bluuebunny/crossref_metadata_2025_split huggingface dataset:
Vergleich von synthetischem und natürlichem Arginin‐vasopressin
Authors: Studer R. O. 
Published: December 2004

AbstractSynthetic arginine‐vasopressin, obtained using the tosyl group for protection of the guanidino group of the arginine residue, has been carefully compared with the freshly isolated natural hormone by physico‐chemical and biological methods. Both products proved to be identical.
Korrelation der (CH)‐Streck‐Frequenzen des Azulens mit der Ladungsordnung
Authors: van Tests A. , Günthard Hs. H. 
Published: December 2004

AbstractUsing the results of an analysis of the vibrational spectra of azulene and three deuterated modifications of it, the establishment of a correlation between charge order, calculated from different theoretical treatments, and the CH‐stretching frequencies of light azulene has been attempted. A monotone relationship has been found for each type (A1 and B1) of these vibrations, the frequency increasing with enlarging negative charge order.
Die Cardenolide von Gongronema gazense (S. MOORE) BULLOCK. Glykoside und Aglykone, 246. Mitteilung
Authors: Lewbart M. L. , Wehrli W. , Reichstein T. 
Published: December 2004

AbstractDas Holz von Gongronemu gazeme enthält reichlich Cardenolide. Bisher wurden nur die chloroformlöslichen Teile untersucht. Es liessen sich 10 krist. Cardenolide isolieren. Drei davon waren Genine, von denen H mit 3‐epi‐Digitoxigeni11, J mit Sarmentogenin und K mit dem bisher unbekannten 3‐epi‐Sarmentogenin identifiziert werden konnten. Die 6 übrigen Stoffe stellen neue Glykoside dar, über deren Bau in der nächsten Mitteilung berichtet wird. Das Holz von Gongronema gazense enthält daneben vermutlich noch andere, KEDDE‐negative Glykoside, die keinen Butenolid ring tragen und bisher nicht untersucht wurden.
Notiz über eine Darstellungsmethode für N‐Methyl‐aminosäuren
Authors: Peter H. , Brugger M. , Schreiber J. , Eschenmoser A. 
Published: December 2004

AbstractMild treatment of the methyl ester of (+)‐Nα‐(γ‐chlorobutyry1)‐L‐tryptophane with silver tetrafluoroborate gives a high yield of a crystalline iminolactone derivative. This compound is a useful intermediate in preparing (+)‐Nα‐methyl‐L‐tryptophane ((+)‐abrine).
Stoffwechselprodukte von Actinomyceten. 39. Mitteilung. Zur Biogenese des Acetomycins
Authors: Bachmann Elisabeth , Gerlach H. , Prelog V. , Zähner H. 
Published: December 2004

AbstractThe biogenesis of acetomycin (I), a metabolic product of Streptomyces ramulosus, ETTLINGER et al., has been investigated by adding specifically labeled radioactive precursors to the culture media of the microorganism. The distribution of the radioactivity has been determined by degradation according to flow sheet I. It is found that C‐1, C‐5 and C‐9 arise from the carboxylate carbon, and C‐2, C‐6, and C‐10 from the methyl carbon of the acetate ion. The methyl group C‐7 is transferred from Id‐methionin. The remaining carbon atoms C‐3, C‐4, and C‐8 originate from an unknown precursor that is a degradation product of D‐glucose.
Elektronenstruktur und physikalisch‐chemische Eigenschaften von Azo‐Verbindungen. Teil XII: Protonierung des m‐Dimethylaminophenyl‐azo‐azulens
Authors: Gerson F. 
Published: December 2004

