Chem. Commun.

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Metal-free Aminoamidiniumation Employing N-iodosuccinimide: Facile Syntheses of Bicyclic Imidazolidiniums and cyclic vicinal diamines

13 October, 2014 - 12:54
Chem. Commun., 2014, Accepted Manuscript
DOI: 10.1039/C4CC07082H, CommunicationJun Zhang, Gengtao Zhang, Weijie Wu, Xuejun Zhang, Min Shi
We describe an NIS-mediated aminoamidiniumation for the synthesis of bicyclic imidazolidinium salts, starting from readily available amidines. The methods proceed under very practical and clean reaction conditions without the need...
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The First Calcium-Catalyzed Nazarov Cyclisation

13 October, 2014 - 12:54
Chem. Commun., 2014, Accepted Manuscript
DOI: 10.1039/C4CC06501H, CommunicationDaniele Leonori, Jacob Davies
The first calcium-catalysed Nazarov cyclisation is described. The Ca(NTf2)(PF6) complex is found to be a very active catalyst for 4[small pi] electrocyclisations. The remarkable catalytic activity of this complex is attributed...
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Micropatterning of hydrophilic polyacrylamide brushes to resist cells adhesion but promote proteins retention

13 October, 2014 - 12:54
Chem. Commun., 2014, Accepted Manuscript
DOI: 10.1039/C4CC03994G, CommunicationJianwen Hou, Qiang Shi, Wei Ye, Paola Stagnaro, Jinghua Yin
Contrary to prevailing concept on protein adsorption and cell adhesion, a novel micropatterned polyacrylamide (PAAm) brushes that can resist cells adhesion but promote proteins retention is created through patterning of...
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The Copper(II)-Phytate-Terpyridine Ternary System: The First Crystal Structures Showing the Interaction of Phytate with bivalent metal and ammonium cations

13 October, 2014 - 12:54
Chem. Commun., 2014, Accepted Manuscript
DOI: 10.1039/C4CC07226J, CommunicationNicolas Veiga, Julia Torres, Carla Bazzicalupi, Antonio Bianchi, Carlos Kremer
Phytate, an abundant molecule in eukaryotic cells, interacts strongly with inorganic cations and polyamines. This interaction is essential in determining the possible functions of this biomolecule. We present here the...
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Organic Mixed Valency in Quadruple Hydrogen-bonded Triarylamine Dimers Bearing Ureido Pyrimidinedione Moieties

13 October, 2014 - 12:54
Chem. Commun., 2014, Accepted Manuscript
DOI: 10.1039/C4CC06779G, CommunicationKeishiro Tahara, Tetsufumi Nakakita, Shohei Katao, Jun-ichi Kikuchi
Triarylamine derivatives bearing an ureido pyrimidinedione moiety were synthesised and formed dimers in the solid state and solution through quadruple hydrogen-bonds. These bonding interactions stabilized the mixed-valence states of the...
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Nonconventional Chemical Inhibitors of microRNA: therapeutic scope

13 October, 2014 - 12:54
Chem. Commun., 2014, Accepted Manuscript
DOI: 10.1039/C4CC04514A, Feature ArticleGopal Gunanathan Jayaraj, Smita Nahar, Souvik Maiti
MicroRNAs (miRNA) are a class of genomically encoded small RNA molecules (~ 22nts in length) which regulate gene expression post transcriptionally. The term microRNA or miRNA was coined in 2001...
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Highly Diastereo- and Enantioselective Construction of Spiro[cyclopenta[b]indole-1,3'-oxindole] Scaffold via Catalytic Asymmetric Formal [3+2] Cycloadditions

