bluuebunny/crossref_metadata_2025 huggingface dataset:
ChemInform Abstract: ORGANOMETALLIC CHEMISTRY. XXIII. SYNTHESIS OF SUBSTITUTED ARENES BY ADDITION OF A NUCLEOPHILE TO AN η6‐ARENE‐η5‐CYCLOPENTADIENYLIRON CATION AND THEN DECOMPLEXATION OF THE METAL
Authors: BOUTONNET J. C. , ROSE E.
Published: April 2016

Auf dem im Formelschema angegebenen Weg werden die Carbonsäuren (V) über die Eisenkomplexe (III) mit der Lithiumverbindung des Propionitrils (IV) hergestellt.
ChemInform Abstract: PREPARATION AND REACTIONS OF PYRIDONES: STERIC AND ELECTRONIC EFFECTS ON CYCLOADDITIONS WITH 2(1H)‐PYRIDONES
Authors: GISBY G. P. , ROYALL S. E. , SAMMES P. G.
Published: April 2016

Die Pyridone (I) reagieren mit Acetylendicarbon‐ säuredimethylester bei 80°C unter Bildung der Addukte (II), die bei höherer Temp. in die entsprechenden Phthalsäureester (III) und das Isocyanat (IV) gespalten werden [die Phthalate (III) werden direkt aus den Pyridonen und dem Dienophil unter Thermolysebedingungen ohne Lösungsmittel erhalten].
ChemInform Abstract: DIELS‐ALDER REACTION OF CYCLOPENTADIENE WITH ACRYLIC ACID DERIVATIVES IN THE HETEROGENEOUS PHASE
Authors: PARLAR H. , BAUMANN R.
Published: April 2016

Die bei der Titelreaktion des Diens (I) mit den Acrylsäurederivaten (II) in homogener Phase erhaltenen Gemische der Isomeren (III) und (IV) ändern fast unabhängig von der Temp. ihre Zusammensetzung von 1 23, I 23 und 2:3 auf 44:47, 3 :94 und 37 260, wenn die Additionsreaktion z.B. auf Al2O3 durchgeführt wird.
ChemInform Abstract: THE SURFACE OF SILICA AS A MEDIUM FOR THE RADICAL AND IONIC DECOMPOSITION OF DIACYL PEROXIDES
Authors: LEFFLER J. E. , BARBAS J. T.
Published: April 2016

Der thermische Zerfall des Peroxids (I) an SiOQ Oberflächen verschiedener Reinheit ergibt über teils ionische, teils radikalische Prozesse (anders als beim Zerfall in Benzol) hauptsächlich die Produkte (II)‐(V), wobei die Adsorption nicht nur die Translation der Radikale, sondern auch ihre innere Rotation behindert, die Reaktion insgesamt jedoch um das 70fache beschleunigt (verglichen mit der Reaktion in Cyclohexan).
ChemInform Abstract: CROSS AND PARALLEL CYCLIZATION‐REARRANGEMENT OF FACE PROXIMATE Π‐2P‐C CATIONS GENERATED IN POLYCYCLIC OLEFINS
Authors: ASTIN K. B. , FLETCHER A. V. , MACKENZIE K. , MILLER A. S. , RATCLIFFE N. M. , FREW A. A. , MUIR K. W.
Published: April 2016

Hydrid‐Reduktion des verbrückten Ketons (I) und nachfolgende Zn‐Debromierung geben die anti/syn‐Alkohole (IIa)+(IIb), deren Mesylate (IIc), (IId) bei der Hydrolyse mit H2SO4 die Cyclisierungsprodukte (IIIa), (IHb) liefern [Röntgenstrukturanalyse des (I[Ia)‐.Reduktionsproduktes (IIIc) (Pbca; Z=8)].
ChemInform Abstract: INTRAMOLECULAR CYCLIZATION REACTIONS IN ALIPHATIC THYMIDINE ANALOGS SERIES
Authors: SKARIC V. , RAZA Z. , SKARIC D.
Published: April 2016

Intramolekulare Cyclisierung des Thyminderivats (Ia) liefert das Pyrimidooxazinon (II) [daneben dasOlefin (III)], während aus dem Derivat (Ib) mit Na‐methylat [über die Intermediärstufe (Va)] das Oxazolopyrimidinon (IVa) und aus dem Derivat (Ic) analog das Mesylat (IVb) [ + Nebenprodukte (Vb) + (Id)] erhalten werden.
ChemInform Abstract: LOW TEMPERATURE GRIGNARD REACTIONS WITH PURE MAGNESIUM SLURRIES. TRAPPING OF CYCLOPROPYLMETHYL AND BENZOCYCLOBUTENYLMETHYL GRIGNARD REAGENTS WITH CARBON DIOXIDE
Authors: KUENDIG E. P. + , PERRET C.
Published: April 2016

Zugabe von Cyclopropylmethylbromid (I) zu einer Mg‐Aufschlämmung bei tiefen Temp. in THF gibt das Grignard‐Reagenz (II), das in situ mit CO2‐Gas bzw. Benzaldehyd zu den Säuren (III) und (IV) bzw. den Alkoholen (V) und (VI) reagiert.
ChemInform Abstract: SYNTHESIS OF PERFLUORO‐2‐ALKYNENITRILES
Authors: HUANG Y. Z. , SHEN Y. , DING W. , ZHENG J.
Published: April 2016

Perfluoralkyl‐säurechloride (II) reagieren mit dem Cyanmethylen‐phosphin (I) zu den Substitutionsprodukten (III), die mit weiterem (I) in die Wittig‐Verbindungen (IV) übergehen und bei der Thermolyse zu Triphenylphosphinoxid (V) und den substituierten Alkinnitrilen (VI) zersetzt werden.
ChemInform Abstract: ENONES WITH STRAINED DOUBLE BONDS. 6. CYCLOADDITIONS THE BICYCLO(5.3.1)UNDECANE AND BICYCLO(4.3.1)DECANE SYSTEMS
Authors: HOUSE H. O. , SIELOFF R. F. , VANDERVEER D.
Published: April 2016

Während das bicyclische ungesättigte Keton (Ia) mit Butadien (II) ein Addukt (III) liefert, reagiert das Homologe (Ib) nicht mit (II).
ChemInform Abstract: PREPARATION AND SYNTHETIC APPLICATION OF 3‐BROMOALLYLTRIMETHYLSILANE AS HYDROXYPROPENYL SYNTHONS
Authors: NISHIYAMA H. , NARIMATSU S. , ITOH K.
Published: April 2016

1‐Brom‐1‐propen (Ia) wird zu (Ib) bromiert und dann über das Trichlorsilan (Ic) in das Trimethylsilylderivat (Id) umgewandelt, das in Gegenwart von katalytischen Mengen an CuI zur Grignardverbindung (II) umgesetzt wird.
ChemInform Abstract: THE EFFECT OF THE α‐CYANO MOIETY IN NEIGHBORING GROUP PARTICIPATION BY THE CYCLOPROPYL GROUP
Authors: GASSMAN P. G. , TALLEY J. J.
Published: April 2016

The Effect of the α‐Cyano Moiety on Neighboring Group Participation by the Cyclopropyl Group.
ChemInform Abstract: FREE‐RADICAL AROMATIC NITROMETHYLATION PROMOTED BY CERIUM(IV)
Authors: KURZ M. E. , NGOVIWATCHAI P.
Published: April 2016