AbstractThe absorption spectra of m‐dimethylaminophenyl‐azo‐azulene in weakly acid solutions have been recorded and the possible structures of its first conjugate acid discussed. In contrast to its p‐isomer, the compound is protonated mostly on the amino nitrogen, although a measurable amount of the azonium cation is also present. Chemical shifts of the amino methyl protons have been used to demonstrate the difference in protonation of the p‐ and m‐isomers. The proton resonance results are in qualitative agreement with the conclusions drawn from the absorption spectra in the visible region.
Heilmittelchemische Studien in der heterocyclischen Reihe. 41. Mitteilung. Eine unerwartete Reaktion bei der Umsetzung von 2,2,5,5‐Tetramethylimidazolidinthion‐(4) mit Salpetersäure
Authors: Ferrini P. G. , Marxer A. 
Published: December 2004

Abstract2.2.5.5‐Tetramethyl‐imidazolidinthione‐(4) treated with nitric acid quite unexpectedly yields 1‐nitroso‐2.2.5.5‐tetramethylimidazolidinone‐(4) whose structure is elucidated.
Reaktivierung der Fettsäuresynthese beim Biotinmangelhühnchen durch Biotinzugabe in vitro
Authors: v. Schulthess F. , Leuthardt F. 
Published: December 2004

AbstractLiver extracts of Biotin‐deficient chicken, compared with extracts from normal chicken, show a reduced rate of synthesis of fatty acids. This reduced synthesis can be normalized by an in vitro addition of d‐biotin. We may conclude that the synthesis of active acetyl‐CoA‐carboxylase from the inactive apoenzyme is possible in vitro.
Macrocycles synthétiques. III. Action de l'amalgame d'aluminium sur les di‐imines des polyméthylènedioxy‐2,2′‐dibenzaldéhydes
Authors: Bastian J.‐M. , Jaunin R. 
Published: December 2004

AbstractThe SCHIFF bases VII‐XI, when added under conditions of high dilution to a suspension of amalgamated aluminum in a mixture benzene‐ethanol, give the macrocyclic compounds XVII‐XXI. In each series the yields depend on the length of the polymethylene chain and are largest for the 12‐ to 16‐membered rings. On the other hand, for a give ring size, the yields vary strongly according to the nature of the group attached to the nitrogen atom and decrease in the order t‐butyl ≥ cyclohexyl > isopropyl > benzyl > methyl; this sequence seems to be determined mainly by steric effects.
De la constitution de quelques dérivés du méthyl‐2‐indoxyle
Authors: Giovannini E. , Farkas F. , Rosales J. 
Published: December 2004

AbstractThe products obtained (1) from o‐nitrobenzoyl (111) by reduction with Sn and HC1, (2) from N‐(o‐carboxypheny1)‐alanine (VIII) by HEUMANN reaction or (3) from the diester IX upon DIECKMANN condensation and air oxydation are identical. This product is shown to be 2,2′‐dimethyl‐2,2′‐diindoxylyle (VII).
Der heterogene Isotopenaustausch. I. Der Austausch an Fe3O4 mit 59Fe
Authors: Egger K. 
Published: December 2004

AbstractThe isotopic ion exchange between various forms of 59Fe labelled synthetic Fe3O4 and FeC12‐solution was investigated from 9 to 95°C, by measuring the activity of the solution after various reaction times. The observed exchange rate was compared with the theoretically calculated rate for a diffusion controlled reaction. The mathematics of the heterogeneous isotopic ion exchange is discussed. For short times a deviation from the y|√t relationship was observed and attributed to an initial process, superimposed on the diffusion reaction. This initial process probably consists of a rapid exchange of the solution with the first atomic layers of the solid. This problem will be treated mathematically in a subsequent paper. Diffusion coefficients (D8) can be estimated from the slope of the straight line in the y|√t plot. From the temperature dependence of the D8‐values the activation energy was calculated to be about 7 kcal/mole and the self diffusion coefficient (D0) of Fe in Fe3O4 was estimated to be 5 ± 3 · 10−6cm2s−1.
Über isomere 1:2‐Kobaltkomplexe der Formazan‐Reihe
Authors: Beffa F. , Lienhard P. , Steiner E. , Schetty G. 
Published: December 2004

