bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: L‐Isoleucine Derived Bifunctional Phosphine Catalyses Asymmetric [3 + 2]‐Annulation of Allenyl‐Esters and ‐Ketones with Ketimines
Authors: Sankar Muthukumar G. , Garcia‐Castro Miguel , Golz Christopher , Strohmann Carsten , Kumar Kamal 
Published: October 2016

Abstractaffording a wide range of dihydropyrrolyl spirooxindoles with excellent enantioselectivities
ChemInform Abstract: Cooperative Indium(III)/Silver(I) System for Oxidative Coupling/Annulation of 1,3‐Dicarbonyls and Styrenes: Construction of Five‐Membered Heterocycles.
Authors: Ko Tae Yun , Youn So Won 
Published: October 2016

AbstractA series of dihydrofurans (III), (V), and (XIII) is readily prepared by an indium‐catalyzed reaction of ketones with alkenes in the presence of Ag2O.
ChemInform Abstract: Direct Electrophilic Trifluoromethylthiolation of N‐Benzyl Indoles Using AgSCF3.
Authors: Ma Lan , Cheng Xiu‐Fen , Li Yan , Wang Xi‐Sheng 
Published: October 2016

AbstractThe here presented novel method for the electrophilic trifluoromethylthiolation of N‐benzylindoles uses AgSCF3 directly as the S‐CF3 source.
ChemInform Abstract: Copper‐Catalyzed Synthesis of 1,3,4‐Trisubstituted and 1,3,4,5‐Tetrasubstituted Pyrazoles via [3 + 2] Cycloadditions of Hydrazones and Nitroolefins.
Authors: Shi Chong , Ma Chaowei , Ma Haojie , Zhou Xiaoqiang , Cao Jinhui , Fan Yuxing , Huang Guosheng 
Published: October 2016

AbstractThe procedure tolerates a broad substrate scope for both reactants to afford the pharmaceutically interesting pyrazole units in a regioselective manner.
ChemInform Abstract: Microbial Cyclosophoraose as a Catalyst for the Synthesis of Diversified Indolyl 4H‐Chromenes via One‐Pot Three Component Reactions in Water.
Authors: Dindulkar Someshwar D. , Jeong Daham , Cho Eunae , Kim Dongjin , Jung Seunho 
Published: October 2016

AbstractA cyclosophoraose is used as catalyst for the one‐pot three‐component Knoevenagel‐Michael addition‐cyclization reaction to give indolyl‐chromene derivatives.
ChemInform Abstract: An Easy Access to Fused Chromanones via Rhodium Catalyzed Oxidative Coupling of Salicylaldehydes with Heterobicyclic Olefins.
Authors: Vijayan Ajesh , Baiju T. V. , Jijy E. , Prakash Praveen , Shimi M. , Joseph Nayana , Pihko Petri M. , Varughese Sunil , Radhakrishnan K. V. 
Published: October 2016

AbstractDiazabicyclic and urea‐derived bicyclic olefins react with salicylaldehydes to produce various types of fused chromanone systems of biological interest in a single step (mechanism).
ChemInform Abstract: Synthesis of 6‐Alkyl‐6H‐benzo[c]chromene Derivatives by Cyclization/Selective Ether Cleavage in One Pot: Total Synthesis of Cannabinol.
Authors: Norseeda Krissada , Tummatorn Jumreang , Krajangsri Suppachai , Thongsornkleeb Charnsak , Ruchirawat Somsak 
Published: October 2016

AbstractPBr3‐mediated cyclization reactions of 1‐(2′‐alkoxybiaryl)alkanol derivatives provide access to the synthesis of a wide range of benzochromene derivatives including cannabiol precursor (VIII) in high yields.
ChemInform Abstract: Enantioselective Synthesis of 2‐Amino‐4‐(nitromethyl)‐4H‐chromene‐3‐carbonitriles from 2‐Iminochromenes.
Authors: Koz Gamze , Koz Omer , Coskun Necdet 
Published: October 2016

AbstractA series of medicinally important title compounds are synthesized using enantioselective conjugate addition of nitromethane to iminochromenes.
ChemInform Abstract: Simple Broensted Acid Catalyzed C—H Functionalization: Efficient Access to Poly‐Substituted Pyridines.
Authors: Lai Shujun , Ren Xuwen , Zhao Jinzhong , Tang Zhuo , Li Guangxun 
Published: October 2016

