bluuebunny/crossref_metadata_2025_split huggingface dataset:
Radical Chlorination with Hypervalent Iodine(III) Generated by Ligand Exchange: Revisiting Palladium(II)‐Catalyzed Directed CH Chlorination
Authors: Kang Kyungjun , Lee Suyeon , Kim Hyunwoo 
Published: December 2014

AbstractA simple protocol to generate radical chlorine species by ligand exchange in hypervalent iodine(III) compounds is reported. Radical chlorine species, not electrophilic chlorine species, are required for Pd‐catalyzed directed CH chlorination and ammonium salts can be used as radical chlorine sources.
Inverse Kinetic Solvent Isotope Effect in TiO2 Photocatalytic Dehalogenation of Non‐adsorbable Aromatic Halides: A Proton‐Induced Pathway
Authors: Chang Wei , Sun Chunyan , Pang Xibin , Sheng Hua , Li Yue , Ji Hongwei , Song Wenjing , Chen Chuncheng , Ma Wanhong , Zhao Jincai 
Published: December 2014

AbstractAn efficient redox reaction between organic substrates in solution and photoinduced h+vb/e−cb on the surface of photocatalysts requires the substrates or solvent to be adsorbed onto the surface, and is consequentially marked by a normal kinetic solvent isotope effect (KSIE≥1). Reported herein is a universal inverse KSIE (0.6–0.8 at 298 K) for the reductive dehalogenation of aromatic halides which cannot adsorb onto TiO2 in a [D0]methanol/[D4]methanol solution. Combined with in situ ATR‐FTIR spectroscopy investigations, a previously unknown pathway for the transformation of these aromatic halides in TiO2 photocatalysis was identified: a proton adduct intermediate, induced by released H+/D+ from solvent oxidation, accompanies a change in hybridization from sp2 to sp3 at a carbon atom of the aromatic halides. The protonation event leads these aromatic halides to adsorb onto the TiO2 surface and an ET reaction to form dehalogenated products follows.
A Ferromagnetically Coupled (S=1) Peroxodicopper(II) Complex
Authors: Kindermann Nicole , Bill Eckhard , Dechert Sebastian , Demeshko Serhiy , Reijerse Edward J. , Meyer Franc 
Published: December 2014

AbstractCopper enzymes play important roles in the binding and activation of dioxygen in biological systems. Key copper/dioxygen intermediates have been identified and studied in synthetic analogues of the metalloprotein active sites, including the μ‐η2:η2‐peroxodicopper(II) motif relevant to type III dicopper proteins. Herein, we report the synthesis and characterization of a bioinspired dicopper system that forms a stable μ‐η1:η1‐peroxo complex whose Cu‐O‐O‐Cu torsion is constrained to around 90° by ligand design. This results in sizeable ferromagnetic coupling between the copper(II) ions, which is detected by magnetic measurements and HF‐EPR spectroscopy. The new dicopper peroxo system is the first with a triplet ground state, and it represents a snapshot of the initial stages of O2 binding at type III dicopper sites.
Acyl‐Chain Elongation Drives Ketosynthase Substrate Selectivity in trans‐Acyltransferase Polyketide Synthases
Authors: Jenner Matthew , Afonso José Pedro , Bailey Hannah R. , Frank Sarah , Kampa Annette , Piel Jörn , Oldham Neil J. 
Published: December 2014

AbstractType I modular polyketide synthases (PKSs), which are responsible for the biosynthesis of many biologically active agents, possess a ketosynthase (KS) domain within each module to catalyze chain elongation. Acylation of the KS active site Cys residue is followed by transfer to malonyl‐ACP to yield an extended β‐ketoacyl chain (ACP=acyl carrier protein). To date, the precise contribution of KS selectivity in controlling product fidelity has been unclear. Six KS domains from trans‐acyltransferase (trans‐AT) PKSs were subjected to a mass spectrometry based elongation assay, and higher substrate selectivity was identified for the elongating step than in preceding acylation. A close correspondence between the observed KS selectivity and that predicted by phylogenetic analysis was seen. These findings provide insights into the mechanism of KS selectivity in this important group of PKSs, can serve as guidance for engineering, and show that targeted mutagenesis can be used to expand the repertoire of acceptable substrates.
Liquid‐Phase Epitaxial Growth of Two‐Dimensional Semiconductor Hetero‐nanostructures
Authors: Tan Chaoliang , Zeng Zhiyuan , Huang Xiao , Rui Xianhong , Wu Xue‐Jun , Li Bing , Luo Zhimin , Chen Junze , Chen Bo , Yan Qingyu , Zhang Hua 
Published: December 2014