13 October, 2014 - 12:54
Chem. Commun., 2014, Accepted Manuscript
DOI: 10.1039/C4CC07246D, CommunicationWei Tan, Xin Li, Yu-Xin Gong, Meng-Di Ge, Feng Shi
An organocatalytic asymmetric formal [3+2] cycloaddition of isatin-derived 3-indolylmethanol with 3-methyl-2-vinylindole has been established, leading to highly stereoselective construction of spiro[cyclopenta[b]indole-1,3'-oxindole] scaffold with concomitant creation of three contiguous stereogenic centers...
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Synthesis aided structural determination of amyloid-[small beta] (1-15) glycopeptide, a new biomarker for Alzheimer's disease

13 October, 2014 - 12:54
Chem. Commun., 2014, Accepted Manuscript
DOI: 10.1039/C4CC05085A, CommunicationPeng Wang, Jonas Nilsson, Gunnar Brinkmalm, Goran Larson, Xuefei Huang
Amyloid-[small beta] glycopeptides are promising biomarkers for early diagnosis of Alzheimer's disease. To decipher their structures, tyrosine glycosylated amyloid-[small beta] (1-15) glycopeptides were synthesized with well-defined stereochemistry at the glycosidic linkages. Aided...
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Synthesis of [small alpha]-(Aminomethyl)-[gamma]-Butyrolactones via a Catalyst-free Aminolactonization

13 October, 2014 - 12:54
Chem. Commun., 2014, Accepted Manuscript
DOI: 10.1039/C4CC05765A, CommunicationP Veeraraghavan Ramachandran, Daniel R. Nicponski
An auto-catalytic domino reaction involving an aza-Michael reaction, proton transfer, and lactonization furnishing [small alpha]-(aminomethyl)-[gamma]-butyrolatones in near quantitative yields and excellent diastereoselectivity is described.
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Aggregation-induced emission (AIE) of Pyridyl-enamido-based Organoboron luminophores

13 October, 2014 - 12:54
Chem. Commun., 2014, Accepted Manuscript
DOI: 10.1039/C4CC07451C, CommunicationZhipeng Liu, Xiaoqing Wang, Yanping Wu, Qingsong Liu, Zhenyu Li, Hui Yan, Chonglei Ji, Jicheng Duan
A new family of pyridyl-enamido-based organoboron complexes (Borepy1-4) with aggregation-induced emission (AIE) properties were developed. They show very weak fluorescence in low-viscosity organic solvents and exhibit intense fluorescence in high-viscosity...
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Aurophilically cross-linked "dynamic" hydrogels mimicking healthy synovial fluid properties

13 October, 2014 - 12:54
Chem. Commun., 2014, Accepted Manuscript
DOI: 10.1039/C4CC05735J, CommunicationPablo Casuso, Adrian Perez-San Vicente, Haizea Iribar, Araika Gutierrez Rivera, Ander Izeta, Iraida Loinaz, German Cabanero, Hans J Grande, Ibon Odriozola, Damien Dupin
Herein we report the first preparation of an injectable polymeric supramolecular hydrogel based on thiols terminated linear poly(ethylene glycol) polymer chain cross-linked by addition of gold(I) ions. Au-thiolates interactions held...
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Microtubes and Hollow Microspheres Formed by Winding of Nanoribbons from Self-Assembly of Tetraphenylethylene Amide Macrocycle

13 October, 2014 - 12:54
Chem. Commun., 2014, Accepted Manuscript
DOI: 10.1039/C4CC05390G, CommunicationYan-Song Zheng, Song Song, Hua-Fei Zheng, Hai-Tao Feng
New amide macrocycles based on tetraphenylethylene (TPE) were synthesized. It was found that the TPE amide macrocycle could form microtubes in H2O/THF with 70-80% water by rolling up of big...
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pH responsive polymersome Pickering emulsion for simple and efficient Janus polymersome fabrication

13 October, 2014 - 12:54

Chem. Commun., 2014, Advance Article
DOI: 10.1039/C4CC07048H, CommunicationZhipeng Wang, Floris P. J. T. Rutjes, Jan C. M. van Hest
A versatile and easy to use method is reported for the preparation of Janus polymersomes via a Pickering emulsion strategy.
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Diffusion of vaporous guests into a seemingly non-porous organic crystal