AbstractAn efficient, convenient, and environmentally benign protocol for preparation of various polysubstituted pyridines under mild reaction conditions is described.
ChemInform Abstract: Pd‐Catalyzed Sequential β‐C(sp3)—H Arylation and Intramolecular Amination of δ‐C(sp2)—H Bonds for Synthesis of Quinolinones via an N,O‐Bidentate Directing Group.
Authors: Guan Mingyu , Pang Yubo , Zhang Jingyu , Zhao Yingsheng 
Published: October 2016

AbstractAn effective procedure for the synthesis of 2‐quinolinone derivatives by palladium‐catalyzed sequential β‐C(sp3)—H arylation and selective intramolecular C(sp2)—H/N—H amination starting with aryl iodides and carboxylic acids is reported.
ChemInform Abstract: One‐Step Synthetic Access to Isosteric and Potent Anticancer Nitrogen Heterocycles with the Benzo[c]phenanthridine Scaffold.
Authors: Steinhauer Tamara N. , Girreser Ulrich , Meier Christopher , Cushman Mark , Clement Bernd 
Published: October 2016

AbstractTreatment of substrates (I), (IV) and (VIII) with various aromatic aldehydes allows the access to a library of new tetracyclic heterocycles which can be further functionalized.
ChemInform Abstract: Formal [4 + 2] Cycloaddition of Quinolines, Pyridines, and Isoquinolines with 3‐Ethoxycyclobutanones.
Authors: Onnagawa Tatsuo , Shima Yusuke , Yoshimura Tomoyuki , Matsuo Jun‐ichi 
Published: October 2016

AbstractThe first example of a formal [4 + 2] cycloaddition of 3‐ethoxycyclobutanones with quinolines, pyridines, and isoquinolines to give 9a‐hydro‐2H‐quinolizin‐2‐ one derivatives is reported.
ChemInform Abstract: A Reaction of 1,2‐Diamines and Aldehydes with Silyl Cyanide as Cyanide Pronucleophile to Access 2‐Aminopyrazines and 2‐Aminoquinoxalines.
Authors: Guchhait Sankar K. , Priyadarshani Garima , Gulghane Nikhil M. 
Published: October 2016

AbstractThe reaction proceeds through a tandem sequence of desilylation followed by Strecker reaction, amide‐forming cyclization and dehydrogenative aromatization.
ChemInform Abstract: With DBU‐Activated N‐Bromophthalimide as Potential N‐Sources to Achieve P—N Cross‐Coupling of P(O)—H Compounds.
Authors: Li Yueju , Liang Fushun 
Published: October 2016

AbstractThis facile method features broad phosphorous compound scope and provides phosphoramidates under mild conditions and in short reaction time.
ChemInform Abstract: New Cytotoxic and Antiinflammatory Steroids from the Soft Coral Klyxum flaccidum.
Authors: Tseng Wan‐Ru , Huang Chiung‐Yao , Tsai Yi‐Ying , Lin Yun‐Sheng , Hwang Tsong‐Long , Su Jui‐Hsin , Sung Ping‐Jyun , Dai Chang‐Feng , Sheu Jyh‐Horng 
Published: October 2016

AbstractFour new steroids, klyflaccisteroids G—J, are isolated and evaluated for their biological activity.
ChemInform Abstract: 3‐Butenyloxycarbonyl as a New Hydroxyl Protecting Group in Carbohydrate Synthesis.
Authors: Zeng Nana , Niu Youhong , Ye Xin‐Shan 
Published: October 2016

AbstractThe 3‐butenyloxycarbonyl group can be introduced into carbohydrates such as (I) under mild conditions.
ChemInform Abstract: An Efficient Method for the Stereoselective Synthesis of N‐Substituted Trihydroxypiperidine Derivatives Promoted by p‐TsOH.
Authors: Yuan Wen , Xia Jianhui , Zhang Xiaoke , Liang Peng , Zhang Jichao , Jiao Wei , Shao Huawu 
Published: October 2016