AbstractAlthough many two‐dimensional (2D) hybrid nanostructures are being prepared, the engineering of epitaxial 2D semiconductor hetero‐nanostructures in the liquid phase still remains a challenge. The preparation of 2D semiconductor hetero‐nanostructures by epitaxial growth of metal sulfide nanocrystals, including CuS, ZnS and Ni3S2, is achieved on ultrathin TiS2 nanosheets by a simple electrochemical approach by using the TiS2 crystal and metal foils. Ultrathin CuS nanoplates that are 50–120 nm in size and have a triangular/hexagonal shape are epitaxially grown on TiS2 nanosheets with perfect epitaxial alignment. ZnS and Ni3S2 nanoplates can be also epitaxially grown on TiS2 nanosheets. As a proof‐of‐concept application, the obtained 2D CuS–TiS2 composite is used as the anode in a lithium ion battery, which exhibits a high capacity and excellent cycling stability.
Microscopic, structural, and electrical characterization of the carbonaceous materials synthesized from various lignin feedstocks
Authors: Vivekanandhan Singaravelu , Misra Manjusri , Mohanty Amar Kumar 
Published: December 2014

ABSTRACTMicroscopic, structural and electrical characterization of the carbonaceous materials synthesized from different types of lignin precursors are investigated employing scanning electron microcopy (SEM), Raman spectroscopy, X‐ray diffraction, and AC conductivity techniques. Lignin precursors from various resources carbonized at 900°C for 6 h under nitrogen atmosphere are used for this study. SEM analysis indicates formation of various microstructures, which are highly influenced by the carbonization behavior of lignin feedstocks that varies with chemical composition as well as purity. Raman spectroscopy of the carbon materials shows significant variations of its features, which represents their unique carbonization behaviors and graphitization events. Clear understanding of peak intensity, shape, and area gave very different structural features influenced by their chemical environment of the chosen precursor lignins. Phase purity and the graphitization degree are investigated through their X‐ray diffraction patterns. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41786.
Design of an antibacterial gelatin based on a covalent protein–protein coupling
Authors: Lequeux Isabelle , Ducasse Emmanuel , Jouenne Thierry , Thebault Pascal 
Published: December 2014

ABSTRACTAn antibacterial peptide (AMP), i.e., nisin, was covalently bound to gelatin through a protein–protein coupling. Various reaction conditions were tested to study and optimize parameters of grafting e.g., orientation and density of AMP, which could impact the final antibacterial activity of the modified biopolymer. Modification was investigated by Fourier transform infrared (FT‐IR) spectroscopy and zeta potential. The antibacterial activity of the nisin‐enriched gelatin was evaluated against two staphylococci bacterial strains, i.e., Staphylococus epidermidis and Staphylococcus aureus. A higher activity was found for gelatin modified at pH = 7.4 revealing an influence of the nisin orientation on the protein antibacterial property. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41825.
Redescription of the Hyoid Apparatus and Associated Musculature in the Extant CoelacanthLatimeria chalumnae: Functional Implications for Feeding
Authors: Dutel Hugo , Herrel Anthony , Clément Gaël , Herbin Marc 
Published: December 2014

ABSTRACTThe coelacanthLatimeriais the only extant vertebrate in which the neurocranium is divided into an anterior and a posterior portion which articulate by means of an intracranial joint. This articulation is thought to allow an elevation of the snout up to 20‐degree angle, which is supposed to enhance mouth gape and velocity, in turn allowing for a powerful suction. Several functional models have been proposed to explain the skull movement inLatimeria, but they disagree on the mechanisms responsible for mandibular depression and intracranial elevation, and more precisely on the role and mobility of the hyoid apparatus during these processes. We here show that the m. coracomandibularis spans ventrally to the palate‐mandible joint, and is likely involved in mandibular depression. The hyoid apparatus is sheathed by several layers of ligaments, rendering extensive movements of the hyoid bones in the anteroposterior direction unlikely. Together with the manipulation of the 3D virtual model of the skull, these observations suggest that the hyoid arch is less mobile than previously proposed, and that the movements proposed in previous models are unlikely. In the light of our new observations, we suggest that the mechanisms proposed for explaining the intracranial elevation are incomplete. Moreover, we suggest that the extensive movements of the hyoid arch elements, which were thought to accompany intracranial elevation, are unlikely. In the absence of intracranial elevation, we propose that the movements of the hyoid mainly take place in the transverse plane, allowing the lateral expansion of the orobranchial chamber. Anat Rec, 298:579–601, 2015. © 2014 Wiley Periodicals, Inc.
Mean signal and response time influences on multivoxel signals of contextual retrieval in the medial temporal lobe
Authors: Reas Emilie T. , Brewer James B. 
Published: December 2014