Benzol oder Toluol (I) reagieren mit Nitromethan (II) in Gegenwart von z.B. Cer(IV)‐Salzen oder Mangan(III)‐acetat zu den Nitroverbindungen (III), die beim Erhitzen in Gegenwart von Mn(II)‐acetat zu den Benzaldehyden (IV) führen.
ChemInform Abstract: CYCLOHEXYLATION OF AROMATIC HYDROCARBONS
Authors: NENZ A. , CALDO C. , PANIZZI S. , LUCARELLI P.
Published: April 2016

Beschrieben wird die Kondensation von aromatischen Kohlenwasserstoffen wie Benzol oder Toluol mit Cyclohexanol in Anwesenheit von Katalysatoren wie Titanchloriden bzw. Aluminiumchlorid im Molverhältnis 2:1 :0,25/l,5 bei 20‐50°C und einer Reaktionszeit von 1,5 ‐ 5 h. Die Umsätze steigen mit der Reaktionstemperatur und der Menge an Kondensationsmittel.
ChemInform Abstract: OXIDATIVE DIMERIZATION OF NB‐ACYLTRYPTOPHANS. TOTAL SYNTHESIS AND ABSOLUTE CONFIGURATION OF DITRYPTOPHENALINE
Authors: NAKAGAWA M. , SUGUMI H. , KODATO S. , HINO T.
Published: April 2016

Das aus L‐N‐Methyl‐phenylalanin und L‐Tryptophan zugängliche Piperazindion (I) reagiert mit Thalliumtrifluoracetat in niederer Ausbeute zu einem Dimeren (II), dem Ditryptophenalin, das als Naturstoff aus Aspergillus flavus erhalten werden kann.
ChemInform Abstract: SYNTHESIS WITH TIN TEMPLATES: PREPARATION OF MACROCYCLIC TETRALACTONES
Authors: SHANZER A. , MAYER‐SHOCHET N. , FROLOW F. , RABINOVICH D.
Published: April 2016

Dibutylzinnoxid (I) bildet mit Glykolen wie (II) cyclische Kondensate wie (III).
ChemInform Abstract: BIS(ALK‐4‐ENYL)ZINC COMPOUNDS VIA ADDITION OF ALK‐2‐ENYLZINC TO OLEFINS
Authors: LEHMKUHL H. , DOERING I. + , NEHL H.
Published: April 2016

Die Allylzinkverbindungen (I) reagieren mit Olefinen (II), (IV) und (VI) zu Einschiebungsprodukten wie (III) und (VII), die anschließend zu ungesättigten Kohlenwasserstoffen hydrolysiert werden.
ChemInform Abstract: DODECAMETHYL‐1Λ3,4Λ3‐DIPHOSPHA‐2,3,5,6,7,8‐HEXASTANNABICYCLO(2.2.# 2)OCTANE, A HIGHLY SYMMETRICAL CAGE MOLECULE
Authors: DRAEGER M. + , MATHIASCH B.
Published: April 2016

Die Titelverbindung (I) wird durch Umsetzung von 1,1,2,2‐Tetramethyldistannan mit weißem Phosphor in Ether bei 0°C unter Ar‐ Atmosphäre und Lichtausschluß gebildet.
ChemInform Abstract: RHODIUM CARBONYL CLUSTER CHEMISTRY UNDER HIGH PRESSURES OF CARBON MONOXIDE AND HYDROGEN. 5. SYNTHESIS AND REACTIVITY OF TETRADECA‐μ‐CARBONYLTRIDECACARBONYLPENTADECARHODATE(3‐)
Authors: VIDAL J. L. , SCHOENING R. C.
Published: April 2016

DerCluster (I) wurde durch Auflösung von Acetylacetonatodicarbonylrhodium im Gemisch mit Cs‐benzoat in dem cyclischen Ether 18‐crown‐6 und Erhitzen auf 150°C unter CO mit 70% Ausb. als Salz des Kations [Cs(18‐crown‐6)ca‐,‐5 1 dargestellt.
ChemInform Abstract: Segment Coupling in Peptide Synthesis. Part 2. A Simple Predictive Equation Correlating Racemization and Primary Structure.
Authors: DUNG LE NGUYEN DUNG LE NGUYEN , DORMOY J.‐R. , CASTRO B. , PREVOT D.
Published: April 2016

Eine Gleichung, basierend auf extrathermodynamischen Annahmen, wird vorgeschlagen, die die Voraussage des Epimerisie‐ 162 rungsgrades bei der Kondensation von Peptidsegmenten (Tripeptid‐Modellreaktionen) als Funktion der prim. Struktur gestattet.
ChemInform Abstract: SYNTHESES OF RECYCLIZED MACROLIDE ANTIBIOTICS AND RELATED DERIVATIVES FROM MYCAMINOSYLTYLONOLIDE
Authors: TANAKA A. , WATANABE A. , KOBAYASHI R. , TSUCHIYA T. , UMEZAWA S.
Published: April 2016

Die Titelverbindung (I) wird in einer Reihe einfacher Reaktionen zu den Derivaten (IIa)‐(IId) umgesetzt.
ChemInform Abstract: Some Thermodynamic Aspects of Inorganic Chemistry.
Authors: JOHNSON D. A.
Published: April 2016

Review: Abgehandelt werden: das Ionenmodell, die Alkali‐ und Erdalkalimetalle, Lösungsgleichgewichte und Elektrodenpotentiale, die Chemie der Übergangsmetalle, Bindungsenergien und Nichtmetall‐ Chemie.
ChemInform Abstract: THERMAL STABILITY AND PHASE TRANSITIONS OF THE OXIDES OF ANTIMONY
Authors: GOLUNSKI S. E. , NEVELL T. G. , POPE M. I.
Published: April 2016

Rhombisches Sb2O3 schmilzt beim Erhitzen in N2 reversibel, während kubisches Sb,O3 bei etwa gleichen Temp. eine irreversible Phasenumwandlung zum rhombischen Allotropen erfährt, das dann sofort schmilzt.
ChemInform Abstract: THERMAL DECOMPOSITION OF BARIUM NITRITE HYDRATE
Authors: GALLAGHER P. K.
Published: April 2016

Einkristalle der Titelverbindung enthalten beträchtliche Mengen an freiem Wasser.
ChemInform Abstract: ESR OF MIXED‐LIGAND COMPLEXES OF OXOVANADIUM(IV) WITH DIMETHYLDITHIOARSINATE AS ONE OF THE LIGANDS
Authors: BARATOVA Z. R. , SEMENOV E. V. , SOLOZHENKIN P. M. , PRABHANANDA B. S.
Published: April 2016

Die aufgezeigten Ligandenaustauschreaktionen werden zur Darstellung der Komplexe (III) und (V) verwendet.
ChemInform Abstract: RING OPENING OF AZIRIDINES BY DIFFERENT FLUORINATING REAGENTS: THREE SYNTHETIC ROUTES TO α,β‐FLUORO AMINES WITH DIFFERENT STEREOCHEMICAL PATHWAYS
Authors: ALVERNHE G. M. , ENNAKOUA C. M. , LACOMBE S. M. , LAURENT A. J.
Published: April 2016

In der ausführlichen experimentellen Untersuchung wird die Spaltung zahlreicher Aziridine (I) durch verschiedene Hydrofluorierungsmittel wie HF‐Aminaddukte, wasserfreie Flußsäure oder HF‐Pyridin untersucht.
ChemInform Abstract: PRODUCTS OF THE FRIES REARRANGEMENT OF 4,6,12‐TRIACETOXYFLUORANTHENE
Authors: AZAROV A. S. , SHENBOR M. I. , ZAICHENKO N. L. , CHERKASHIN M. I. , PROSYANIK A. V.
Published: April 2016