AbstractTreatment of the pentose derivatives (I) and (V) with amines and ketones is carried out in the presence of TosOH to produce N‐substituted iminosugar C‐glycosides as potential glucosidase inhibitors.
ChemInform Abstract: Asymmetric Total Syntheses of the trans‐2‐Aryl‐6‐alkyltetrahydropyrans Diospongin B and Parvistones D and E from a Common Precursor.
Authors: Li Zhilong , Tong Rongbiao 
Published: October 2016

AbstractThe strategy of the asymmetric total synthesis features a high‐yielding three‐step reaction sequence: Achmatowicz rearrangement, reductive γ‐deoxygenation, and Matsuda—Heck coupling to construct the rare and challenging trans‐2‐aryl‐6‐alkyltetrahydropyrans, which serve as common intermediates for the syntheses of diospongin B (I), and parvistones D (II) and E (III).
ChemInform Abstract: Synthesis and Characterization of the Lead Borate Pb6B12O21(OH)6.
Authors: Schoenegger Sandra , Ortner Teresa S. , Wurst Klaus , Heymann Gunter , Huppertz Hubert 
Published: October 2016

AbstractThe new title compound is synthesized by hydrothermal reaction of Pb(BO3)2, KNO3, H2O, and KOH (autoclave, 513 K, 3 d).
ChemInform Abstract: Nickel‐Catalyzed Intramolecular C—O Bond Formation: Synthesis of Cyclic Enol Ethers.
Authors: Han Seo‐Jung , Doi Ryohei , Stoltz Brian M. 
Published: October 2016

AbstractA simple procedure is elaborated for the preparation of cyclic enol ethers by Ni‐catalyzed cyclization of halogenated alcohols.
ChemInform Abstract: Preparation of trans‐2‐Substituted‐4‐halopiperidines and cis‐2‐Substituted‐4‐halotetrahydropyrans via AlCl3‐Catalyzed Prins Reaction.
Authors: Liu Gong‐Qing , Cui Bin , Xu Rong , Li Yue‐Ming 
Published: October 2016

AbstractWhereas the title reaction between N‐tosyl homoallylamine with aryl or alkyl aldehydes and trimethylsilyl bromide, chloride or iodide delivers the corresponding 2‐substituted 4‐halopiperidines with high trans selectivity, application of trimethylsilyl fluoride provides mixtures of cis and trans isomers.
ChemInform Abstract: Stereoselective Rh‐Catalyzed Hydrogenative Desymmetrization of Achiral Substituted 1,4‐Dienes.
Authors: Fernandez‐Perez Hector , Lao Joan R. , Vidal‐Ferran Anton 
Published: October 2016

AbstractA highly stereoselective desymmetrization of bis‐allylic alcohols is achieved by Rh‐catalyzed hydrogenation in the presence of TADDOL‐derived POP‐compound as optimal ligand.
ChemInform Abstract: Thermal [2 + 2]‐Cycloaddition of Ketenes with Chiral Enol Ethers: Route to Densely Substituted Cyclobutanones.
Authors: Rulliere Pauline , Grisel Julien , Poittevin Clement , Cividino Pascale , Carret Sebastien , Poisson Jean‐Francois 
Published: October 2016

AbstractAn unprecedented [2 + 2] cycloaddition of in situ generated ketenes with 1‐(2,4,6‐triisopropylphenyl)ethyl substituted enol ethers provides a synthesis of cyclobutanones with good to excellent diastereoselectivity.
ChemInform Abstract: Copper‐Modified Titanium Dioxide: A Simple Photocatalyst for the Chemoselective and Diastereoselective Hydrogenation of Alkynes to Alkenes under Additive‐Free Conditions.
Authors: Kominami Hiroshi , Higa Megumi , Nojima Taketo , Ito Tomohiko , Nakanishi Kousuke , Hashimoto Keiji , Imamura Kazuya 
Published: October 2016

AbstractThe reaction proceeds with excellent chemoselectivity and Z‐selectivity.
ChemInform Abstract: Palladium(II)‐Catalyzed Enantioselective Synthesis of α‐(Trifluoromethyl)arylmethylamines.
Authors: Johnson Thomas , Luo Bo , Lautens Mark 
Published: October 2016

