bluuebunny/crossref_metadata_2025_split huggingface dataset:
Preparation and characterization of methoxy‐poly(ethylene glycol) side chain grafted onto chitosan as a wound dressing film
Authors: Yang Cheng‐Han , Chen Szu‐Hsien , Pan Yun‐Wen , Chuang Ching‐Nan , Chao Wen‐Chi , Young Tai‐Horng , Chiu Wen‐Yen , Wang Chih‐Kuang , Hsieh Kuo‐Huang 
Published: May 2015

ABSTRACTChitosan has received extensive attention as a biomedical material; however, the poor solubility of chitosan is the major limiting factor in its utilization. In this study, chitosan‐based biomaterials with improved aqueous solubility were synthesized. Two molecular weights (750 Da and 2000 Da) of methoxypoly(ethylene glycol) (mPEG) were grafted onto chitosan (mPEG‐g‐chitosan) to form a ∼100‐μm‐thick plastic film as a wound dressing. The chemical structures of the mPEG‐g‐chitosan copolymers were confirmed using Fourier transform infrared spectroscopy (FTIR), and the thermal properties were characterized using thermogravimetry analysis (TGA). Their microstructures were observed using scanning electron microscopy (SEM). The other properties were analyzed via the swelling ratio, tensile strength, elongation, and water vapor transmission rate (WVTR). Biocompatibility evaluations through biodegradability, cytotoxicity, and antimicrobial effect studies were also performed. The obtained mPEG‐g‐chitosan copolymers were soluble in slightly acidic aqueous solutions (pH∼6.5) at a concentration of 10 wt %. The optimal mPEG‐g‐chitosan hydrogels had swelling ratios greater than 100% and WVTRs greater than 2000 g/m2/day. Their performance against Staphylococcus aureus will be subjected to further improvements with respect to medical applications. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42340.
Photoredox Catalysis of Intramolecular Cyclizations with a Reusable Silica‐Bound Ruthenium Complex
Authors: Barbante Gregory J. , Ashton Trent D. , Doeven Egan H. , Pfeffer Frederick M. , Wilson David J. D. , Henderson Luke C. , Francis Paul S. 
Published: May 2015

AbstractPhotoredox catalysis with the use of a stable, reusable silica‐bound chromophore was applied to the intramolecular cyclization of a series of 2‐benzylidenehydrazinecarbothioamides to give 5‐phenyl‐1,3,4‐thiadiazol‐2‐amines. The catalyst was readily prepared by carbodiimide‐mediated coupling of commercially available amine‐functionalized silica beads to a carboxylic acid functionalized ruthenium complex. The immobilized catalyst was readily removed from the reaction product by filtration and was used eight times without loss of catalytic activity. This simple, safe, and practical method is an attractive alternative to conventional procedures.
Template‐Free Electrodeposition of SnSi Nanowires from an Ionic Liquid
Authors: Elbasiony Amr M. , Olschewski Mark , El Abedin Sherif Zein , Endres Frank 
Published: May 2015

AbstractWe report the template‐free electrodeposition of SnSi nanowires from the ionic liquid 1‐butyl‐1‐methylpyrrolidinium trifluoromethylsulfonate, [Py1,4]TfO, containing SnCl2 and SiCl4. The electrochemical behavior of the employed electrolyte was investigated by using cyclic voltammetry. The obtained nanowire films were characterized by SEM/EDX, XRD, UV spectroscopy, and XPS. The results show that freestanding and hair‐like SnSi nanowires can be obtained through potentiostatic electrodeposition at different potentials after running cyclic voltammetry. The XPS and EDX results reveal the composition of the films and show that SnSi co‐deposits are formed. XRD patterns indicate the formation of amorphous Si and no clear indication of the formation of a SnSi alloy. The band gap of the deposited film was determined from the UV spectrum to be 1.55 eV.
Photoinduced Morphological Transformations of Soft Nanotubes
Authors: Kameta Naohiro , Masuda Mitsutoshi , Shimizu Toshimi 
Published: May 2015