4,6,12‐Trihydroxy‐fluoranthene.(I) wird in Gegenwart katalytischer Mengen Perchlorsäure zur Verbindung (II) acetyliert.
ChemInform Abstract: CARBENOID ADDITIONS TO 3,6‐DIHYDRO‐4‐METHYL‐2H‐PYRAN. FORMATION OF STRAINED OXATRICYCLOHEPTANES IN THE LITHIATION OF THE DIBROMOCARBENE ADDUCT
Authors: JENDRALLA H. , PFLAUMBAUM W.
Published: April 2016

Addition von (Ethoxycarbonyl)‐carbenoid [ aus dem Diazoester (II) erzeugt] bzw. der Carbenoid‐ Spezies (IV) bzw. von Dibromcarben (IX) an die Titelverbindung (I) liefert die Produkte (IIIa) [Weiterüberführung in (IIIb)‐(IIId)], (V) + (VIa) + (VIb) + (VII) + (VIII) (Struktur unsicher) bzw. (X).
ChemInform Abstract: BIMOLECULAR THERMAL REACTIONS OF 5‐METHYLENE‐1,3‐CYCLOHEXADIENE (O‐ISOTOLUENE) AND 3‐METHYLENE‐1,4‐CYCLOHEXADIENE (P‐ISOTOLUENE)
Authors: GAJEWSKI J. J. , GORTVA A. M.
Published: April 2016

Während die Pyrolyse des Triens (I) hauptsächlich die Benzylderivate (II) und (III), aber kein Toluol liefert, gehen aus der entsprechenden Reaktion des Isomers (IV) sowohl Toluol (V) als auch die Produkte (VI)‐(VIII) hervor, wobei auf die prim. Bildung sowohl eines Benzyl‐ als auch eines Cyclohexadienylradikals geschlossen wird.
ChemInform Abstract: GAS‐PHASE ION CHEMISTRY OF 5‐METHYLENE‐1,3‐CYCLOHEXADIENE (O‐ISOTOLUENE) AND 3‐METHYLENE‐1,4‐CYCLOHEXADIENE (P‐ISOTOLUENE)
Authors: BARTMESS J. E.
Published: April 2016

Die Titelverbindungen bilden mit MeS′ oder stärkeren Basen die entsprechenden (9l′)‐Anionen; unter Elektronenbeschuß entstehen C7Hä ‐Kationen, die für das p‐Isomer zu 90% als Benzyliumionen vorliegen.
ChemInform Abstract: FREE RADICAL HETEROCYCLIZATION OF UNSATURATED AMINOTHIOLS. I. GENERAL ASPECTS S OF THE FORMATION OF THIAZOLIDINE COMPOUNDS
Authors: KAAFARANI M. , CROZET M. P. , SURZUR J.‐M.
Published: April 2016

Durch (tBu‐O)2 , Bestrahlung oder Azodiisobutyronitril induzierte Cyclisierung "der Allylaminoalkylthiole (I) führt zu den Heterocyclen (II)‐(IV), wobei die Produktverteilung von Temp., Lösungsmittel, Konzentration und Substituenten der Aminothiole (I) sowie vom Initiator der Reaktion beeinflußt wird (Tabellen).
ChemInform Abstract: CATALYTIC HYDROLYSIS OF ESTERS OF P‐NITROPHENOL BOUND BY AMYLOSE IN THE DIMETHYL SULFOXIDE‐WATER MIXED‐SOLVENT SYSTEM
Authors: HUI Y. , WANG S. , JIANG X.
Published: April 2016

Die Hydrolyse der Ester (I) in 50%igem H2O‐DMSO (pH 12.7) wird in Gegenwart von Amylose um den Faktor 4.3‐176 beschleunigt.
ChemInform Abstract: AN UNEXPECTED REACTION BETWEEN EPICHLOROHYDRIN AND AMINES
Authors: MASSIOT G. , LEVY J.
Published: April 2016

Die 3‐Aminoethylindole (Ia)‐(Ie) reagieren mit Epichlorhydrin (II) unter Eliminierung der Amino‐Gruppe zu dem 1‐(Epoxypropyl)‐3‐chlorethyl‐indol (IIIa), das stets im Gemisch mit N‐(2‐Chlor‐3‐hydroxy‐propyl)‐3‐(β‐chlor‐ethyl)‐indol anfällt; die Reaktion von (If) mit (II) verläuft analog zu (IIIb); (Ig) reagiert nicht mit (II).
ChemInform Abstract: SYNTHESIS AND REACTIVITY OF FOUR‐MEMBERED RING COMPOUNDS. PART 16. REARRANGEMENT OF α‐HALO‐ TO α′‐HALOCYCLOBUTANONES, KEY STEP OF A HIGHLY VERSATILE SYNTHESIS OF PYRETHROIDS
Authors: MARTIN P. , GREUTER H. , RIHS G. , WINKLER T. , BELLUS D.
Published: April 2016

α‐Halogenbutanone wie (I), die leicht durch Cycloaddition von Halogenketenen an terminale Olefine zugänglich sind (bekannt), gehen in Gegen‐ 57 wart verschiedener katalytischer Systeme eine stereoselektive cine‐Umlagerung unter Bildung von α‐Halogencyclobutanonen wie (II) ein [analoge Darstellung der Verbindungen (IV)‐(VI)].
ChemInform Abstract: SYNTHESIS AND REACTIVITY OF FOUR‐MEMBERED RING COMPOUNDS. PART 17. SYNTHESES OF (1R)‐CIS‐3‐(2′,2′‐DIHALOVINYL)‐2,2‐DIMETHYLCYCLOPROPANE CARBOXYLIC ACIDS VIA FAVORSKII REARRANGEMENT OF OPTICALLY ACTIVE CYCLOBUTANONES
Authors: GREUTER H. , DINGWALL J. , MARTIN P. , BELLUS D.
Published: April 2016

Die ausgehend von den Komponenten (I) und (II) durch cine‐Umlagerung erhältlichen (bekannte Reaktionen) rac. cis‐Cyclobutanone (IV) werden (über optisch aktive Aminsalze ihrer NaHSO3‐Addukte) in ihre Enantiomeren (V) und (VII) getrennt; (V) läßt sich durch Favorskii‐Umlagerung und HX‐Eliminierung in ′die Titelverbindungen (VI) überführen.
ChemInform Abstract: SULFUR ANALOGUES OF PSYCHOTOMIMETIC AGENTS. MONOTHIO ANALOGS OF MESCALINE AND ISOMESCALINE
Authors: JACOB P. III , SHULGIN A. T.
Published: April 2016

Monothioanaloga von Mescalin (I) und Isomescalin (II) werden dargestellt.
ChemInform Abstract: STEREOCHEMICAL CONTROL OF THE INTERNAL MICHAEL REACTION. A NEW CONSTRUCTION OF TRANS‐HYDRINDAN SYSTEMS
Authors: STORK G. , SHINER C. S. , WINKLER J. D.
Published: April 2016

Der Silylether (I) läßt sich durch Oxidation mit m‐Chlorperbenzoesäure (mClPB) in THF, anschließende Verseifung zum α‐Hydroxyketon und (dessen oxidative Ringöffnung in den Aldehydester (II) umwandeln.
ChemInform Abstract: STRUCTURE AND PROPERTIES OF A STABLE ISOINDOLE. THE DIMETHYL ACETYLENEDICARBOXYLATE ‐1‐(ETHYLTHIO)‐2‐PROPYLISOINDOLE SUBSTITUTION PRODUCT
Authors: SIMONS S. JUN. , AMMON H. L. , DOHERTY R. , JOHNSON D. F.
Published: April 2016