AbstractThe enantioselective synthesis of α‐(trifluoromethyl)arylmethylamines succeeds by palladium(II)‐catalyzed addition of arylboroxines to either imines or N,O‐acetals.
ChemInform Abstract: KI‐Catalyzed α‐Acyloxylation of Acetone with Carboxylic Acids.
Authors: Wu Ya‐Dong , Huang Bei , Zhang Yue‐Xin , Wang Xiao‐Xu , Dai Jian‐Jun , Xu Jun , Xu Hua‐Jian 
Published: October 2016

AbstractThe scalable reaction tolerates variously functionalized aryl carboxylic acids as well as alkyl, alkenyl, and alkynyl carboxylic acids.
ChemInform Abstract: α‐Regioselective Aqueous Mukaiyama Aldol Reaction of 2‐(Trimethylsilyloxy)furan with Pyruvates.
Authors: Adamkiewicz Anna , Woyciechowska Marta , Mlynarski Jacek 
Published: October 2016

AbstractA procedure that enables access to α‐(hydroxyalkyl)butenolides from 2‐(trimethylsilyloxy)furan and keto esters with excellent regiocontrol is reported.
ChemInform Abstract: Ligand Free Palladium Catalyzed Synthesis of 3‐Aryl/heteroaryl‐4‐Indolylmaleimide and Its Antimicrobial Activity.
Authors: Sharma Deepak K. , Rajput Vikrant S. , Singh Samsher , Sharma Rashmi , Khan Inshad A. , Mukherjee Debaraj 
Published: October 2016

AbstractA ligand free palladium catalyzed Suzuki coupling of bromo‐indolylmaleimides with arylboronic acids at room temperature furnishes unsymmetrical arylated indolylmaleimide derivatives.
ChemInform Abstract: Stereoselective Synthesis of Thiazino[4,3‐a]indoles Using the Thia‐Pictet—Spengler Reaction of Indoles Bearing N‐Tethered Thiols and Vinylogous Thiocarbonates.
Authors: Gharpure Santosh J. , Nanda Santosh K. 
Published: October 2016

AbstractAn inter‐ as well as intramolecular thia‐Pictet—Spengler cyclization of N‐tethered thiols and vinylogous thiocarbonates is described for the stereoselective synthesis of N‐fused thiazinoindole derivatives.
ChemInform Abstract: Cs2CO3 as a Source of Carbonyl and Ethereal Oxygen in a Cu‐Catalyzed Cascade Synthesis of Benzofuran[3,2‐c]quinolin‐6[5‐H]ones.
Authors: Ali Wajid , Modi Anju , Behera Ahalya , Mohanta Prakash Ranjan , Patel Bhisma K. 
Published: October 2016

AbstractFollowing the efficient title process three types of bonds are concomitantly constructed, namely two C—O one C—C and one C—N bond.
ChemInform Abstract: One‐Step Approach for the Synthesis of Functionalized Quinoxalines Mediated by T3P®—DMSO or T3P® via a Tandem Oxidation—Condensation or Condensation Reaction.
Authors: Harsha Kachigere B. , Rangappa Kanchugarkoppal S. 
Published: October 2016

AbstractA cyclocondensation of 1,2‐phenylenediamines with α‐hydroxy ketones, α‐bromo ketones, or α‐diketones affords quinoxalines under simple and mild reaction conditions.
ChemInform Abstract: Selective Synthesis of Vinyl‐ or Alkynyl Chalcogenides from Glycerol and Their Water‐Soluble Derivatives.
Authors: Soares Liane K. , Silva Rafaela B. , Peglow Thiago J. , Silva Marcio S. , Jacob Raquel G. , Alves Diego , Perin Gelson 
Published: October 2016

AbstractA convenient procedure is disclosed to synthesize new vinyl chalcogenides by reaction of dichalcogenides (Se, Te) with polyethylene glycol 400 as solvent.
ChemInform Abstract: Bifunctional Chiral Dehydroalanines for Peptide Coupling and Stereoselective S‐Michael Addition.
Authors: Gutierrez‐Jimenez Marta I. , Aydillo Carlos , Navo Claudio D. , Avenoza Alberto , Corzana Francisco , Jimenez‐Oses Gonzalo , Zurbano Maria M. , Busto Jesus H. , Peregrina Jesus M. 
Published: October 2016