AbstractIn water, synthetic amphiphiles composed of a photoresponsive azobenzene moiety and an oligoglycine hydrogen‐bonding moiety selectively self‐assembled into nanotubes with solid bilayer membranes. The nanotubes underwent morphological transformations induced by photoisomerization of the azobenzene moiety within the membranes, and the nature of the transformation depended on the number of glycine residues in the oligoglycine moiety (i.e., on the strength of intermolecular hydrogen bonding). Upon UV‐light irradiation of nanotubes prepared from amphiphiles with the diglycine residue, trans‐to‐cis isomerization induced a transformation from nanotubes (inner diameter (i.d.) 7 nm), several hundreds of nanometers to several tens of micrometers in length, to imperfect nanorings (i.d. 21–38 nm). The cis‐to‐trans isomerization induced by continuous visible‐light irradiation resulted in the stacking of the imperfect nanorings to form nanotubes with an i.d. of 25 nm and an average length of 310 nm, which were never formed by a self‐assembly process. Time‐lapse fluorescence microscopy enabled us to visualize the transformation of nanotubes with an i.d. of 20 nm (self‐assembled from amphiphiles with the monoglycine residue) to cylindrical nanofibers with an i.d. of 1 nm; shrinkage of the hollow cylinders started at the two open ends with simultaneous elongation in the direction of the long axis.
A Cytostatic Ruthenium(II)–Platinum(II) Bis(terpyridyl) Anticancer Complex That Blocks Entry into S Phase by Up‐regulating p27KIP1
Authors: Ramu Vadde , Gill Martin R. , Jarman Paul J. , Turton David , Thomas Jim A. , Das Amitava , Smythe Carl 
Published: May 2015

AbstractCytostatic agents that interfere with specific cellular components to prevent cancer cell growth offer an attractive alternative, or complement, to traditional cytotoxic chemotherapy. Here, we describe the synthesis and characterization of a new binuclear RuII–PtII complex [Ru(tpy)(tpypma)Pt(Cl)(DMSO)]3+ (tpy=2,2′:6′,2′′‐terpyridine and tpypma=4‐([2,2′:6′,2′′‐terpyridine]‐4′‐yl)‐N‐(pyridin‐2‐ylmethyl)aniline), VR54, which employs the extended terpyridine tpypma ligand to link the two metal centres. In cell‐free conditions, VR54 binds DNA by non‐intercalative reversible mechanisms (Kb=1.3×105 M−1) and does not irreversibly bind guanosine. Cellular studies reveal that VR54 suppresses proliferation of A2780 ovarian cancer cells with no cross‐resistance in the A2780CIS cisplatin‐resistant cell line. Through the preparation of mononuclear RuII and PtII structural derivatives it was determined that both metal centres are required for this anti‐proliferative activity. In stark contrast to cisplatin, VR54 neither activates the DNA‐damage response network nor induces significant levels of cell death. Instead, VR54 is cytostatic and inhibits cell proliferation by up‐regulating the cyclin‐dependent kinase inhibitor p27KIP1 and inhibiting retinoblastoma protein phosphorylation, which blocks entry into S phase and results in G1 cell cycle arrest. Thus, VR54 inhibits cancer cell growth by a gain of function at the G1 restriction point. This is the first metal‐coordination compound to demonstrate such activity.
Polyfunctional Lewis Acids: Intriguing Solid‐State Structure and Selective Detection and Discrimination of Nitroaromatic Explosives
Authors: Swamy P Chinna Ayya , Thilagar Pakkirisamy 
Published: May 2015