Aus den Isoindolen (I) erhält man mit Acetylendicarbonsäuremethylester (II) die Addukte (III).
ChemInform Abstract: SYNTHESIS OF CANNABICHROMANONE
Authors: CHIODINI L. , DI CIOMMO M. , MERLINI L.
Published: April 2016

Das Chromanon (I) reagiert mit Methylvinylketon (II) in Gegenwart von 1,5‐Diaza‐bicyclo(4.3.0)non‐5‐en (DBN) zu Cannabichromanon (III) und zum Tricyclus (IV), die sich nur durch mehrfache Dickschichtchromatographie voneinander trennen lassen.
ChemInform Abstract: SYNTHESIS AND ANTIHYPERTENSIVE ACTIVITY OF A SERIES OF 8‐SUBSTITUTED 1‐OXA‐3,8‐DIAZASPIRO(4.5)DECAN‐2‐ONES
Authors: CAROON J. M. , CLARK R. D. , KLUGE A. F. , NELSON J. T. , STROSBERG A. M. , UNGER S. H. , MICHEL A. D. , WHITING R. L.
Published: April 2016

Die Spirocyclen (II) werden mit den Bromiden (I) zu den Verbindungen (III) N‐alkyliert.
ChemInform Abstract: Tetrahydropyridines in the Prins Reactions: A Novel 3‐Oxa‐7‐azabicyclo[3.3.1]‐nonane Derivative.
Authors: CASY A. , OGUNGBAMILA F.
Published: April 2016

Das Piperidon (I) ergibt über die Methylpiperidinole (II) ein Gemisch der Tetrahydropyridine (III) und (IV), die mit überschüssigem wäßrigen Formaldehyd zum Oxazabicyclononan (V) cyclisieren.
ChemInform Abstract: DEAMINATION OF 6‐AMINO‐ AND 6‐(ALKYLAMINO)‐9‐ALKYLPURINES AND DEMETHYLATION OF METHYLTHIOPURINES BY SODIUM IN LIQUID AMMONIA
Authors: KOS N. J. , VAN DER PLAS H. C.
Published: April 2016

Bei der Behandlung mit Natrium in ?.
ChemInform Abstract: I Synthesis of N‐Substituted Aminosulphonic Acids and Halogenated Sultams.
Authors: ZEID I. , NADA A. , HAGGAG B. , ISMAIL I.
Published: April 2016

Die Sultone (I) werden mit den Sulfanilamiden (II) zu den Aminosulfonsäuren (III) umgesetzt.
ChemInform Abstract: REARRANGEMENT OF α‐ARYLHYDRAZONO‐2,5‐DIHYDRO‐2‐THIAZOLEACETIC ESTERS UNDER NUCLEOPHILIC ATTACK
Authors: GASTEIGER J. , STRAUSS U. , SCHUBERT U.
Published: April 2016

Die Titelverbindungen (I) werden unter verschiedenen Bedingungen bei Reaktionen mit Nucleophilen in die Thiatriazabicyclooctene (II) umgelagert, die in Lösung im Gleichgewicht mit den Triazinen (III) stehen.
ChemInform Abstract: REACTIONS OF TETRABROMOSELENIUM AND TETRABROMOTELLURIUM WITH BICYCLO(2.2.1)‐2,5‐HEPTADIENE
Authors: MIGALINA YU. V. , LENDEL V. G. , BALOG I. M. , STANINETS V. I.
Published: April 2016

Norbornadien (I) addiert Selentetrabromid (erhältlich aus Selen‐dioxid und konz. HBr) zur tricyclischen Verbindung (II).
ChemInform Abstract: BIS(DIMETHYLAMINE)TETRAKIS(TERT‐BUTYLMERCAPTIDO)DI‐μ‐SULFIDO‐DIMOLYBDENUM(IV# )
Authors: CHISHOLM M. H. , CORNING J. F. , HUFFMAN J. C.
Published: April 2016

Die Reaktion des Mo‐Komplexes (I) mit tert‐Butylthiol liefert den luftempfindlichen, kristallinen Titelkomplex (II), der durch eine ′Einkristall‐Röntgendiffraktionsanalyse charakterisiert wird.
ChemInform Abstract: HYDRIDOALKYL‐ AND HYDRIDOALKENYLIRIDIUM(III) COMPLEXES FORMED IN THE REACTION OF (CARBORANE)IRIDIUM(III) DIHYDRIDES WITH ALKENES AND ALKYNES. 1
Authors: LONGATO B. , BRESADOLA S.
Published: April 2016

Die durch oxidative Addition von molekularem Wasserstoff an (I) isolierten DihydridocarboranyliTidiUmUIÜ‐Komplexe (II) reagieren mit aktivierten Olefinen und Acetylenen wie (III), (VI) und (XI) bei Raumtemp. zu den stabilen, kristallinen Hydridoalkyl‐ und Hydridoalkenyliridium?ll)‐Derivaten (IV), (VII) und (XII).
ChemInform Abstract: CYANINE DYES OF THE PYRIDO(2,1‐A)ISOINDOLE SERIES
Authors: ROMANOV N. N.
Published: April 2016

Bei der photochemischen Cyclisierung des 2‐Brom‐1‐benzyl‐pyridiniumbromids (I) entsteht in bekannter Weise Pyrido‐isoindolium‐salz (II).
ChemInform Abstract: PREPARATION AND ANALGESIC PROPERTIES OF AMINO ACID DERIVATIVES OF (‐)‐5,9α‐DIETHYL‐2′‐HYDROXYBENZOMORPHAN
Authors: BELANGER P. C. , SCHEIGETZ J. , YOUNG R. N. , CHARLESON S. E. , HUDGIN R. L. , ENGELHARDT E. L.
Published: April 2016

Aus der entsprechenden (‐)‐Nor‐Base erhält man durch Umsetzung mit t‐Boc‐Aminosäurederivaten und abschließende Abspaltung der t‐Boc‐ Gruppe mit gasförmigem Chlorwasserstoff in Trichlormethan die Verbindungen (Ia) bis (Ie).
ChemInform Abstract: DIELS‐ALDER ADDUCTS OF 1‐BENZENESULFONYLINDOLE‐2‐ACRYLATES AND 1‐(ALKOXYCARBONYL)‐1,2‐DIHYDROPYRIDINES. INTERMEDIATES FOR SYNTHESIS OF IBOGA ALKALOID ANALOGS
Authors: SUNDBERG R. J. , BLOOM J. D.
Published: April 2016

Pyridin (I) liefert mit Chlorkohlensäurephenylester in Gegenwart von Na‐boranat den 1,2‐Dihydropyridin‐N‐carbonsäureester (IIa) neben dem 1,4‐Dihydro‐Derivat.
ChemInform Abstract: SYNTHESIS OF BISPHOSPHATIDIC ACIDS DERIVATIVES AND THIOANALOGS
Authors: PREDVODITELEV D. A. , CHUKBAR T. G. , MALENKOVSKAYA M. A. , RASADKINA E. N. , NIFANT'EV E. E.
Published: April 2016