AbstractIntroductionThe medial temporal lobe supports integrating the “what,” “where,” and “when” of an experience into a unified memory. However, it remains unclear how representations of these contextual features are neurally encoded and distributed across medial temporal lobe subregions.MethodsThis study conducted functional magnetic resonance imaging of the medial temporal lobe, while participants retrieved pair, spatial, and temporal source memories. Multivoxel classifiers were trained to distinguish between retrieval conditions before and after correction for mean signal and response times, to more thoroughly characterize the multivoxel signal associated with memory context.ResultsActivity in perirhinal and parahippocampal cortex dissociated between memory for associated items and memory for their spatiotemporal context, and hippocampal activity was linked to memory for spatial context. However, perirhinal and hippocampal classifiers were, respectively, driven by effects of mean signal amplitude and task difficulty, whereas the parahippocampal classifier survived correction for these effects.ConclusionThese findings demonstrate dissociable coding mechanisms for episodic memory context across the medial temporal lobe, and further highlight a critical distinction between multivoxel representations driven by spatially distributed activity patterns, and those driven by the regional signal.
Whither platelets after TAVR?
Authors: Block Peter C. 
Published: December 2014

Key Points

Thrombocytopenia after transcatheter aortic valve replacement (TAVR) is common and usually reaches 50–60% below baseline platelet levels.
Adverse sequelae are rare but persistent thrombocytopenia is associated with increased mortality.
Further studies identifying patients with comorbidities that lead to persistent thrombocytopenia and higher mortality might help identify patients with limited benefit from TAVR.
Bleeding that BARCs may bite…
Authors: Belardi Jorge A. , Albertal Mariano 
Published: December 2014

Key Points

The presence of major bleeding according to a standardized bleeding classification [Bleeding Academic Research Consortium (BARC)] is associated with increased risk of major adverse cardiac events and death.
BARC predictive power is similar to the bleeding Thrombolysis in Myocardial Infarction criteria.
The use of BARC in clinical trials and international registries will enable comparison of bleeding rates between studies.
ChemInform Abstract: ScFe5P3, ScRu6P4, U2Mo30P19, and Other Ternary Phosphides with a Metal to Phosphorus Ratio Close to 2:1.
Authors: Jeitschko Wolfgang , Albering Joerg H. , Brink Reinhold , Jakubowski‐Ripke Ursula , Reinbold Elke J. 
Published: December 2014

AbstractThe new ternary phosphides ScFe5P3 (I), Sc(Ta0.18Fe0.82)Fe4P3 (II), ZrFe5P3 (III), ScRu6P4 (IV), ErRu6P4 (V), ZrCr6P4 (VI), Nd2Ru12P7 (VII), and U2Mo30P19 (VIII) are prepared from mixtures of the elements in most cases with elemental Sn as a flux (alumina crucibles, 650—950 °C, 7—10 d).
ChemInform Abstract: Synthesis and Crystal Structure of δ‐TaON, a Metastable Polymorph of Tantalum Oxide Nitride.
Authors: Luedtke Tobias , Schmidt Alexander , Goebel Caren , Fischer Anna , Becker Nils , Reimann Christoph , Bredow Thomas , Dronskowski Richard , Lerch Martin 
Published: December 2014

Abstractδ‐TaON is prepared by ammonolysis of amorphous Ta2O5 precursor derived via a modified Pechini route (NH3 stream, 760 °C, 1 h; 43% yield).
ChemInform Abstract: Thermoelectrical Properties of Lutetium‐Doped Bi2Te3 Bulk Samples Prepared from Flower‐Like Nanopowders.
Authors: Yang Jingjing , Wu Fang , Zhu Zheng , Yao Lan , Song Hongzhang , Hu Xing 
Published: December 2014