AbstractSynthesis and crystal structures of three porphyrin‐based polyfunctional Lewis acids 1–3 are reported. Intermolecular HgCl⋅⋅⋅HgCl (linear and μ‐type) interactions in the solid state of the peripherally ArHgCl‐decorated compound 3 lead to a fascinating 3D supramolecular architecture. Compound 3 shows a selective fluorescence quenching response to picric acid and discriminates other nitroaromatic‐based explosives. For the first time, an electron‐deficient polyfunctional Lewis acid is shown to be useful for the selective detection and discrimination of nitroaromatic explosives. The Stern–Volmer quenching constant and detection limits of compound 3 for picric acid are the best among the reported small‐molecular receptors for nitroaromatic explosives. The electronic structure, Lewis acidity, and selective sensing characteristics of 3 are well corroborated by DFT calculations.
ChemInform Abstract: Strongest Second Harmonic Generation in the Polar R3MTQ7 Family: Atomic Distribution Induced Nonlinear Optical Cooperation.
Authors: Shi Yong‐Fang , Chen Yu‐kun , Chen Mei‐Chun , Wu Li‐Ming , Lin Hua , Zhou Liu‐Jiang , Chen Ling 
Published: May 2015

AbstractYellow single crystals of the Ln3MTQ7 NLO material family, La3Ga0.5 (Ge0.5/Ga0.5)S7 (I), La3In0.5 (Ge0.5/In0.5)S7 (II), Sm3Ga0.5 (Ge0.5/Ga0.5)S7 (III), La3In0.33GeS7 (IV), Sm3In0.33GeS7(V), and Gd3In0.33GeS7 (VI) are prepared by solid state reaction of stoichiometric amounts of rare earths, Ge, In (Ga), and S (950‐980 °C, 100‐120 h; controlled cooling).
ChemInform Abstract: Hydrothermal Synthesis of Single Crystal CoAs2O4 and NiAs2O4 Compounds and Their Magnetic Properties.
Authors: Dordevic Tamara , Wittwer Astrid , Jaglicic Zvonko , Djerdj Igor 
Published: May 2015

AbstractSingle crystals of CoAs2O4 (I) are grown under hydrothermal conditions using an aqueous 1:1:1 molar mixture of KCl, Co(OH)2, and As2O3 at pH 6 (autoclave, 200 °C, 199 h; cooling to 25 °C within 98 h).
ChemInform Abstract: Homogeneity Range of the Zirconium Phosphide Telluride Zr2+xPTe2 and the High‐Temperature Phase Transformation to Zr2PTe.
Authors: Scholz Tanja , Schmidt Peer 
Published: May 2015

AbstractZr2+xPTe2 (0 ≤ x ≤ 0.5) is synthesized by solid state reaction of stoichiometric mixtures of the elements (evacuated silica ampules, 650 °C, 48 h) and characterized by powder XRD and thermogravimetric measurements.
ChemInform Abstract: Structural Relationship Between the Mg‐Containing Nitridosilicates Ca2Mg[Li4Si2N6] and Li2Ca2[Mg2Si2N6].
Authors: Schmiechen Sebastian , Nietschke Frederik , Schnick Wolfgang 
Published: May 2015

AbstractSingle crystals of the new compounds (VI) and (VII) are synthesized by solid state metathesis reactions using Li as a fluxing agent.
ChemInform Abstract: Further Insight into Uranium and Thorium Metaphosphate Chemistry and the Effect of Nd3+ Incorporation into Uranium(IV) Metaphosphate.
Authors: Yu Na , Klepov Vladislav V. , Neumeier Stefan , Depmeier Wulf , Bosbach Dirk , Suleimanov Evgeny V. , Alekseev Evgeny V. 
Published: May 2015

AbstractCompounds (IV), (V), (VIII), and (X) are characterized by single crystal XRD and Raman spectroscopy.
ChemInform Abstract: Flux Synthesis, Modulated Crystal Structures, and Physical Properties of REMn0.5SeO (RE: La, Ce).
Authors: Peschke Simon , Nitsche Fabian , Johrendt Dirk 
Published: May 2015

AbstractSingle crystals of the title compounds are prepared by reaction of Ln2O3 (Ln: La, Ce), Ln, Mn, and Se in a eutectic NaI/KI flux (carbon crucible, 800 °C, 4 d).
ChemInform Abstract: Enantioselective Synthesis of Benzoindolizidine Derivatives Using Chiral Phase‐Transfer Catalytic Intramolecular Domino Aza‐Michael Addition/Alkylation.
Authors: Guo Jiajia , Yu Shouyun 
Published: May 2015