Die Phosphoglyceride (I) werden zu den entsprechenden Thio‐ bzw. Dithiophosphaten (II) umgesetzt und dann mit den Säurechloriden (III) zu den entsprechenden Thio‐ bzw. Dithiophosphatidsäuren (IV) acetyliert.
ChemInform Abstract: Cs2AgBiX6 (X: Br, Cl): New Visible Light Absorbing, Lead‐Free Halide Perovskite Semiconductors.
Authors: McClure Eric T. , Ball Molly R. , Windl Wolfgang , Woodward Patrick M.
Published: April 2016

The title compounds are synthesized from hot solutions containing HX (X: Cl, Br), H3PO2, AgX, and BiX3 by precipitation with CsX, and by solid state reaction of cesium, silver, and bismuth halide salts in a 2:1:1 molar ratio (alumina crucible, 210 °C, 10 h).
ChemInform Abstract: Enantioselective Hydrosilylation of Imines Catalyzed by Chiral Zinc Acetate Complexes.
Authors: Bezlada Agata , Szewczyk Marcin , Mlynarski Jacek
Published: April 2016

Zinc acetate complexes with optically pure diphenylethanediamine derived ligands are employed as enantioselective catalysts for hydrosilylation of imines.
ChemInform Abstract: Iodine(III)‐Mediated Oxidative Hydrolysis of Haloalkenes: Access to α‐Halo Ketones by a Release‐and‐Catch Mechanism.
Authors: Jobin‐Des Lauriers Antoine , Legault Claude Y.
Published: April 2016

An attempted asymmetric version of the reaction succeeds with modest enantioselectivity only.
ChemInform Abstract: Synthesis of Brominated Novel N‐Heterocycles: New Scaffolds for Antimicrobial Discovery.
Authors: Biswas Nripendra Nath , Kutty Samuel K. , Iskander George M. , Mielczarek Marcin , Bhadbhade Mohan M. , Gardner Christopher R. , Black David StC. , Kumar Naresh
Published: April 2016

Novel brominated N‐heterocycles based on aminobromopyrrolone and bromopyridazinone scaffolds are prepared from brominated furanones by reaction with hydrazines.
ChemInform Abstract: gem‐Difluoroolefination of Diazo Compounds with TMSCF3 or TMSCF2Br: Transition‐Metal‐Free Cross‐Coupling of Two Carbene Precursors.
Authors: Hu Mingyou , Ni Chuanfa , Li Lingchun , Han Yongxin , Hu Jinbo
Published: April 2016

In contrast to previously developed methods the presented protocol has a broad substrate scope, thus offering access to various 1,1‐difluoroalkenes such as difluoroacrylates, diaryldifluoroolefins and arylalkyldifluoroolefins.
ChemInform Abstract: Regiocontrolled Synthesis of (Hetero)aryl and Alkenyl Dehydropyrrolidines, Dehydropiperidines and Azepenes by Ru‐Catalyzed, Heteroatom‐Directed α‐C—H Activation/Cross‐Coupling of Cyclic Enamides with Boronic Acids.
Authors: Beng Timothy K. , Langevin Spencer , Braunstein Hannah , Khim Monique
Published: April 2016

The Ru‐catalyzed cross‐coupling of enamides (I), (IV), and (X) with aryl boronic acids leads regioselectively to 2‐aryl‐dehydropyrrolidine (III), ‐dehydropiperidines (VI), and ‐azepene (XI), respectively.
ChemInform Abstract: Carbamoyl Anion‐Initiated Cascade Reaction for Stereoselective Synthesis of Substituted α‐Hydroxy‐β‐Amino Amides.
Authors: Lin Chao‐Yang , Ma Peng‐Ju , Sun Zhao , Lu Chong‐Dao , Xu Yan‐Jun
Published: April 2016

An efficient three‐component coupling reaction of formamides, acylsilanes, and N‐diphenylphosphinylimines is developed.
ChemInform Abstract: Pd‐Indenyl‐Diphosphine: An Effective Catalyst for the Preparation of Triarylamines.
Authors: Zhu Xiao‐Lei , et al.
Published: April 2016

A novel class of the Buchwald type bidentate phosphine ligand for the Buchwald—Hartwig coupling reaction incorporating an indenyl diphosphine framework is synthesized providing different steric and electronic properties in contrast to the biaryl ligands reported by Buchwald and coworkers.
ChemInform Abstract: Copper‐Catalyzed C—N Bond Formation Using Dialkyl Azodicarboxylate as the Amination Reagent.
Authors: Samzadeh‐Kermani Alireza
Published: April 2016

An efficient C—N bond formation reaction for the synthesis of N‐aryl hydrazide derivatives is reported.
ChemInform Abstract: Catalytic Activity of Magnetic Fe3O4@Diatomite Earth and Acetic Acid for the N‐Acylation of Sulfonamides.
Authors: Ghasemi Mohammad Hadi , Kowsari Elaheh , Hosseini Seyed Kiumars
Published: April 2016

Analogous reactions promoted by glacial acetic acid give moderately lower yields.
ChemInform Abstract: Practical Organocatalytic Synthesis of Functionalized Non‐C2‐Symmetrical Atropisomeric Biaryls.
Authors: Gao Hongyin , Xu Qing‐Long , Keene Craig , Yousufuddin Muhammed , Ess Daniel H. , Kuerti Laszlo
Published: April 2016

Acid catalyzed coupling of electron rich p‐benzoquinone mono‐acetals and their corresponding mono‐acetal mono‐imines with reactive phenols offers a direct access to unsymmetrical biaryls.
ChemInform Abstract: Newly‐Generated Al(OH)3‐Supported Pd Nanoparticles‐Catalyzed Stille and Kumada Coupling Reactions of Diazonium Salts, (Het)aryl Chlorides.
Authors: Li Xing , Zhu Tingting , Shao Zhongqi , Li Yingjun , Chang Honghong , Gao Wenchao , Zhang Yongli , Wei Wenlong
Published: April 2016

The title reaction features excellent functional group compatibility, moderate to good yields, and feasibility of using heteroaryl chlorides, diazonium salts, and Grignard reagents.
ChemInform Abstract: Graphene‐Catalyzed Direct Friedel—Crafts Alkylation Reactions: Mechanism, Selectivity, and Synthetic Utility.
Authors: Hu Feng , Patel Mehulkumar , Luo Feixiang , Flach Carol , Mendelsohn Richard , Garfunkel Eric , He Huixin , Szostak Michal
Published: April 2016

An efficient methodology for the alkylation of various arenes with styrene derivatives or benzylic alcohols is described.
ChemInform Abstract: A Ligand‐Controlled Switch of Regioselectivity in Ring‐Opening Coupling of Diarylmethylenecyclopropa[b]naphthalenes with Grignard Reagents.
Authors: Cao Jian , Huang Xian , Wu Luling
Published: April 2016

A Pd(OAc)2 catalyzed highly regioselective ring‐opening coupling reaction of diarylmethylenecyclopropa[b]naphthalenes and Grignard reagents to provide differently substituted β‐vinylic naphthalenes is developed.
ChemInform Abstract: Enantioselective Synthesis of Spirocyclohexadienones by NHC‐Catalyzed Formal [3 + 3] Annulation Reaction of Enals.
Authors: Yetra Santhivardhana Reddy , Mondal Santigopal , Mukherjee Subrata , Gonnade Rajesh G. , Biju Akkattu T.
Published: April 2016

A wide range of pyrazolone‐fused spirocyclohexadienones are obtained by reaction of α‐,β‐unsaturated aldehydes with α‐arylidene pyrazolinones involving a vinylogous Michael addition/spiroannulation/dehydrogenation cascade.
ChemInform Abstract: Switchable Asymmetric Bio‐Epoxidation of α,β‐Unsaturated Ketones.
Authors: Liu Yu‐Chang , Wu Zhong‐Liu
Published: April 2016