AbstractThe chiral bicyclic dehydroalanine building block (I) is applied in stereoselective S‐Michael reactions with a variety of thiols.
Modeling the Kinetics of Protein Conjugation Reactions
Authors: Pfister David , Ulmer Nicole , Klaue Antoine , Ingold Oliver , Morbidelli Massimo 
Published: October 2016

AbstractOver the past decades, the pharmaceutical industry has shown a continuous infatuation for therapeutic proteins. In order to constantly improve their efficacy, chemical reactions involving the conjugation of the therapeutic protein with various chemical reagents have been developed. Little efforts have been put forth to simulate the kinetics of protein conjugation and the literature dealing with kinetic models is rather scarce as compared to the abundant references about conjugation reactions in general. In this work, techniques to measure the kinetics of reaction, model the conjugation between add‐on molecules and proteins, and evaluate the model parameters are discussed.
QUANTITATIVE ASSESSMENT OF FREE GAS BENEATH GAS HYDRATE STABILITY ZONE FROM PRESTACK SEISMIC DATA AND ROCK PHYSICS: A CASE OF HOLE NGHP01‐10A, KRISHNA‐GODAVARI BASIN, INDIA
Authors: Jin QIAN , Xiu‐Juan WANG , Dong‐Dong DONG , Shi‐Guo WU , Kalachand SAIN , Yue‐Ming YE 
Published: October 2016

AbstractThe distribution, saturation, and hydrate indicator of free gas beneath gas hydrate stability zone have been the difficulty in the research of gas hydrate. Amplitude versus offset (AVO) and rock physics can be used to quantitatively interpret free gas saturation. In this paper, seismic data, acquired at K‐G basin, India, are processed to preserve true amplitude information. Based on the logging data and horizon calibration, free gas saturation of NGHP01‐10A is assessed with effective medium theory and AVO modeling. It is found that free gas saturation is related to its distribution patterns. Assessments of free gas saturation in homogeneous and patchy distribution are 0.3%∼0.4% and 3%∼4%, respectively. The results show good agreement with the crossplot of Poisson's ratio which are calculated from the measurement at NGHP01‐10D. Free gas is further deduced to be homogeneous distribution on the base of dry frame Poisson's ratio with the saturation of 0.3%∼0.4%.
EDGE DETECTION OF POTENTIAL FIELD DATA USING AN ENHANCED ANALYTIC SIGNAL TILT ANGLE
Authors: Ting‐Jie YAN , Yan‐Gang WU , Yuan YUAN , Ling‐Na CHEN 
Published: October 2016

AbstractEdge detection plays an important role in the interpretation of potential field data. Many traditional methods are employed to outline the edges. However, some of them cannot equalize the amplitude of the edges of shallow and deep geological bodies simultaneously; some of them although can balance the anomaly amplitude, the identified edges include some additional false edge information, especially when the measured anomalies contain both positive and negative anomalies simultaneously. Some methods used to avoid this disadvantage are subjective to some extent. In order to solve these problems, this paper proposed a new method called enhanced analytic sinal tilt angle to identify the edges of geological bodies. The new method is tested with synthetic gravity anomaly, which shows that the new method can not only identify the edges of shallow and deep geological bodies clearly and precisely, also can avoid bringing some additional false edges. Finally, we apply the new method to real measured gravity data in Sichuan basin, China, obtaining good results.
THE APPLICATION OF CEC RATIO METHOD IN THE EVALUATION OF TUFFACEOUS SANDSTONE RESERVOIRS: AN EXAMPLE IN THE X DEPRESSION OF THE HAILAR‐TAMTSAG BASIN
Authors: Bao‐Zhi PAN , Si‐Hui LIU , Bu‐Zhou HUANG , Chun‐Hui FANG , Yu‐Hang GUO 
Published: October 2016