AbstractThe title transformation is enabled by cinchona alkaloid‐derived quaternary ammonium salts as the phase‐transfer catalyst.
ChemInform Abstract: Synergistic Steric Effects in the Development of a Palladium‐Catalyzed Alkyne Carbohalogenation: Stereodivergent Synthesis of Vinyl Halides.
Authors: Le Christine M. , Menzies Perry J. C. , Petrone David A. , Lautens Mark 
Published: May 2015

AbstractIntramolecular Pd‐catalyzed alkyne carbohalogenation can be achieved by exploiting the synergistic steric effects between substrate and catalyst.
ChemInform Abstract: Chemo‐ and Stereo‐Selectivity in Oxidation of Fluorinated Cyclic Sulfides by m‐Chloroperoxybenzoic Acid.
Authors: Petrov Viacheslav A. , Marshall Will 
Published: May 2015

AbstractCyclic sulfoxides are obtained by controlled oxidation of various hexafluorothioacetone cycloadducts with MCPBA at low temperature.
ChemInform Abstract: Transfer Hydrogenation of Ketones, Nitriles, and Esters Catalyzed by a Half‐Sandwich Complex of Ruthenium.
Authors: Lee Sun‐Hwa , Nikonov Georgii I. 
Published: May 2015

AbstractTransfer hydrogenation under mild conditions allows for the reduction of ketones to alcohols, aldimines to amines as well as aryl nitriles to benzyl imines which are further hydrolysed to the corresponding benzyl amines.
ChemInform Abstract: The Palladium‐Catalyzed Intermolecular C—H Chalcogenation of Arenes.
Authors: Qiu Renhua , Reddy Vutukuri Prakash , Iwasaki Takanori , Kambe Nobuaki 
Published: May 2015

AbstractThe direct, Pd‐catalyzed chalcogenation of N‐containing heteroaromates with Ph2S2 and Ph2Se2, respectively, is achieved using pyrimidine as a readily removable directing group.
ChemInform Abstract: A New Method for the Preparation of Non‐terminal Alkynes: Application to the Total Syntheses of Tulearin A and C.
Authors: Lehr Konrad , Schulthoff Saskia , Ueda Yoshihiro , Mariz Ronaldo , Leseurre Lucie , Gabor Barbara , Fuerstner Alois 
Published: May 2015

AbstractLactones are converted to methyl alkynes and dimethyl allenes in a two‐step procedure utilizing a CCl4/PPh3—MeLi—system.
ChemInform Abstract: Asymmetric Carbamoyl Anion Additions to Chiral N‐Phosphonyl Imines via the GAP Chemistry Process and Stereoselectivity Enrichments.
Authors: Seifert Cole W. , Pindi Suresh , Li Guigen 
Published: May 2015

AbstractCarbamoyl anion addition to chiral N‐phosphonyl imines provides direct access to glycine amide derivatives.
ChemInform Abstract: Selective and Scalable Synthesis of Trifluoromethanesulfenamides and Fluorinated Unsymmetrical Disulfides Using a Shelf‐Stable Electrophilic SCF3 Reagent.
Authors: Pluta Roman , Rueping Magnus 
Published: May 2015

AbstractChemoselective trifluoromethylthiolation of various nitrogen nucleophiles and thiols is achieved using N‐(trifluoromethylthio)phthalimide (II) under mild and metal‐free conditions.
ChemInform Abstract: Lewis and Broensted Acid Cocatalyzed Reductive Deoxyallenylation of Propargylic Alcohols with 2‐Nitrobenzenesulfonylhydrazide.
Authors: Liu Zhaohong , Liao Peiqiu , Bi Xihe 
Published: May 2015

AbstractA novel methodology for the reductive deoxyallenylation of sterically hindered propargylic alcohols such as (I), (III), and (V) is described.
ChemInform Abstract: Metal‐Free Synthesis of ortho‐CHO Diaryl Ethers by a Three‐Component Sequential Coupling.
Authors: Liu Fangliang , Yang Huameng , Hu Xinquan , Jiang Gaoxi 
Published: May 2015