Heteroaryl‐substituted butenones give low yields (3‐thienyl) or undergo reduction of the keto group only (2‐thienyl, 2‐pyridinyl, 3‐furanyl).
ChemInform Abstract: Acid‐Promoted Cross‐Dehydrative Aromatization for the Synthesis of Tetraaryl‐Substituted Pyrroles.
Authors: Wu Xudong , Li Ke , Wang Siyuan , Liu Chao , Lei Aiwen
Published: April 2016

Following the facile and efficient strategy benzoin and 1,2‐diarylethan‐1‐one derivatives form tetraaryl substituted pyrroles which are obtained as mixtures of regioisomers upon the transformation of substrates bearing two different aryl moieties.
ChemInform Abstract: Rh(III)‐Catalyzed C—H Cyclization of Arylnitrones with Diazo Compounds: Access to N‐Hydroxyindolines.
Authors: Dateer Ramesh B. , Chang Sukbok
Published: April 2016

The utility of the scalable method is demonstrated by the transformation of one N‐hydroxyindoline product into the corresponding nitroxide as well as by regioselective C‐7 functionalization in view of the preparation of pharmacophores.
ChemInform Abstract: Highly Chemoselective Synthesis of Benzimidazoles in Sc(OTf)3‐Catalyzed System.
Authors: Fan Liyan , Chen Wen , Kong Lulu
Published: April 2016

1,2 Disubstituted (IV) and 2‐monosubstituted benzimidazoles (III) can selectively be prepared by the Sc(OTf)3‐catalyzed reaction of o‐phenylenediamines with aromatic aldehydes.
ChemInform Abstract: Synthesis of 2‐Keto(hetero)aryl Benzox(thio)azoles Through Base Promoted Cyclization of 2‐Amino(thio)phenols with α,α‐Dihaloketones.
Authors: Jiang Jun , Zou Huaxu , Dong Qizhi , Wang Ruijia , Lu Linghui , Zhu Yonggang , He Weimin
Published: April 2016

A novel methodology for the preparation of the title compounds under metal‐free conditions is disclosed, using only EtNH2 as a promoter.
ChemInform Abstract: Effective and Novel Enantioselective Preparation of Pyranopyrazoles and Pyranocoumarins That Is Catalyzed by a Quinine‐Derived Primary Amine.
Authors: Yang Sai , Shen Liu‐lan , Kim Yoon‐Jung , Jeong Jin‐Hyun
Published: April 2016

A new method for the efficient synthesis of chiral pyranopyrazoles and pyranocoumarins is developed.
ChemInform Abstract: Tandem Metal‐Free Oxidative Radical 5‐exo Dearomative Spirocyclization and Ester Migration: Generation of 3‐Functionalized Coumarins from Alkynoates.
Authors: Liu Tong , Ding Qiuping , Qiu Guanyinsheng , Wu Jie
Published: April 2016

The method provides 3‐acetonylcoumarins in moderate yields, and depending on the 2,4‐dione used the products are isolated as the enol or the keto tautomer.
ChemInform Abstract: Three‐Step Synthesis of Substituted Isochromenes.
Authors: Chan Chieh‐Kai , Chan Yi‐Ling , Chang Meng‐Yang
Published: April 2016

A novel three‐step approach to substituted isochromenes consisting of Henry reaction, aerobic Wacker‐type oxidation, and intramolecular Michael cyclization is developed.
ChemInform Abstract: Microwave‐Promoted Efficient Synthesis of Pyrano[3,2‐c]chromen‐5(4H)‐ones under Catalyst and Solvent‐Free Conditions.
Authors: Veeranarayana Reddy Mudumala , Siva Kumar Badur , Lim Kwon Taek , Cho Byung Gwon , Jeong Yeon Tae
Published: April 2016

A highly sustainable and efficient multicomponent reaction of readily available 4‐hydroxy‐2H‐chromen‐2‐one, aldehydes, and acetophenones is developed.
ChemInform Abstract: Multicomponent Cascade Synthesis of Trifluoroethyl Isoquinolines from Alkynes and Vinyl Azides.
Authors: Liu Kai , Chen Shuang , Li Xing Guang , Liu Pei Nian
Published: April 2016

This novel approach, combining traditional Rh‐catalyzed C—H activation and Tognis reagent, provides a direct, concise access to trifluoroethylisoquinolines in moderate to good yields with good chemoselectivity and is appropriate to construct complex trifluoromethylated compounds in a single operation.
ChemInform Abstract: One‐Pot, Efficient and Green Synthesis of Acridinedione Derivatives Using Highly Monodisperse Platinum Nanoparticles Supported with Reduced Graphene Oxide.
Authors: Aday Burak , Yildiz Yunus , Ulus Ramazan , Eris Sinan , Sen Fatih , Kaya Muharrem
Published: April 2016

The title compounds are prepared by multicomponent cyclocondensation of dimedone, benzaldehydes, and anilines in short times and high yields.
ChemInform Abstract: Highly Efficient and Facile Synthesis of Densely Functionalized Thiazolo[3,2‐a]chromeno[4,3‐d]pyrimidin‐6(7H)‐ones Using [Bmim]BF4 as a Reusable Catalyst under Solvent‐Free Conditions.
Authors: Reddy Avuthu Vidya Sagar , Jeong Yeon Tae
Published: April 2016

The title synthesis from multicomponent condensation of 4‐hydroxylcoumarins, 2‐aminobenzothiazoles and aldehydes features simple operation, short reaction time, easy purification, wide functional group tolerance, and reusability of the catalyst for at least five cycles without obvious loss of activity.
ChemInform Abstract: Synthesis, Photophysical Properties and DFT Study of Novel Polycarbo‐Substituted Quinazolines Derived from the 2‐Aryl‐6‐bromo‐4‐chloro‐8‐iodoquinazolines.
Authors: Paumo Hugues K. , Mphahlele Malose J. , Rhyman Lydia , Ramasami Ponnadurai
Published: April 2016

The title derivatization employs sequential Sonogashira/bis‐Suzuki coupling reaction [e.g. synthesis of (VII)] or one‐pot three‐step Sonogashira coupling reaction [e.g. synthesis of (X)].
ChemInform Abstract: Asymmetric Organocatalytic Reductive Coupling Reactions Between Benzylidene Pyruvates and Aldehydes.
Authors: Horwitz Matthew A. , Zavesky Blane P. , Martinez‐Alvarado Jesus I. , Johnson Jeffrey S.
Published: April 2016

The scalable three‐component reaction between benzylidene pyruvates, aryl‐ or alkenyl aldehydes and dimethyl phosphite provides interesting coupling products with two vicinal polyfunctionalized stereocenters in a highly chemo‐ and stereoselective manner.
ChemInform Abstract: Asymmetric Diels—Alder Reaction Between 3,4‐Dimethyl‐1‐phenylphosphole and (Z/E)‐Diphenyl‐1‐styrylphosphine.
Authors: Ma Mengtao , Li Jia , Shen Xingchao , Yao Weiwei , Leung Pak‐Hing
Published: April 2016