AbstractLuxBi2‐xTe3 (x = 0, 0.1, 0.23, 0.4) nanoflowers are prepared by hydrothermal treatment of LuCl3, BiCl3, and Te with NaBH4 as reductant and EDTA as complexing agent (autoclave, 433 K, 24 h).
ChemInform Abstract: Synthesis and Characterization of F‐Doped Nanocrystalline Li4Ti5O12/C Compounds for Lithium‐Ion Batteries.
Authors: Han Xiaona , Zhao Zhen , Xu Yunlong , Liu Dong , Zhang Huang , Zhao Chongjun 
Published: December 2014

AbstractF‐doped and carbon coated Li4Ti5O11.7F0.3/C composite anode materials are synthesized by solid state reactions of ball milled mixtures of Li2CO3, TiO2, lithium citrate, and LiF (800 °C, 12 h).
ChemInform Abstract: Prussian Blues a a Cathode Material for Lithium Ion Batteries.
Authors: Shen Lian , Wang Zhaoxiang , Chen Liquan 
Published: December 2014

AbstractThe electrochemical performances of Fe4[Fe(CN)6]3 and FeFe(CN)6 (obtained by coprecipitation methods) as cathode materials for lithium ion batteries are evaluated.
ChemInform Abstract: Fe4[Fe(CN)6]3: A Cathode Material for Sodium‐Ion Batteries.
Authors: Sun He , Sun Haobo , Wang Wei , Jiao Handong , Jiao Shuqiang 
Published: December 2014

AbstractThe title compound is synthesized by precipitation from aqueous solutions of FeCl3 and Na4Fe(CN)6 at room temperature and characterized by XRD, SEM, TEM, electrochemical measurements, and first‐principles plane‐wave pseudopotential calculations.
ChemInform Abstract: Excellent Electrochemical Performance of Tin Monosulfide (SnS) as a Sodium‐Ion Battery Anode.
Authors: Dutta Prasit Kumar , Sen Uttam Kumar , Mitra Sagar 
Published: December 2014

AbstractSnS nanorods are synthesized from mixtures of SnCl2 dissolved in acetone and aqueous triethanolamine, thioacetamide, and ammonia solutions (room temperature, 16 h) followed by annealing the obtained precipitate at 500 °C for 5 h under N2 atmosphere.
ChemInform Abstract: Synthesis of Highly Active and Stable Spinel‐Type Oxygen Evolution Electrocatalysts by a Rapid Inorganic Self‐Templating Method.
Authors: Ma Tian Yi , Dai Sheng , Jaroniec Mietek , Qiao Shi Zhang 
Published: December 2014

AbstractThe spinel‐phase metal oxides MnxCo3‐xO4‐δ (x = 0.8, 1.0, 1.2, 1.4) are synthesized by a rapid self‐templating mechanism from EtOH solutions containing CoCl2, MnCl2, KOH, and water (room temperature, sonication).
ChemInform Abstract: Ga2SbCl7O — A Molecular Gallium Antimony Chloride Oxide Synthesized from a GaCl3 Melt.
Authors: Eich Andreas , Schnakenburg Gregor , Beck Johannes 
Published: December 2014

AbstractColorless, highly hygroscopic crystals of the title compound are synthesized from a mixture of Sb, SbCl3, Sb2O3, GaCl3, and Te (glass ampule, Ar, 6 x 10‐2 mbar, 50 °C, 19 d).
ChemInform Abstract: Syntheses, Crystal Structures, Transport Properties, and Theoretical Studies of Five Members of the MAn2Q5 Family: SrU2S5, BaU2Se5, PbU2S5, BaTh2S5, and BaU2Te5.
Authors: Prakash Jai , Tarasenko Mariya S. , Mesbah Adel , Lebegue Sebastien , Malliakas Christos D. , Ibers James A. 
Published: December 2014

AbstractSrU2S5 (I), BaU2Se5 (II), PbU2S5 (III), BaTh2S5 (IV), and BaU2Te5 (V) are prepared by high‐temperature solid‐state reactions of SrS2, Ba, Th, S, Se, Te, Sb2S3 (flux), Pb, CsCl (flux), and depleted U (evacuated silica tubes, complex heating schedules).
ChemInform Abstract: Synthesis and Crystal Structure of the Iron(III) Oxotellurate(IV) Phosphate Oxide Chloride Fe11(TeO3)2(TeO4)3 (PO4)2O4Cl3.
Authors: Zimmermann Iwan , Johnsson Mats 
Published: December 2014