AbstractThe coupling between ortho‐trimethylsilyl aryl triflates, N,N‐dimethylformamide and diaryliodonium salts tolerates various functional groups.
ChemInform Abstract: Synthesis of α‐Amino Acid Derivatives and Peptides via Enantioselective Addition of Masked Acyl Cyanides to Imines.
Authors: Yang Kin S. , Rawal Viresh H. 
Published: May 2015

AbstractThe method is applicable to various aryl and alkyl imines, providing the corresponding masked acyl cyanides in excellent yields and with high enantioselectivities.
ChemInform Abstract: Development of a Palladium‐Catalyzed α‐Arylation of Cyclopropyl Nitriles.
Authors: McCabe Dunn Jamie M. , Kuethe Jeffrey T. , Orr Robert K. , Tudge Matthew , Campeau Louis‐Charles 
Published: May 2015

AbstractCyclopropyl, cyclobutyl, and cyclopentylcyanide including substituted cyclopropylcyanide are submitted to cross‐coupling reactions with a variety of aryl and hetaryl bromides as well as 1,4‐dibromobenzene.
ChemInform Abstract: Direct Transformation of Terminal Alkynes to Branched Allylic Sulfones.
Authors: Xu Kun , Khakyzadeh Vahid , Bury Timm , Breit Bernhard 
Published: May 2015

AbstractThe scalable transformation is based on a benzoic acid/rhodium‐catalyst system which affords branched allylic sulfones with good to excellent yields and selectivities.
ChemInform Abstract: A Mild Copper‐Catalyzed Aerobic Oxidative Thiocyanation of Arylboronic Acids with TMSNCS.
Authors: Sun Nan , Che Liusheng , Mo Weimin , Hu Baoxiang , Shen Zhenlu , Hu Xinquan 
Published: May 2015

AbstractThe newly‐developed protocol provided a competitive synthetic approach to aryl thiocyanates that tolerates a broad range of reactive functional groups and strong electron‐withdrawing groups.
ChemInform Abstract: mCPBA‐Mediated Conjugation of Dibenzosuberenone and Amines or Carboxylic Acids.
Authors: Chang Meng‐Yang , Tsai Chung‐Yu , Chan Chieh‐Kai 
Published: May 2015

AbstractMCPBA‐mediated condensation of dibenzosuberenone (I) and different 1,2‐diaminobenzenes (II) or carboxylic acids (IV) results in the one‐pot synthesis of polycyclic products (III) and β‐hydroxyesters (V), respectively.
ChemInform Abstract: Gold‐Catalyzed Spiro‐N,O‐ketal Synthesis.
Authors: Grammatikopoulou M. , Thysiadis S. , Sarli V. 
Published: May 2015

AbstractThe synthesis of a variety of spiro‐N,O‐ketals with 5‐ and 6‐membered rings is described via a Au‐catalyzed spiroamidoketalization of alkynyl amidoalcohols under mild conditions.
ChemInform Abstract: Asymmetric Synthesis of 3,3′‐Spirooxindoles Fused with Cyclobutanes Through Organocatalytic Formal [2 + 2] Cycloadditions under H‐Bond‐Directing Dienamine Activation.
Authors: Qi Liang‐Wen , Yang Yu , Gui Yong‐Yuan , Zhang Yong , Chen Feng , Tian Fang , Peng Lin , Wang Li‐Xin 
Published: May 2015

AbstractTitle compounds (III), which possess four contiguous stereocenters, including one spiro quaternary center, are obtained in good yields with excellent regio‐ and stereoselectivity via reaction of ethyleneindolinones (I) with α,β‐unsaturated aldehydes (II).
ChemInform Abstract: Stereoselective Preparation of Spiro[4.4] Cyclic Compounds by the Photochemical Activation of Oxazoles.
Authors: Arai Noriyoshi , Mizota Moe , Ohkuma Takeshi 
Published: May 2015