Abstract1. Es wircl bcwiesen, dass dreizahnige Formazanc 1:2‐Kobaltkomplexe ergeben, welche Sake riner einbasischen Saure darstellen.
Über die Auswahl von Bezugszuständen bei der Berechnung von Standardaffinitäten für Verteilungsgleichgewichte
Authors: Milićević B. 
Published: December 2004

AbstractThe laws of mixtures are given in terms of absolute activities. The saturated solution as a new reference state is discussed and the usefulness of this concept for the definition of the standard affinity of partition equilibria is pointed out. The difficulties arising in the application of a partition equilibrium between two immiscible solvents as a model for dyeing equilibria are discussed.
Zur Kenntnis ätherischer Öle. 2. Mitteilung. Die Struktur der sogenannten «Linalooloxide»
Authors: Felix Dorothee , Melera A. , Seibl J. , Kováts E. Sz. 
Published: December 2004

AbstractMonoperphtalic acid oxidizes (−)‐linaloöl in the cold to the expected diastereomeric pair of 6,7‐dihydro‐6,7‐epoxy‐linaloöls. These substances are unstable. On heating or on treatment with acid they are converted to a mixture of two pairs of diastereomeric oxides C10H18O2. The pair A/B, amounting to about 90% of the secondary product, are known as the linaloöl‐oxides. They are shown to be tetrahydrofuran derivatives with the structures IV A and IV B. The pair C/D are diastereomeric tetrahydrophyran derivatives of the structures III C and III D.
Analyse radiochimique par activation aux neutrons thermiques Dosage direct du vanadium dans un acier 18/8, par mesure de l'activité du vanadium 52 (période 3,76 minutes)
Authors: Haerdi W. , Martin Ed. , Monnier D. 
Published: December 2004

AbstractLes valeurs (832 et 814 ppm) obtenues par dosage direct du vanadium dans le 18/8 activé, sont élevées que celles déterminées par spectrométrie de fluroescence X (730 ppm). La méthode proposée a l'avantage d'être rapide, simple et sensible. II est possible, dans conditions d'activation et de mesure, d'effectuer le dosage direct (N. D) sur 0,1 à 0.05 mg d'acier environ, la limite de dosage étant de 0,05 μg de vanadium.
Dissoziation des Thrombosthenins in seine zwei Komponenten Untersuchung ihrer Adenosintriphosphatase‐Aktivität
Authors: Bettex‐Galland M. , Portzehl H. , Lüscher E. F. 
Published: December 2004

AbstractThrombosthenin, das kontraktile Protein der Blutplättchen, kann wie das verwandte Aktomyosin as Muskel in zwei Komponenten aufgespalten werden.
Die Cardenolide von Beaumontia grandiflora WALLICH. 2. Mitteilung: Strukturaufklärung von Wallichosid, Beaumontosid und Beauwallosid. Glykoside und Aglykone, 250. Mitteilung
Authors: Krasso A. F. , Weiss Ek. , Reichstein T. 
Published: December 2004

AbstractDie Struktur der aus Beaumontia grandiflora WALLICH isolierten neuen Glykoside Willichosid (A), Beaumontosid (B) und Beauwallosid (C) wurde ermittelt: Wallichosid (I) = Digitoxigenin‐α‐L‐cymarosid, Beaumontosid (III) = Digitoxigenin‐α‐L‐oleandrosid und Beauwallosid (V) = Oleandrigenin‐α‐L‐cymarosid. Aus Wallichosid wurden nach milder saurer ydrolyse sowohl das Genin als auch der neue Zucker krist. isoliert. Die Zucker von Beaumontosid und Beauwallosid sowie das Genin des letzteren wurden nur papierchromatographisch bestimmt. Von Beaumontosid und Beauwallosid sowie das Genin des letzteren wurden nur papierchromatographisch bestimmt. Von Beauwallosid wurde noch des Desacetylderivat = Gitoxigenin‐α‐L‐cymarosid krist. Bereitet.
Sur l'hydrolyse acide du méthoxy‐1‐hexène‐1‐yne‐3 et du méthoxy‐1‐hexadiène‐1,3. Synthèse de pyrazoles substitués et du cis‐hexène‐3‐al
Authors: Winter M. 
Published: December 2004