The intramolecular cycloaddition between 3,4‐dimethyl‐1‐phenylphosphole and (E)‐diphenyl‐1‐styrylphosphine leads to a pair of diastereomeric endo‐cycloadducts as intermediates in the ratio of 1:1.
ChemInform Abstract: New Eunicellin‐Derived Diterpenoids from a Taiwanese Soft Coral Klyxum molle.
Authors: Chang Fang‐Yu , Chokkalingam Uvarani , Tai Chi‐Jen , Huang Chiung‐Yao , Wei Wen‐Chi , Yang Ning‐Sun , Su Jui‐Hsin , Sung Ping‐Jyun , Sheu Jyh‐Horng
Published: April 2016

Six new diterpenoids are isolated and some of them show anti‐inflammatory and cytotoxic activities.
ChemInform Abstract: Divergent 4,2′:6′,4′′‐ and 3,2′:6′,3′′‐Terpyridines as Linkers in 2‐ and 3‐Dimensional Architectures
Authors: Housecroft Catherine E.
Published: April 2016

Review: 56 refs.
ChemInform Abstract: Structural Aspects of Monomeric Platinum Coordination Complexes
Authors: Melnik Milan , Mikus Peter
Published: April 2016

Review: 18 refs.
ChemInform Abstract: Synthesis of 4H‐Thiazines
Authors: Urbanaite Aurelija , Cikotiene Inga
Published: April 2016

Review: [22 refs.
ChemInform Abstract: Lewis Acids Turn Unreactive Substrates into Pure Enantiomers
Authors: Dumoulin Audrey , Masson Geraldine
Published: April 2016

Review: 10 refs.
ChemInform Abstract: Cascade Polycyclizations in Natural Product Synthesis
Authors: Ardkhean R. , Caputo D. F. J. , Morrow S. M. , Shi H. , Xiong Y. , Anderson E. A.
Published: April 2016

Review: 55 refs.
ChemInform Abstract: Catalytic Strategies Toward Selective Hydrogenation of Aromatic Ketones and Phenols: Facile Synthesis of Cyclohexyl Ketones
Authors: Wei Yu , Zeng Xiaoming
Published: April 2016

Review: [24 refs.
ChemInform Abstract: Recent Progress on the Asymmetric Synthesis of Chiral Flavanones
Authors: Meng Ling , Wang Jun
Published: April 2016

Review: [30 refs.
ChemInform Abstract: Transition Metal Catalyzed Asymmetric Aryl Carbon—Heteroatom Bond Coupling Reactions
Authors: Zhou Fengtao , Liu Jianguang , Cai Qian
Published: April 2016

Review: [39 refs.
ChemInform Abstract: Achievement of Regioselectivity in Transition Metal‐Catalyzed Direct C—H (Hetero)Arylation Reactions of Heteroarenes with One Heteroatom Through the Use of Removable Protecting/Blocking Substituents or Traceless Directing Groups
Authors: Rossi Renzo , Lessi Marco , Manzini Chiara , Marianetti Giulia , Bellina Fabio
Published: April 2016

Review: [175 refs.
ChemInform Abstract: The Rise of 3‐d Single‐Ion Magnets in Molecular Magnetism: Towards Materials from Molecules
Authors: Frost Jamie M. , Harriman Katie L. M. , Murugesu Muralee
Published: April 2016

Review: [76 refs.
ChemInform Abstract: Emergence of the First Catalytic Oligonucleotides in a Formamide‐Based Origin Scenario
Authors: Sponer Judit E. , Sponer Jiri , Novakova Olga , Brabec Viktor , Sedo Ondrej , Zdrahal Zbynek , Costanzo Giovanna , Pino Samanta , Saladino Raffaele , Di Mauro Ernesto
Published: April 2016

Review: 97 refs.
ChemInform Abstract: Harnessing the Combined Power of Theoretical and Experimental Data Through Multiscale Informatics
Authors: Burke Michael P.
Published: April 2016

Review: 142 refs.
ChemInform Abstract: Design and Fabrication of Plasmonic Nanostructures with DNA for Surface‐Enhanced Raman Spectroscopy Applications
Authors: Leng Chunbo , Wang Cheng , Xiu Huixin , Qu Xiangmeng , Chen Lizhen , Tang Qian , Li Li
Published: April 2016

Review: 70 refs.
Online‐Prozessanalytik mit RFA und LIBS für die Regelung der Aufarbeitung von Klärschlammaschen
Authors: Ostermann Markus , Herzel Hannes , Kühn Andreas , Wedell Reiner , Mory David
Published: April 2016

Mithilfe eines thermochemischen Verfahrens können Wertstoffe aus Klärschlammaschen wieder für die Kreislaufwirtschaft nutzbar gemacht und Schadstoffe sicher entfernt werden. Zur Bestimmung von Elementgehalten in den Aschen und deren Produkten nach der Behandlung wurde ein Online‐Analysenverfahren entwickelt. Das Analysensystem ist eine Methodenkombination von laserinduzierter Plasma‐Spektroskopie (LIBS) und Röntgenfluoreszenzanalyse (RFA). Robustheit und modulare Bauweise des Verfahrens sind wichtige Anforderungen, um auch für andere Anwendungen nutzbar zu sein.
Removal of Copper and Hexavalent Chromium Using Immobilized Modified Sludge Biomass Based Adsorbent
Authors: Ramteke Lokeshkumar P. , Gogate Parag R.
Published: April 2016

The present work, deals with the development of an efficient modified sludge biomass (MSB) based adsorbent and subsequent application for the removal of copper and hexavalent chromium from wastewater. Different approaches of immobilization based on the use of polyvinyl alcohol (PVA), carboxymethyl cellulose (CMC), calcium alginate (CA), and activated carbon (AC) have been investigated with an objective of obtaining the most efficient biosorbent. Characterization studies for the adsorbents were performed followed by batch studies to compare the efficacy of different adsorbents for metal removal. Using the most efficient biosorbent, continuous operation studies were performed for understanding the effect of operating conditions such as initial pH, flow rate, inlet concentration, and bed height. The adsorption capacity was greatly affected by initial pH, adsorbent amount, contact time, and the type of polymer matrix. The order of adsorption capacities were MSB–PVA–CMC–AC > MSB–PVA–CMC > MSB–PVA > MSB–CA with maximum values being 288.6 and 215.4 mg g−1 for Cu(II) and Cr(VI), respectively. The experimental data were successfully fitted into different isotherms and kinetic models to establish the important design parameters. Reusability studies revealed that the MSB–PVA–CMC biosorbent could be reused for five biosorption–desorption cycles without any significant loss in the adsorption capacity. Overall, the immobilized MSB on PVA–CMC has been demonstrated as an effective biosorbent for removal of copper and chromium.
Coordinated seasonal regulation of metabolic and reproductive hypothalamic peptides in the desert jerboa
Authors: Talbi Rajae , Klosen Paul , Laran‐Chich Marie‐Pierre , El Ouezzani Seloua , Simonneaux Valérie
Published: April 2016