AbstractA new method for the construction of unique spirocyclic frameworks by the irradiation of oxazole derivatives with an alkene moiety is reported.
ChemInform Abstract: Palladium‐Catalyzed Asymmetric Cycloadditions of Vinylcyclopropanes and in situ Formed Unsaturated Imines: Construction of Structurally and Optically Enriched Spiroindolenines.
Authors: Liu Ze‐Shui , Li Wen‐Ke , Kang Tai‐Ran , He Long , Liu Quan‐Zhong 
Published: May 2015

AbstractThe unsaturated imines, involved in the title [3+2] cycloadditions, are generated in situ from aryl sulfonyl indoles [(I) and (IV)].
ChemInform Abstract: Asymmetric Synthesis of 2,3‐Dihydropyrroles by Ring‐Opening/Cyclization of Cyclopropyl Ketones Using Primary Amines.
Authors: Xia Yong , Liu Xiaohua , Zheng Haifeng , Lin Lili , Feng Xiaoming 
Published: May 2015

AbstractThe asymmetric ring‐opening/cyclization of cyclopropyl ketones with primary amine nucleophiles is catalyzed by a chiral N,N′‐dioxide/scandium(III) complex through a kinetic resolution process.
ChemInform Abstract: Selective N‐Alkylation of Indoles with Primary Alcohols Using a Pt/HBEA Catalyst.
Authors: Siddiki S. M. A. Hakim , Kon Kenichi , Shimizu Ken‐ichi 
Published: May 2015

AbstractN‐Alkylated indoles [(III) and (V)] are regioselectively synthesized by using Pt‐loaded H+‐exchanged BEA zeolite as catalyst.
ChemInform Abstract: Enantioselective Construction of Vicinal Tetrasubstituted Stereocenters by the Mannich Reaction of Silyl Ketene Imines with Isatin‐Derived Ketimines.
Authors: Zhao Jiannan , Fang Bing , Luo Weiwei , Hao Xiaoyu , Liu Xiaohua , Lin Lili , Feng Xiaoming 
Published: May 2015

AbstractA highly enantioselective Mannich reaction of silyl ketene imines with isatin‐derived ketimines is realized by using a chiral N,N′‐dioxide/ZnII catalyst.
ChemInform Abstract: Organocatalytic Enantioselective Addition of Thiols to Ketimines Derived from Isatins.
Authors: Nakamura Shuichi , Takahashi Shun , Nakane Daisuke , Masuda Hideki 
Published: May 2015

AbstractA cinchona alkaloid sulfonamide is used for the title reaction and both enantiomers of the products can be obtained by using pseudoenantiomeric chiral catalyst.
ChemInform Abstract: Highly Enantioselective Synthesis of 2,3‐Dihydro‐1H‐imidazo[2,1‐a]isoindol‐5(9bH)‐ones via Catalytic Asymmetric Intramolecular Cascade Imidization—Nucleophilic Addition—Lactamization.
Authors: Qiu Liqin , et al.  
Published: May 2015

AbstractThe first efficient preparation of the medicinally relevant title compounds is presented starting from substituted methyl 2‐formylbenzoates.
ChemInform Abstract: Reaction of Hydrazones Derived from Active Methylene Compounds with Vilsmeier—Haack Reagent.
Authors: Ivonin Sergey P. , Kurpil' Bohdan B. , Grygorenko Oleksandr O. , Volochnyuk Dmitry M. 
Published: May 2015

AbstractHydrazones with sulfone, ester, nitrile, triphenylphosphonium, and phthalimide moieties are evaluated.
ChemInform Abstract: Significant Facilitation of Metal‐Free Aerobic Oxidative Cyclization of Imines with Water in Synthesis of Benzimidazoles.
Authors: Lee Ye‐Sol , Cho Yeon‐Ho , Lee SeungJae , Bin Jong‐Kwan , Yang JoongHwan , Chae GeeSung , Cheon Cheol‐Hong 
Published: May 2015