AbstractOrange single crystals of the title compound are obtained from an equimolar mixture of TeO2, FeCl3, FeCl2, Fe2O3, and (NH4)H2PO4 (evacuated silica tube, 550 °C, 70 h).
ChemInform Abstract: Divalent Copper Selenate Complex: Two Types of Octahedral Coordination in the Unit Cell and Disordered 1,4‐Diazabicyclo[2.2.2]octane.
Authors: Rekik Walid , Loulou Nkhili Nouha , Naili Houcine , Dahaoui Slimane 
Published: December 2014

AbstractSingle crystals of the new compound (H2dabco)[Cu(H2O)6] [Cu(SeO4)2(H2O)4]2 are prepared in good yield (not given) from aqueous solutions of CuCO3·2Cu(OH)2, DABCO, and H2SeO4 in the molar ratio of 1:1:2 at room temperature.
ChemInform Abstract: Time‐Resolved Assembly of Cluster‐in‐Cluster {Ag12}‐in‐{W76} Polyoxometalates under Supramolecular Control.
Authors: Zhan Caihong , Cameron Jamie M. , Gao Jing , Purcell Jamie W. , Long De‐Liang , Cronin Leroy 
Published: December 2014

AbstractCompounds (IV), (V), and (VI) are separated sequentially from the same mother liquor as a function of solvent evaporation time (slow evaporation at room temperature).
ChemInform Abstract: X‐Ray Characterization, Electronic Band Structure, and Thermoelectric Properties of the Cluster Compound Ag2Tl2Mo9Se11.
Authors: Gougeon Patrick , et al. et al. 
Published: December 2014

AbstractSingle crystals of Ag2.25Tl1.75Mo9Se11 are prepared by reaction of an excess of Ag powder with Tl2Mo9Se11 single crystals in sealed silica tubes at 800 °C during two weeks.
ChemInform Abstract: New Data on Heteroarene Thiocyanation by Anodic Oxidation of NH4SCN. The Processes of Electroinduced Nucleophilic Aromatic Substitution of Hydrogen.
Authors: Kokorekin Vladimir A. , Sigacheva Vera L. , Petrosyan Vladimir A. 
Published: December 2014

AbstractPotentiostatic electrolysis of NH4SCN in an undivided cell is used to perform the anodic thiocyanation of various aromatic substrates under mild conditions.
ChemInform Abstract: Efficient Generation and Increased Reactivity in Cationic Gold via Broensted Acid or Lewis Acid Assisted Activation of an Imidogold Precatalyst.
Authors: Han Junbin , Shimizu Naoto , Lu Zhichao , Amii Hideki , Hammond Gerald B. , Xu Bo 
Published: December 2014

AbstractImido gold precatalysts activated by Broensted or Lewis acids are excellent catalysts applicable for most common gold‐catalyzed reactions.
ChemInform Abstract: Fc‐PIP Catalyzed Asymmetric Synthesis of cis‐2,3‐Dihydrobenzofurans.
Authors: Jiang Shanshan , Hu Bin , Yu Xingxin , Deng Weiping 
Published: December 2014

AbstractThe amidine‐ferrocene hybrid catalyst FPIP, attributed with central and planar chirality, is highly effective and selective in the intramolecular Michael addition‐lactonization tandem reaction of a variety of enone acids to afford the title compounds with good diastereo‐ and excellent enantioselectivities.
ChemInform Abstract: Air‐ and Water‐Tolerant Rare Earth Guanidinium BINOLate Complexes as Practical Precatalysts in Multifunctional Asymmetric Catalysis.
Authors: Robinson Jerome R. , Fan Xinyuan , Yadav Jagjit , Carroll Patrick J. , Wooten Alfred J. , Pericas Miquel A. , Schelter Eric J. , Walsh Patrick J. 
Published: December 2014

AbstractThe usability of the title complexes is shown in several asymmetric and mechanistically diverse reactions including Michael additions, aza‐Michael additions, and direct Aldol reactions.
ChemInform Abstract: Palladium(II)‐Catalyzed Enantioselective C(sp3)—H Activation Using a Chiral Hydroxamic Acid Ligand.
Authors: Xiao Kai‐Jiong , Lin David W. , Miura Motofumi , Zhu Ru‐Yi , Gong Wei , Wasa Masayuki , Yu Jin‐Quan 
Published: December 2014