AbstractAcid hydrolysis of 1‐methoxy‐1‐hexene‐3‐yne (I) gives as main product the unstable β‐oxohexanal, and not β‐hexynal as suggested earlier by Herbertz. The mechanism of this reaction is briefly discussed. Acid hydrolysis of I in the presence of phenylhydrazine yields a mixture of two 1‐phenyl‐prophylpyrazoles. With hydrazine, 3‐propyl‐pyrazole is obtained. This reaction is of general interest for the synthesis of 3‐substituted pyrazoles.
Zur Kenntnis der Hexaalkylbenzole. 4. Mitteilung. Über Dienaddukte des Hexaäthylidencyclohexans
Authors: Hopff H. , Kormany G. 
Published: December 2004

AbstractCondensed with some philodienes: maleic acid anhydride, tetracyano‐ethylene, naphthoquinone and acrolein, hexaethylidene‐cyclohexane yielded the corresponding diene addition products. Only two of the three conjugated double bonds of the hexaethylidene‐cyclohexane react with two molecules of the philodiene.
Dosage de traces de vitamine B12 par celui du groupe CN qu'elle renferme
Authors: Monnier D. , Saba R. , Galiounghi Y. 
Published: December 2004

AbstractOn décrit le dosage de la vitamine B12 par celui du cyanure qu'elle renferme. La vitamine est introduite dans une cuve de Conway et irradiée en milieu tartrique aux rayons UV. Le cyanure libéré est reçu dans le compartiment intéerieur renfermant du NaOH et dosé par colorimétrie selon une méthode à la pyridine‐pyrazolone. En présence de cyanure libre ou de substances susceptibles d'en former, on effectue deux microdiffusions sur le même échantilon, l'une dans l'obscurité, l'autre à la lumiàre. On peut doser jusqu'à 1 μg de B12 (0,02 μg CN−).
Synthesen von Schwefelsäureestern des Dopamins und verwandten Verbindungen
Authors: Hegedüs B. 
Published: December 2004

AbstractSyntheses of sulfuric acid esters of some catecholamine metabolities are described. Treating the phenolic amines with chlorosulfonic acid in an insert solvent with pyridine as acid aceptor was found to be of general use. Purification was mainly effected by means of ion exchange resins.
Organische Phosphorverbindungen. IX. Über einige Reaktionen des Methyldibromphosphins [CH3PBr2]
Authors: Maier L. 
Published: December 2004

AbstractThe reactions of methyldibromophosphine (CH3‐PBr2) with oxygen, ozone, sulfur, selenium, tellurium, primary and secondary amines, silver salts [AgX; X = CN, NCO, NCS], Grignard and silylmetallic compounds, alcohol and paraformaldehyde have been studied. The synthesis of CHaP(X)Br2 [X = 0, S, Se] and CH3PR2 [R = alkyl, aryl, SiR3, R2N, CN, NCO, NCS] is reported. The preparation of methyl‐bromomethyl‐phosphinic bromide, CH3(BrCH2)P(O)Br, and O‐ethylmethylphosphinate, CH3P(O)(OC2H5) H, is also described.
Über Pyromellitsäure‐ und Cumidinsäure‐Derivate. X. Teil
Authors: Hopff H. , Manukian B. K. 
Published: December 2004

