Royal Society of Chemistry

Catalytic amide allylation of [small alpha]-ketoesters: extremely high enantioselective synthesis of ester functionalised [small alpha]-methylene-[gamma]-butyrolactones

Org. and Biomol. Chem. - 24 September, 2014 - 01:54

Org. Biomol. Chem., 2014, 12,7686-7689
DOI: 10.1039/C4OB01508H, CommunicationMasaki Takahashi, Yusuke Murata, Masahiro Ishida, Fumitoshi Yagishita, Masami Sakamoto, Tetsuya Sengoku, Hidemi Yoda
A significant breakthrough on the novel amide allylation on the acyclic [small alpha]-ketoester systems, achieving extremely high enantioselective synthesis of ester functionalised [small alpha]-methylene-[gamma]-butyrolactones, is reported.
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The transition-metal-catalyst-free oxidative homocoupling of organomanganese reagents prepared by the insertion of magnesium into organic halides in the presence of MnCl2[middle dot]2LiCl

Org. and Biomol. Chem. - 24 September, 2014 - 01:54

Org. Biomol. Chem., 2014, 12,7800-7809
DOI: 10.1039/C4OB01235F, PaperZhihua Peng, Na Li, Xinyang Sun, Fang Wang, Lanjian Xu, Cuiyu Jiang, Linhua Song, Zi-Feng Yan
An oxidative homocoupling of organomanganese reagents was performed in one pot without an additional transition-metal catalyst.
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An economical and environmentally friendly oxidative biaryl coupling promoted by activated MnO2

Org. and Biomol. Chem. - 24 September, 2014 - 01:54

Org. Biomol. Chem., 2014, 12,7774-7779
DOI: 10.1039/C4OB01409J, PaperJingjing Yang, Shutao Sun, Ziyu Zeng, Hongbo Zheng, Wei Li, Hongxiang Lou, Lei Liu
A mild, economical, and environmentally friendly oxidative biaryl coupling by MnO2 was developed to deliver five- to eight-membered tricyclic products.
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Ultrasound-assisted 1,3-dipolar cycloaddition and cyclopropanation reactions for the synthesis of bis-indolizine and bis-cyclopropane derivatives

Org. and Biomol. Chem. - 24 September, 2014 - 01:54

Org. Biomol. Chem., 2014, 12,7859-7863
DOI: 10.1039/C4OB01305K, PaperMehdi Abaszadeh, Mohammad Seifi
We report a new method for the synthesis of bis-indolizine and bis-cyclopropane derivatives under ultrasound irradiation, using a 1,3-dipolar cycloaddition reaction or a cyclopropanation reaction, respectively.
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Palladium-catalyzed one pot 2-arylquinazoline formation via hydrogen-transfer strategy

Org. and Biomol. Chem. - 24 September, 2014 - 01:54

Org. Biomol. Chem., 2014, 12,7792-7799
DOI: 10.1039/C4OB01296H, PaperHuamin Wang, Hui Chen, Ya Chen, Guo-Jun Deng
2-Arylquinazolines were prepared from nitroarenes and benzyl alcohols or benzyl amines via a hydrogen transfer strategy.
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Synthesis of isoquinoline-1,3(2H,4H)-dione derivatives via cascade reactions of N-alkyl-N-methacryloyl benzamide with aryl aldehydes

Org. and Biomol. Chem. - 24 September, 2014 - 01:54

Org. Biomol. Chem., 2014, 12,7690-7693
DOI: 10.1039/C4OB01442A, CommunicationWannian Zhao, Ping Xie, Min Zhang, Ben Niu, Zhaogang Bian, Charles Pittman, Aihua Zhou
A cascade reaction between N-alkyl-N-methacryloylbenzamide and aryl aldehydes was developed to generate isoquinoline-1,3(2H,4H)-dione derivatives.
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Linear synthesis of the branched pentasaccharide repeats of O-antigens from Shigella flexneri 1a and 1b demonstrating the major steric hindrance associated with type-specific glucosylation