Jerboa (Jaculus orientalis) is a semi‐desert rodent displaying strong seasonal variations in biological functions in order to survive harsh conditions. When environmental conditions become unfavorable in early autumn, it shuts down its reproductive axis, increases its body weight, and finally hibernates. In spring, the jerboa displays opposite regulations, with a reactivation of reproduction and reduction in body weight. This study investigated how genes coding for different hypothalamic peptides involved in the central control of reproduction (Rfrp and Kiss1) and energy homeostasis (Pomc, Npy, and Somatostatin) are regulated according to seasons in male jerboas captured in the wild in spring or autumn. Remarkably, a coordinated increase in the mRNA level of Rfrp in the dorso/ventromedial hypothalamus and Kiss1, Pomc, and Somatostatin in the arcuate nucleus was observed in jerboas captured in spring as compared to autumn animals. Only Npy gene expression in the arcuate nucleus displayed no significant variations between the two seasons. These variations appear in line with the jerboa's seasonal physiology, since the spring increase in Rfrp and Kiss1 expression might be related to sexual reactivation, while the spring increase in genes encoding anorexigenic peptides, POMC, and somatostatin may account for the reduced body weight reported at this time of the year. J. Comp. Neurol. 524:3717–3728, 2016. © 2016 Wiley Periodicals, Inc.
Iron Pentapyridyl Complexes as Molecular Water Oxidation Catalysts: Strong Influence of a Chloride Ligand and pH in Altering the Mechanism
Authors: Das Biswanath , Orthaber Andreas , Ott Sascha , Thapper Anders
Published: April 2016

The development of molecular water oxidation catalysts based on earth‐abundant, non‐noble metals is essential for artificial photosynthesis research. Iron, which is the most abundant transition metal in the earth's crust, is a prospective candidate for this purpose. Herein, we report two iron complexes based on the polypyridyl ligand Py5OH (Py5OH=pyridine‐2,6‐diylbis [di(pyridin‐2‐yl)methanol]) that can catalyse water oxidation to produce O2 in RuIII‐induced (at pH 8, highest turnover number (TON)=26.5; turnover frequency (TOF)=2.2 s−1), CeIV‐induced (at pH≈1.5 highest TON=16; TOF=0.75 s−1) and photo‐induced (at pH 8, highest TON=43.5; TOF=0.6 s−1) reactions. A chloride ligand in one of the iron complexes is shown to affect the activity strongly, improve stability and, thereby, the performance at pH 8 but it inhibits oxygen evolution at pH≈1.5. The observations are consistent with a change in mechanism for catalytic water oxidation with the Fe(Py5OH) complexes between acidic (CeIV) and near‐neutral pH (RuIII).
Elucidating Structural Characteristics of Biomass using Solution‐State 2 D NMR with a Mixture of Deuterated Dimethylsulfoxide and Hexamethylphosphoramide
Authors: Yoo Chang Geun , Pu Yunqiao , Li Mi , Ragauskas Arthur J.
Published: April 2016

Recent developments of NMR methods for characterization of lignocellulosic biomass allow improved understanding of plant cell‐wall structures with minimal deconstruction and modification of biomass. This study introduces a new NMR solvent system composed of dimethylsulfoxide (DMSO‐d6) and hexamethylphosphoramide (HMPA‐d18). HMPA as a co‐solvent enhanced swelling and mobility of the biomass samples; thereby it allowed enhancing signals of NMR spectra. The structural information of biomass was successfully analyzed by the proposed NMR solvent system (DMSO‐d6/HMPA‐d18; 4:1, v/v) with different biomass. The proposed bi‐solvent system does not require derivatization or isolation of biomass, facilitating a facile sample preparation and involving with no signals overlapping with biomass peaks. It also allows analyzing biomass with a room‐temperature NMR probe instead of cryo‐probes, which are traditionally used for enhancing signal intensities.
Catalytic Conversion of Alcohols into Carboxylic Acid Salts in Water: Scope, Recycling, and Mechanistic Insights
Authors: Zhang Lei , Nguyen Duc Hanh , Raffa Guillaume , Trivelli Xavier , Capet Frédéric , Desset Simon , Paul Sébastien , Dumeignil Franck , Gauvin Régis M.
Published: April 2016

The catalytic conversion of alcohols into carboxylic acid salts in water was performed in the presence of ruthenium complexes supported by aliphatic PNP pincer ligands preformed or formed in situ. High activity toward a wide substrate scope was achieved with turnover number values of up to 4000. The air‐stable catalytic system can be recycled by using toluene as a catalyst‐immobilizing phase; the activity is maintained after five consecutive runs. Finally, mechanistic studies allowed some fundamental aspects related to water activation to be unveiled and to the mechanism postulated.
A novel active auxiliary circuit for efficiency enhancement integrated with synchronous buck converter
Authors: Panda Anup Kumar , Sarode Shiva , Tejavathu Ramesh
Published: April 2016

In this paper, a novel auxiliary circuit is introduced for the synchronous buck converter. This auxiliary circuit provides zero‐current, zero‐voltage switching conditions for the main and synchronous switches while providing zero‐current condition for the auxiliary switch and diodes. The proposed active auxiliary circuit integrated with synchronous buck converter that emanates to zero‐voltage transition (ZVT)–zero‐current transition (ZCT) pulse width‐modulated (PWM) synchronous buck converter is analyzed, and its operating modes are presented. The additional voltage and current stresses on main, synchronous and auxiliary switches get decimated because of the resonance of the auxiliary circuit that acts for a small segment of time in the proposed converter. The important design feature of soft‐switching converters is the placement of resonant components that mollifies the switching and conduction losses. With the advent of ZVT–ZCT switching, there is an increase in the switching frequency that declines the resonant component values in the converters and also constricts the switching losses. The characteristics of the proposed converter are verified with the simulation in the Power Sim (PSIM) software co‐simulated with MATLAB/SIMULINK environment and implemented experimentally. Copyright © 2016 John Wiley & Sons, Ltd.
Dynamic Behavior of Polydisperse Dust System in Cryogenic Gas Discharge Complex Plasmas
Authors: Antipov S. N. , Schepers L. P. T. , Vasiliev M. M. , Petrov O. F.
Published: April 2016

Complex (dusty) plasmas of micron‐sized CeO2 polydisperse particles in dc glow discharges at 77 and ∼ 10 K were experimentally investigated. It was obtained that dust structure in cryogenic gas discharge plasma can be a mixture of two fractions (components) with completely different dust ordering and dynamics. We observed under some specific conditions that fast‐moving particles of one component diffuse through another component consisted of dust particles arranged in linear chains (strings). From experimental data analysis particle velocity distribution functions for each dust component were obtained. The possible nature of two‐component dust structure formation was discussed. (© 2016 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Using marine reserves to manage impact of bottom trawl fisheries requires consideration of benthic food‐web interactions
Authors: van Denderen P. Daniël , Rijnsdorp Adriaan D. , van Kooten Tobias
Published: April 2016

Marine protected areas (MPAs) are widely used to protect exploited fish species as well as to conserve marine habitats and their biodiversity. They have also become a popular management tool for bottom trawl fisheries, a common fishing technique on continental shelves worldwide. The effects of bottom trawling go far beyond the impact on target species, as trawls also affect other components of the benthic ecosystem and the seabed itself. This means that for bottom trawl fisheries, MPAs can potentially be used not only to conserve target species but also to reduce impact of these side effects of the fishery. However, predicting the protective effects of MPAs is complicated because the side effects of trawling potentially alter the food‐web interactions between target and non‐target species. These changes in predatory and competitive interactions among fish and benthic invertebrates may have important ramifications for MPAs as tools to manage or mitigate the effects of bottom trawling. Yet, in current theory regarding the functioning of MPAs in relation to bottom trawl fisheries, such predatory and competitive interactions between species are generally not taken into account. In this study, we discuss how food‐web interactions that are potentially affected by bottom trawling may alter the effectiveness of MPAs to protect (1) biodiversity and marine habitats, (2) fish populations, (3) fisheries yield, and (4) trophic structure of the community. We make the case that in order to be applicable for bottom trawl fisheries, guidelines for the implementation of MPAs must consider their potential food‐web effects, at the risk of failing management.