AbstractThe oxidation of 1,4‐dinitro‐2,3,5,6‐tetrakis‐brommethyl‐benzene (VII) with conc. nitric acid gave dinitro‐pyromellitic acid (III) in small yield.
Mikrobiologische Umwandlung eines 11, 18‐dioxygenierten Progesteron‐Derivates. Mikrobiologische Reaktionen, 11. Mitteilung
Authors: Urech J. , Vischer E. , Wettstein A. 
Published: December 2004

AbstractBei der Inkubation des (18→11)‐Lactons der 3,20‐Dioxo‐11β‐hydroxy‐Δ4‐pregnen‐18‐säre (Ib) mit Kulturen von Fusarium solani (Mart.) App. et Wr. werden als Umwandlungsprodukte das (18→11)‐Lacton der 3,17‐Dixo‐11β‐hydroxy Δ1,4‐androstadien‐18‐säure (II), 3,17‐Dixo‐11β‐hydroxy‐Δ1,4‐18‐norandrostadien (IVa) und die entsprechende 13‐iso‐Verbindung (IIIa) sowie das (18→11)‐Lacton der 3‐Oxo‐11β,17β‐dihydroxy‐Δ1,4‐androstadien‐18‐säure (Va) gebildet. Die beiden 18‐Norsteroide IIIa und IVa lassen sich auch durch rein chemische Decarboxylierung aus dem Ketolacton II herstellen und werden unter dem Einfluss von Basen ineinander übergeführt. Die Konfigurationszunordnung am Kohlenstoffatom 13 der zwei 18‐Norsteroide erfolgte and Grund verschiedenen Acety‐lierungsgeschwindigkeiten sowie ihrer Rotationsdisperision.
Recherches sur la formation et la transformation des esters XLVIII. Sur la préparation de monoesters phosphoniques d'amino‐alcools et sur leur quaternisation
Authors: Cherbuliez Emile , Gabbai A. , Gowhari M. , Rabinowitz J. 
Published: December 2004

AbstractAmino alcohols containing a primary, a secondary or a tertiary amino group, yield with phenylphosphonic oxide the corresponding aminoalkyl phenylphosphonic monoesters.
Stoffwechselprodukte von Mikroorganismen 46. Mitteilung Die Konstitution des Lankamycins
Authors: Keller‐Schierlein W. , Roncari G. 
Published: December 2004

AbstractLankamycin is a new macrolide antibiotic composed of the aglycone, mono‐acetyllankolide (V), and two deoxysugars, lankavose (= chalcose, 11) and 4‐0‐acetylarcanose (111, K = H, R′ = CH,CO). Structure I for lankamycin has been determined by chemical degradation and NMR. investigations. The lactone moiety of the aglycone is biogenetically derived from 7 propionate and 1 acetate units.
2‐Substituierte 1‐Phenyl‐3‐sulfonamido‐3‐pyrazolin‐5‐one Über Pyrazole, 3. Mitteilung
Authors: Glatthard R. , Kuhn M. , Michel K. , Matter M. 
Published: December 2004

AbstractEs werden zwei Synthesen der bisher unbekannten 2‐substituierten 1‐Phenyl‐3 sulfonamido‐3‐pyrazolin‐5‐one und dafür benötigte Zwischenprodukte beschrieben Die neuen Sulfonamide sind stark sauer und wirken am Meerschweinchen antiphlogistisch.
Die thermodynamischen Aciditätskonstanten von Pikrinsäure und Trinitroresorcin bei 25°
Authors: Willi A. V. , Möri Peter 
Published: December 2004

AbstractFor picric acid and 2,4,6‐trinitroresorcinol the following thermodynamic acidity constants at 25° are determined by spectrophotometric measurements in dilute aqueous perchloric acid or acetate buffer: pK0 =0,373 (±0,010) (picric acid), and pK =0,06 (±0,015), pK =4,227 (±0,010) (2,4,6‐trinitroresorcinol). The data are discussed from the point of view of substituent effects.
Synthesen in der Depsipeptidreihe 3. MitteilungAnwendung der N‐Nitroso‐Schutzgruppe zur Synthese von Depsipeptiden Eine weitere Synthese von Enniatini A
Authors: Quitt P. , Studer R. O. , Vogler K. 
Published: December 2004