Org. and Biomol. Chem. - 24 September, 2014 - 01:54

Org. Biomol. Chem., 2014, 12,7728-7749
DOI: 10.1039/C4OB01200C, PaperJason M. Hargreaves, Yann Le Guen, Catherine Guerreiro, Karine Descroix, Laurence A. Mulard
Shigella flexneri serotypes 1b and 1a are Gram-negative enteroinvasive bacteria causing shigellosis in humans.
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Synthesis of a chiral building block for highly functionalized polycyclic ethers

Org. and Biomol. Chem. - 24 September, 2014 - 01:54

Org. Biomol. Chem., 2014, 12,7750-7757
DOI: 10.1039/C4OB01439A, PaperG. Pazos, M. Perez, Z. Gandara, G. Gomez, Y. Fall
An efficient procedure for preparing enantiopure polycyclic ethers based on the furan singlet oxygen oxidation approach is reported.
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A versatile strategy for appending a single functional group to a multifunctional host through host-guest covalent-capture

Org. and Biomol. Chem. - 24 September, 2014 - 01:54

Org. Biomol. Chem., 2014, 12,7780-7785
DOI: 10.1039/C4OB01429D, PaperJean-Noel Rebilly, Assia Hessani, Benoit Colasson, Olivia Reinaud
A novel two-step strategy allowed us to selectively monofunctionalize a molecular host (calix[6]arene) with various groups of interest (redox tag, fluorophore, chelating ligand).
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Copper-catalyzed direct alkylation of 1,3-azoles with N-tosylhydrazones bearing a ferrocenyl group: a novel method for the synthesis of ferrocenyl-based ligands

Org. and Biomol. Chem. - 24 September, 2014 - 01:54

Org. Biomol. Chem., 2014, 12,7721-7727
DOI: 10.1039/C4OB01093K, PaperQiang Teng, Jianfeng Hu, Li Ling, Ranfeng Sun, Junyang Dong, Shufeng Chen, Hao Zhang
A new type of 1,1[prime or minute]-disubstituted ferrocenyl (N,N) bidentate ligand was synthesised via CuBr-catalyzed coupling of 1,3-azoles with ferrocenyl ketone-derived N-tosylhydrazones.
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Dithienylethene-based rotaxanes: synthesis, characterization and properties

Org. and Biomol. Chem. - 24 September, 2014 - 01:54

Org. Biomol. Chem., 2014, 12,7712-7720
DOI: 10.1039/C4OB01213E, PaperFang Hu, Juanyun Huang, Meijiao Cao, Zhao Chen, Ying-Wei Yang, Sheng Hua Liu, Jun Yin
The photochromic materials have been widely applied in many fields.
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Photo-responsive [2]catenanes: synthesis and properties

Org. and Biomol. Chem. - 24 September, 2014 - 01:54

Org. Biomol. Chem., 2014, 12,7702-7711
DOI: 10.1039/C4OB01120A, PaperZiyong Li, Fang Hu, Guoxing Liu, Wen Xue, Xiaoqiang Chen, Sheng Hua Liu, Jun Yin
A series of novel dithienylethene-based macrocycles containing ammonium moieties has been synthesized.
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A unifying mechanism for the rearrangement of vinyl allene oxide geometric isomers to cyclopentenones

Org. and Biomol. Chem. - 24 September, 2014 - 01:54

Org. Biomol. Chem., 2014, 12,7694-7701
DOI: 10.1039/C4OB00562G, PaperAdan B. Gonzalez-Perez, Alexander Grechkin, Angel R. de Lera
Z-Vinyl allene oxides are predicted to rearrange with high fidelity to stereodefined cyclopentenones through intermediate cyclopropanones.
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Facile synthesis of a genuinely alkane-soluble but isolable lithium hydride transfer reagent