AbstractVarious benzimidazoles (26 examples) are obtained by a simple, convenient, and environmentally benign synthesis from ortho‐phenylenediamines and aldehydes via aerobic oxidation in wet organic solvents.
ChemInform Abstract: Synthesis of 2‐Aminothiazole Derivatives from Easily Available Thiourea and Alkyl/Aryl Ketones Using Aqueous NaICl2.
Authors: Ghodse Shrikant M. , Telvekar Vikas N. 
Published: May 2015

AbstractThe facile method proceeds under metal free conditions and provides 2‐aminothiazoles in good to excellent yields.
ChemInform Abstract: Eosin Y Catalyzed Visible Light Mediated Aerobic Photo‐Oxidative Cleavage of the C—C Double Bond of Styrenes.
Authors: Singh Atul K. , Chawla Ruchi , Yadav Lal Dhar S. 
Published: May 2015

AbstractThe efficient and environmentally benign method is applied in the sequential one‐pot synthesis of 2‐phenyl‐2,3‐dihydro[d]thiazole.
ChemInform Abstract: Synthesis, Characterization, and Pharmacological Evaluation of Some Novel Thiadiazoles and Thiazoles Incorporating Pyrazole Moiety as Anticancer Agents.
Authors: Gomha Sobhi M. , Salah Taher A. , Abdelhamid Abdou O. 
Published: May 2015

AbstractA variety of the title compounds (III) and (IV), resp., are synthesized and screened for their in vitro antitumor activities against HCF‐7.
ChemInform Abstract: Rh(III)‐Catalyzed Oxidative Coupling of Benzoic Acids with Geminal‐Substituted Vinyl Acetates: Synthesis of 3‐Substituted Isocoumarins.
Authors: Zhang Mingliang , Zhang Hui‐Jun , Han Tiantian , Ruan Wenqing , Wen Ting‐Bin 
Published: May 2015

AbstractBoth 3‐aryl and 3‐alkyl substituted isocoumarins are synthesized by a Rh(III)‐catalyzed C—H activation/annulation reaction of electron‐rich germinal‐substituted vinyl acetates and arylcarboxylic acids.
ChemInform Abstract: Preparation of 3‐Acyl‐4‐arylcoumarins via Metal‐Free Tandem Oxidative Acylation/Cyclization Between Alkynoates with Aldehydes.
Authors: Mi Xia , Wang Chenyang , Huang Mengmeng , Wu Yusheng , Wu Yangjie 
Published: May 2015

AbstractA novel approach for the preparation of potentially biologically attractive 3‐acyl‐4‐arylcoumarins using readily prepared aryl alkynoates and simple aldehydes as starting materials is developed.
ChemInform Abstract: Diacylation of Coumarins by Silver‐Catalyzed Decarboxylative Cross‐Coupling.
Authors: Wang Hua , Zhou Shi‐Liu , Guo Li‐Na , Duan Xin‐Hua 
Published: May 2015

AbstractA direct acylation of coumarins by silver‐catalyzed decarboxylative cross‐coupling reactions is developed.
ChemInform Abstract: Zirconium Dodecylphosphonate Promoted Synthesis of Xanthene Derivatives by Condensation Reaction of Aldehydes and β‐Naphthol or Dimedone in Green Media.
Authors: Ghassamipour Soheila , Ghashghaei Razieh 
Published: May 2015

AbstractZirconium dodecylphosphonate is found to be an efficient catalyst for the simple and easy synthesis of a wide range of substituted benzoxanthenes and 1,8‐octahydroxanthenes under mild and environmentally benign reaction conditions.
ChemInform Abstract: Hypervalent Iodine(III)‐Mediated C(sp3)H Bond Arylation, Alkylation, and Amidation of Isothiochroman.
Authors: Muramatsu Wataru , Nakano Kimihiro 
Published: May 2015

AbstractIsothiochroman and related compounds undergo sequential oxidation/nucleophilic addition reaction using Grignard reagents to form the corresponding C1‐arylated and alkylated products.