AbstractThe N‐nitroso function is introduced as a protecting group for secondary amino acids, and its application in the synthesis of depsipeptides ‐particularly of Enniatin A ‐is described. The method proved, however, not to be generally applicable in the synthesis of N‐alkylated peptides because of partial racemisation and frequent side reactions.
Dosage polarographique des résidus d'acétate de triphénylétain (Bresten) sur les légumes
Authors: Vogel J. , Deshusses J. 
Published: December 2004

AbstractNous avons mis au point une méthode de dosage des résidus de Brestan (acétate de triphénylétain) qui restent fixés sur les légumes aprés un traitement anticryptogamique des cultures. Elle consiste á extraire le Brestan au moyen d'un solvant organique, á minéraliser l‵extrait obtenu et é doser polarographiquement l'étain.
Über die Chemie des Vitamins E 6. Mitteilung Die Totalsynthese der beiden Enantiomeren des α‐Tocopherol‐Harnmetaboliten (SIMON‐ Metaboliten)
Authors: Mayer H. , Schudel P. , Rüegg R. , Isler O. 
Published: December 2004

AbstractThe total synthesis of the optical antipodes of the α‐tocopherol metabolite IV (SIMONmetabolite) is described.
Etudes sur les matières végétales volatiles. CXCIII Stéréochimie conformationnelle des carvomenthols d'après leurs spectres d'absorption infrarouge et leurs spectres de résonance magnétique nucléaire
Authors: Naves Yves‐René 
Published: December 2004

AbstractExamination of carvomenthol, isocarvomenthol and neocarvomenthol by IR.‐and NMR.‐spectroscopy confirms their stereochemistry established by JOHNSTON & READ and by BOSE.The p‐1(7),8‐menthadien‐2‐ol of Gingergrass oil and Cymbopogolz densiflorus oil has cis‐structure.
Etude par la méthode du champ autocohérent (self‐consistent) de la molécule BN
Authors: Masse J. L. , Bärlocher M. 
Published: December 2004

AbstractThe self‐consistent wave‐functions of BN, as those of BeO, could not possibly be computed with the usual SCF‐ROOTHAAN'S iterative procedure, because the calculations failed to converge in this case. Therefore we have applied to the BN molecule a SCF procedure devised by one of us (J. L. M.), which exhibits a quadratic convergence. The calculations were performed on BULL‐GAMMA‐60 and show a very good convergence. In this work we have restrained the basis SLATER‐type orbitals to the simple «minimal set » with usual exponents. The SCF molecular orbitals have been calculated in order to minimize the energy of the lowest 1∑+ state. This energy is found to be −78.679 a.u. With the same SCF‐orbitals the lowest 3Π state energy is found to be −78.717 a.u. that is lower than that of the 1∑+state, in agreement with the spectroscopic data (B. A. THRUSH).The energy of the lowest 3Π state is −78.677 a.u. The dipole moments are 1.430 D (B−N+) for the 3Π state and 2.33 D (N−B+) for the lowest 1∑+ state.
Novobiocin II. Die Synthese der 3–O–Carbamoyl‐noviose
Authors: Vaterlaus B. P. , Kiss J. , Spiegelberg H. 
Published: December 2004

