of catalytic activity through hierarchical structuring

Chem. Commun. - 10 July, 2014 - 11:17

Chem. Commun., 2014, 50,8543-8546
DOI: 10.1039/C4CC02909G, CommunicationFan-Xing Bu, Ming Hu, Li Xu, Qi Meng, Gui-Yun Mao, Dong-Mei Jiang, Ji-Sen Jiang
Hierarchical Prussian white (PW) crystals were synthesized by using a self-aggregation and etching strategy. The crystals exhibit superior catalytic activity in degradation of methylene blue to the non-hierarchical PW crystals.
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Synthesis of monolayer platinum nanosheets

Chem. Commun. - 10 July, 2014 - 11:17

Chem. Commun., 2014, 50,8503-8506
DOI: 10.1039/C4CC02527J, CommunicationA. Funatsu, H. Tateishi, K. Hatakeyama, Y. Fukunaga, T. Taniguchi, M. Koinuma, H. Matsuura, Y. Matsumoto
Platinum (Pt) nanosheets were developed by exfoliating layered platinum oxide. Moreover, we succeeded in synthesizing monolayer Pt nanosheets for the first time by adjusting the conditions for reduction. Monolayer Pt nanosheets were highly active in oxygen reduction reaction.
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[3+3] annulation of allylic phosphoryl-stabilized carbanions/phosphorus ylides and vinyl azides: a practice strategy for synthesis of polyfunctionalized anilines

Chem. Commun. - 10 July, 2014 - 11:17

Chem. Commun., 2014, 50,8539-8542
DOI: 10.1039/C4CC03462G, CommunicationShen Liu, Wenteng Chen, Jing Luo, Yongping Yu
Tandem Michael addition and Witting or Horner-Wadsworth-Emmons olefination initiated [3+3] annulation between vinyl azides and allylic phosphorus ylides or allylic phosphoryl-stabilized carbanions has been developed.
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Synthesis and pharmacological evaluation of like- and unlike-configured tetrahydro-2-benzazepines with the [small alpha]-substituted benzyl moiety in the 5-position

Org. and Biomol. Chem. - 9 July, 2014 - 05:17

Org. Biomol. Chem., 2014, 12,5407-5426
DOI: 10.1039/C4OB00510D, PaperPeer Hasebein, Bastian Frehland, Kirstin Lehmkuhl, Roland Frohlich, Dirk Schepmann, Bernhard Wunsch
5-Substituted tetrahydro-2-benzazepines were prepared and the relationship between the structure, in particular the stereochemistry, and the [sigma]1 affinity was analyzed.
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The structure of 3-(diethylborylethynyl)pyridine: a nonplanarly arranged cyclic trimer

Org. and Biomol. Chem. - 9 July, 2014 - 05:17

Org. Biomol. Chem., 2014, 12,5382-5387
DOI: 10.1039/C4OB00849A, PaperShigeharu Wakabayashi, Mitsumi Kuse, Aimi Kida, Seiji Komeda, Kazuyuki Tatsumi, Yoshikazu Sugihara
The cyclic trimer of 3-(diethylborylethynyl)pyridine is conformationally flexible enough to be affected by the crystal packing.
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Electrophilic sulfhydration of 8-nitro-cGMP involves sulfane sulfur

Org. and Biomol. Chem. - 9 July, 2014 - 05:17

Org. Biomol. Chem., 2014, 12,5360-5364
DOI: 10.1039/C4OB00868E, CommunicationV. Terzic, D. Padovani, V. Balland, I. Artaud, E. Galardon
The complex chemistry taking place between the messenger 8-nitro-cGMP and the gaseous transmitter H2S is governed by dioxygen and thiols.
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One-step synthesis of diazaspiro[4.5]decane scaffolds with exocyclic double bonds

Org. and Biomol. Chem. - 9 July, 2014 - 05:17

Org. Biomol. Chem., 2014, 12,5356-5359
DOI: 10.1039/C4OB00516C, CommunicationLidong Li, Qiong Hu, Pingping Zhou, Haifeng Xie, Xiaorong Zhang, Hao Zhang, Yadong Hu, Fei Yin, Yimin Hu
Unactivated yne-en-ynes reacted with a range of substituted aryl halides in the presence of Pd(OAc)2-PPh3 to afford diazaspiro[4.5]decane with exocyclic double bonds.
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