AbstractThe logging evaluations of tuffaceous sandstone reservoirs are always difficult problems. The existence of tuff results in the great variations in reservoir pore structures, and the associated physical properties, which greatly influence the formation parameters. Therefore, the effects of tuff on saturation models cannot be ignored. This study took the tuffaceous sandstone reservoirs in the X depression of the Hailar‐Tamtsag Basin as an example. Based on the differences of the response characteristics between the tuff and shale, the component content was calculated using a method which combined a bacterial foraging algorithm and a particle swarm optimization algorithm. The experimental data of the cation exchange capacity (CEC) proved that the tuff had conductivity. Then, the resistivity of the tuff was obtained using the relationship between the CEC and the resistivity, which was then used to calculate the saturation. Finally, a new method was proposed to calculate the saturation of a tuffaceous sandstone reservoir, and was referred to as a CEC ratio method. The calculation results of this method were found to have a good application effect.
METHOD OF ACQUIRING HIGH QUALITY SURFACE TURBULENT FLUXES OVER THE LOESS PLATEAU
Authors: Guang‐Hui YUAN , Lei ZHANG , Yao LI , Jie‐Ning LIANG 
Published: October 2016

AbstractTo analyze the applicability of double rotation (DR), planar fit (PF) and fetch planar fit (FPF) over complicated terrain, turbulent data from the Semi‐Arid Climate and Environment Observatory of Lanzhou University (SACOL) are used. A parameterization scheme is provided in integral turbulent characteristics (ITC) test for SACOL data. The overall quality after data processing and quality control including sonic temperature correction, coordinate rotations, WPL correction (correction for density fluctuations), stationarity test and ITC test shows that about 45%∼62% of the total data are of high quality for friction velocity (u*), 66%∼68% for sensible heat flux, 62%∼65% for latent heat flux and 52%∼54% for CO2 flux. The proportion of the high quality of u* obtained by DR is 17% higher than PF, while the proportion of high quality data of the latter three kinds of fluxes obtained by PF is 2%∼3% higher than DR. The differences between PF and FPF are mainly in u*. Comparing the three coordinate rotations in the dominant wind direction, DR still obtains the best quality of u*. The use of DR is recommended in the complicated terrain for reducing calculation and improving the data quality.
TEMPORAL AND SPATIAL VARIATIONS OF PLASMA AND NEUTRAL VELOCITIES DURING SUBSTORM PERIODS
Authors: Ding‐Wei LIU , Hui WANG , Tao HUANG , Xue CAO , Ke‐Deng ZHANG 
Published: October 2016

AbstractThis study statistically investigates the temporal and spatial variations of plasma convection velocity (Vy) and thermospheric zonal wind velocity (Uy) in the range of –4 hour (h) and +2 h MLT relative to substorm onsets (MLT onset) with both CHAMP and DMSP (F13, F15) satellites observations from 2001 to 2005. It shows that Vy increase significantly in all MLT sectors and the latitudes of the peak values move equatorward in 1.5 h after substorm onsets. In the subsequent 1.5 h Vy decrease in intensity and the peaks retreat poleward, which shows that the onsets of substorm can enhance the plasma convection velocity dramatically. The relative increase of Vy is largest from –2 h to MLT onset, which indicates that the substorm mainly affects the thermosphere in the westward 0∼2 h MLT sector. Uy increases steadily in 3 hours after substorm onsets, with a 1.5 h delay relative to Vy in response to the substorm onsets.
SLIP MODEL OF THE 2001 KUNLUN MOUNTAIN MS8.1 EARTHQUAKE BY SDM: JOINT INVERSION FROM GPS AND INSAR DATA
Authors: Hong‐Wei TU , Rong‐Jiang WANG , Fa‐Qi DIAO , Yong ZHANG , Yong‐Ge WAN , Ming‐Pei JIN 
Published: October 2016

AbstractFor the 2001 MS8.1 Kunlun earthquake, which was one of the largest events occurred around the Tibet plateau, a large controversy still exists about its rupture detail. In this paper, we invert the co‐seismic GPS and InSAR data for a robust finite‐fault model of the Kunlun earthquake based on a realistic fault geometry buried in a layered earth structure. The inversion is based on the constrained least‐squares principle and realized using the steepest decent method (SDM). The different data sets are weighted according to their variance and spatial coverage. The results show that the slip maximum can reach up to ∼6.9 m and is located at 35.76° N and 93.40° E. The main rupture area is located at the shallow depth above 20 km. The inverted shallow slip agrees with the surface rupture observed by the field survey, and the whole slip pattern appears generally consistent with the results obtained from previous geological and seismic wave studies.