Chem. Commun. - 23 September, 2014 - 06:54

Chem. Commun., 2015, Advance Article
DOI: 10.1039/C4CC06421F, CommunicationStuart D. Robertson, Alan R. Kennedy, John J. Liggat, Robert E. Mulvey
1-Lithio-2-alkyl-1,2-dihydropyridines, easily formed from addition of (n- or t-)BuLi to pyridine, have been compared; the steric bulk of the branched alkyl substituent enforces lesser oligomerization, thus enhancing alkane solubility making it an amenable, convenient lithium hydride transfer reagent in non-polar, aliphatic media.
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Double zipper helical assembly of deoxyoligonucleotides: mutual templating and chiral imprinting to form hybrid DNA ensembles

Chem. Commun. - 23 September, 2014 - 06:54

Chem. Commun., 2014, Advance Article
DOI: 10.1039/C4CC06759B, CommunicationNagarjun Narayanaswamy, Gorle Suresh, U. Deva Priyakumar, T. Govindaraju
Herein, the conventional and unconventional hydrogen bonding potential of adenine in APA for double zipper helical assembly of deoxyoligonucleotides is demonstrated under ambient conditions.
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Fine tuning the ionic liquid-vacuum outer atomic surface using ion mixtures

Chem. Commun. - 23 September, 2014 - 06:54

Chem. Commun., 2014, Advance Article
DOI: 10.1039/C4CC06307D, CommunicationIgnacio J. Villar-Garcia, Sarah Fearn, Nur L. Ismail, Alastair J. S. McIntosh, Kevin R. J. Lovelock
Ionic liquid-vacuum outer atomic surfaces can be created that are remarkably different from the bulk composition.
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Haemoglobin wrapped covalently by human serum albumin mutants containing Mn(III) protoporphyrin IX: an O2 complex stable in H2O2 solution

Chem. Commun. - 23 September, 2014 - 06:54

Chem. Commun., 2014, Advance Article
DOI: 10.1039/C4CC06076H, CommunicationOpen Access Open Access Creative Commons Licence&nbsp This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.Y. Daijima, T. Komatsu
Haemoglobin (Hb) wrapped covalently by human serum albumin mutants [HSA(Y161H)] containing Mn(III) protoporphyrin IX (MnPP), the Hb-[HSA(Y161H)-MnPP]3 cluster, formed a stable O2-complex even in H2O2 solution.
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Crystal structure, DFT, spectroscopic and biological activity evaluation of analgin complexes with Co(II), Ni(II) and Cu(II)

Dalton Transactions - 22 September, 2014 - 12:54

Dalton Trans., 2014, Advance Article
DOI: 10.1039/C4DT02366H, PaperAhmed M. Mansour
Coordination of analgin to Ni(II) and Cu(II) ions as a mono-negatively tridentate ligand leads to a significant increase in its antibacterial activity compared with the Co(II) complex.
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Selective synthesis of cis- and trans-[(NHCMe)2PtCl2] and [NHCMePt(cod)Cl][NHCMePtCl3] using NHCMeSiCl4

Dalton Transactions - 22 September, 2014 - 12:54

Dalton Trans., 2014, Advance Article
DOI: 10.1039/C4DT02214A, CommunicationLesley C. Lewis-Alleyne, Bassem S. Bassil, Tobias Bottcher, Gerd-Volker Roschenthaler
NHCMeSiCl4 was used to selectively synthesise cis and trans-[(NHCMe)2PtCl2], as well as [NHCMePt(cod)Cl][NHCMePtCl3], which revealed the first ever N-heterocyclic carbene analogue of the Cossa's salt anion.
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Structural diversity and magnetic properties of six metal-organic polymers based on semirigid tricarboxylate ligand of 3,5-bi(4-carboxyphenoxy)benzoic acid

Dalton Transactions - 22 September, 2014 - 12:54

Dalton Trans., 2014, Advance Article
DOI: 10.1039/C4DT01953A, PaperLiming Fan, Weiliu Fan, Weikuo Song, Liming Sun, Xian Zhao, Xiutang Zhang
Six new metal-organic complexes with structural diversities constructed from 3,5-bi(4-carboxyphenoxy)benzoic acid and metal ions were synthesized and characterized.
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