AbstractThe absolute configurations of compounds (III) and (V) are tentatively assigned in analogy to that of (Vc) which is determined by X‐ray crystallographic analysis.
ChemInform Abstract: Enantiospecific sp2—sp3 Coupling of Secondary and Tertiary Boronic Esters.
Authors: Bonet Amadeu , Odachowski Marcin , Leonori Daniele , Essafi Stephanie , Aggarwal Varinder K. 
Published: December 2014

AbstractFor the first time, a general method for coupling electron‐rich aromatic and heteroaromatic compounds with enantioenriched secondary and tertiary boronic esters is described.
ChemInform Abstract: Enantioselective Hydrogenation of α,β‐Disubstituted Nitroalkenes.
Authors: Li Shengkun , Huang Kexuan , Zhang Xumu 
Published: December 2014

AbstractThe first rhodium‐catalyzed, highly chemo‐ and enantioselective hydrogenation of a variety of α,β‐disubstituted nitroalkenes (I) and (III) is reported.
ChemInform Abstract: Rhodium(II)‐Catalyzed Intramolecular Cycloisomerizations of Methylenecyclopropanes with N‐Sulfonyl 1,2,3‐Triazoles.
Authors: Chen Kai , Zhu Zi‐Zhong , Zhang Yong‐Sheng , Tang Xiang‐Ying , Shi Min 
Published: December 2014

AbstractSeveral intramolecular tandem reactions of methylenecyclopropanes with rhodium(II) azavinyl carbenes are realized.
ChemInform Abstract: β‐(Carbonatoxy)alkyl Radicals: A New Subset of β‐(Ester)alkyl Radical Fragmentation During Copper(I)‐Mediated Synthesis of 1,1‐Dichloro‐1‐alkenes.
Authors: Ram Ram N. , Tittal Ram K. 
Published: December 2014

AbstractTreatment of substrates (I) with CuCl/bipy produces alkenes (II).
ChemInform Abstract: Synthesis of Novel Chiral Diamino Alcohols and Their Application in Copper‐Catalyzed Asymmetric Allylic Oxidation of Cycloolefins.
Authors: Faraji Laleh , Samadi Saadi , Jadidi Khosrow , Notash Behrouz 
Published: December 2014

AbstractA small library of new enantiomerically pure (S,S)‐diamino alcohols are synthesized and applied as chiral ligands in the copper‐catalyzed asymmetric allylic oxidation reaction of cycloolefins.
ChemInform Abstract: Mild Propargylic Oxidation Using a Diacetoxyiodobenzene/tert‐Butyl Hydroperoxide Protocol.
Authors: Zhao Yi , Ng Angela Wan Ting , Yeung Ying‐Yeung 
Published: December 2014

AbstractA mild method is presented for the oxidation of alkynes to α,β‐alkynoic ketones.
ChemInform Abstract: Phosphine‐ and Hydrogen‐Free: Highly Regioselective Ruthenium‐Catalyzed Hydroaminomethylation of Olefins.
Authors: Guelak Samet , Wu Lipeng , Liu Qiang , Franke Robert , Jackstell Ralf , Beller Matthias 
Published: December 2014

AbstractA new, highly regioselective (n:iso up to <99:1) hydrogen‐ and ligand‐free hydroaminomethylation of terminal alkenes is reported.
ChemInform Abstract: Studies on Copper(I)‐Catalyzed Highly Regio‐ and Stereo‐Selective Hydroboration of Alkynamides.
Authors: He Guangke , Chen Shan , Wang Qiang , Huang Hai , Zhang Qijun , Zhang Dongming , Zhang Rong , Zhu Hongjun 
Published: December 2014

AbstractInterestingly, the regioselectivity of the present hydroboration is found to be opposite to that observed in the carbometallation reaction of alkynamides.
ChemInform Abstract: Urea‐Induced Acid Amplification: A New Approach for Metal‐Free Insertion Chemistry.
Authors: Couch Erica D. , Auvil Tyler J. , Mattson Anita E. 
Published: December 2014

AbstractA difluoroboronate substituted urea is shown to be an efficient catalyst for O—H and S—H insertion reactions of α‐aryldiazoacetates to produce a wide variety of α‐acyloxyesters and α‐mercaptoesters, respectively.