13 October, 2014 - 12:54

Chem. Commun., 2014, Advance Article
DOI: 10.1039/C4CC07366E, CommunicationSimon A. Herbert, Agnieszka Janiak, Praveen K. Thallapally, Jerry L. Atwood, Leonard J. Barbour
The tetragonal apohost phase of p-tert-butyltetramethoxythiacalix[4]arene absorbs hydrochloric acid and iodine.
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Transformation from non- to double-interpenetration in robust Cd(II) doubly-pillared-layered metal-organic frameworks

13 October, 2014 - 12:54

Chem. Commun., 2014, Advance Article
DOI: 10.1039/C4CC07112C, CommunicationHimanshu Aggarwal, Prem Lama, Leonard J. Barbour
Two known Cd(II) non-interpenetrated doubly-pillared metal organic frameworks are shown to undergo change of degree of interpenetration upon loss of lattice solvent molecules, thus resulting in doubly-interpenetrated frameworks.
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Adjusting the inter-particle spacing of a nanoparticle array at the sub-nanometre scale by thermal annealing

13 October, 2014 - 12:54

Chem. Commun., 2014, Advance Article
DOI: 10.1039/C4CC06912A, CommunicationJ. Zhou, H. Liu, T. Wang, Y. Li, J. Zhang, Z. Lu, Y. Fu, F. Li
A successful attempt to fabricate nanoparticle arrays with sub-nanometre spacing by thermal annealing of the prepared nanoparticle self-assembly was made.
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Direct evidence for catalase activity of [RuV(edta)(O)]-

13 October, 2014 - 12:54

Chem. Commun., 2014, Advance Article
DOI: 10.1039/C4CC06631F, CommunicationDebabrata Chatterjee, Namita Jaiswal, Alicja Franke, Rudi van Eldik
Reported is the first example of a ruthenium complex, RuIII(edta) (edta4- = ethylenediaminetetraacetate), which mimics catalase activity by forming compound I type species, [RuV(edta)(O)]- which reacts with another molecule of H2O2 to produce O2 in the reaction system.
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Oxidative tandem nitrosation/cyclization of N-aryl enamines with nitromethane toward 3-(trifluoromethyl)quinoxalines

13 October, 2014 - 12:54

Chem. Commun., 2014, Advance Article
DOI: 10.1039/C4CC07083F, CommunicationZhi-Jun Yang, Chuan-Zhuo Liu, Bo-Lun Hu, Chen-Liang Deng, Xing-Guo Zhang
3-Trifluoromethylquinoxalines were prepared in good yields by tandem nitrosation/cyclization of N-aryl enamines and nitromethane with excellent functional group tolerance.
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Amine-accelerated manganese-catalyzed aromatic C-H conjugate addition to [small alpha],[small beta]-unsaturated carbonyls

13 October, 2014 - 12:54

Chem. Commun., 2014, Advance Article
DOI: 10.1039/C4CC07598F, CommunicationBingwei Zhou, Pengchen Ma, Hui Chen, Congyang Wang
Herein we describe the first manganese-catalyzed direct aromatic C-H conjugate addition to [small alpha],[small beta]-unsaturated carbonyls, which is accelerated by a catalytic amount of dicyclohexylamine.
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N-Heterocyclic carbene-catalyzed enantioselective synthesis of functionalized cyclopentenes via [small alpha],[small beta]-unsaturated acyl azoliums

13 October, 2014 - 12:54

Chem. Commun., 2014, Advance Article
DOI: 10.1039/C4CC07433E, CommunicationSantigopal Mondal, Santhivardhana Reddy Yetra, Atanu Patra, Sunita S. Kunte, Rajesh G. Gonnade, Akkattu T. Biju
Highly enantioselective NHC-organocatalyzed synthesis of functionalized cyclopentenes by the reaction of modified enals with malonic ester derivatives having a [gamma]-benzoyl group is reported.
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