AbstractThe synthesis of 3‐O‐carbamoyl‐noviose, the carbohydrate of the antibiotic novobiocin, is described. Starting with D‐glucose the synthesis comprises a number of steps (1–5) up to the important intermediate 3,5,6‐tri‐O‐benzyl‐2‐O‐methyl‐D‐galactono‐γ‐lactone (5), which was obtained by an intramolecular WALDEN inversion of 3,5,6‐tri‐O‐benzyl‐4‐O‐mesyl‐2‐O‐methyl‐D‐glucono‐N‐methylamide (4). Compound 5 shows the correct steric arrangement of the asymmetric centres with respect to noviose. Successive transformations (6–10) led to the synthesis of noviose and finally (9–14) to methyl 3‐O‐carbamoyl‐α‐novioside, which was identical with the substance obtained by acid catalysed methanolysis of the antibiotic novobiocin.
Novobiocin III. Die Glykosidsynthese des Novobiocins
Authors: Vaterlaus B. P. , Doebel K. , Kiss J. , Rachlin A. I. , Spiegelberg H. 
Published: December 2004

AbstractThe glycosidation of 4‐benzyloxy‐7‐hydroxy‐8‐methyl‐cumarin (2) with 2,3‐0‐carbonyl‐β‐noviosyl chloride (1) leading to the α‐glycoside (3) is described. This intermediate is transformed successively : (a) by hydrogenolysis (4), (b) introduction of an amine function (5) (6), (c) acylation with 4‐acetoxy‐3‐(isopent‐2′‐enyl)‐benzoyl chloride (10), (d) ammonolysis of 10, into a mixture of novobiocin (11) and isonovo‐biocin (12), of which novobiocin was obtained by fractional crystallisation.
Zur Konfiguration des natürlichen Capsanthins und Capsorubins
Authors: Faigle J. W. , Müller H. , von Philipsborn W. , Karrer P. 
Published: December 2004

AbstractEs wird bewiesen, dass die aus Capsanthin und Capsorubin durch oxydativen Abbau entstehende 1,2,2‐Trimethyl‐4‐hydroxy‐cyclopentancarbonsäure die trans‐Form ist (11) und dass daher in den beiden genannten Carotinoidfarbstoffen die Hydroxylgruppe im Fünferring in trans‐Stellung zum Carbonyl steht.
Neuere Untersuchungen Zur Reproduzierbarkeit der Rf‐Werte in der Dünnschichtehromatographie
Authors: Pataki György 
Published: December 2004

AbstractDurch Aufschlämmung des Sorptionsmittels mit Alkohol/Wasser manuell bereitete Kieselgel‐Schichten zeigen sich unter sonst gleichen Bedingungen den mit Hilfe des STAHL'schen Streichgerätes bereiteten Schichten in bezug auf Reproduzierbarkeit der Rf‐Werte unterlegen.
Aminosäuren und Peptide im Urin. 1. Mitteilung
Authors: Pataki György , Keller Max 
Published: December 2004

AbstractNach Umsetzung mit 2,4‐Dinitrofluorbenzol konnten im menschlichen Urin dünnschichtchromatographisch 45 ätherlösliche Dinitrophenyl‐Verbindungen nachgewiesen werden; davon stimmen 24 in ihrem diinnschichtchromatographischen Verhalten mit authentischen Dinitrophenylaminosäuren überein.
Etude des Propriétés chimiques d'oxadiazoles‐1,2,4 en relation avec leur degré d'aromaticité
Authors: Moussebios C. , Eloy F. 
Published: December 2004

AbstractThe study of the chemical properties of 1,2,4‐oxadiazoles has permitted to conclude to the electropositive character of the two carbon atoms in this ring. A clear demonstration of this is the ease of nucleophilic attack and the non occurrence of electrophilic attack.
Zur säurekatalysierten Reaktion von Galakturonsäure mit Methanol. I. α‐ und β‐Methyl‐D‐Galakturonofuranosid‐methylester
Authors: Schmidt H. W. H. , Neukom H. 
Published: December 2004

AbstractNeben den bisher nach Behandlung von D‐Galakturonsäure mit methanolischer Salzsäure in der Wärme gefundenen α‐ und β‐D‐galakturonopyranosid‐methylestern entstehen grössere Mengen von α‐ und von β‐Methyl‐D‐galakturono‐furanosid‐methylester im konstanten Verhältnis von 1 : 3.