bluuebunny/crossref_metadata_2025_split huggingface dataset:
Eine einfache Berechnungsmethode zur Abschätzung des induktiven Effekts verschiedenartiger komplexer Substituenten
Authors: Draffehn Joachim , Ponsold Kurt 
Published: December 2004

A Simple Calculation Method for the Estimation of the Inductive Effect of Different SubstituentsA new method without great mathematical operations for the estimation of the inductive effect of any substituents is described. The starting values are the electronegativities and the bond lengths of the atoms of the corresponding substituent.The IDvalues, received by this method show a good correlation with the known electronic parameters (𝔉, σ′, σ*, σIand σ) and with the velocity constants and equilibrium constants of chemical reactions, respectively.
Zur Rolle von EDA‐Komplexen bei kationischen Polymerisationen. IV. Untersuchungen an Modellsystemen in Lösung
Authors: Heublein G. , Schubert G. , Hallpap P. 
Published: December 2004

On the Role of Charge‐Transfer Complexes in Cationic Polymerization. IV. Investigation of Model Systems in SolutionFor the purpose of modelling the influence of donors on the cationic polymerization the complex formation between triphenylmethyl salts of the type (p‐RC6H4)3C+MtX and aromatic π‐and n‐donors was investigated. The position of the charge‐transfer bands, the equilibrium constants as well as the enthalpies and entropies of complex formation were correlated with the acceptor strength of the cations resp. the basicity of the donors. The complex formation equilibrium was found to be strongly influenced not only by electronic but also steric effects. Strong π‐donors like hexamethylbenzene and anthracene as well as n‐donors like dialkylethers show a deviating behaviour.
Synthese von nitro‐ und aminosubstituierten Thiobenzamiden durch Thiolierungsreaktionen mit elementarem Schwefel unter milden Bedingungen
Authors: Mayer R. , Viola H. , Reichert J. , Krause W. 
Published: December 2004

Synthesis of Nitro‐ and Amino‐Substituted Thiobenzamides by Thiolation Reactions with Elemental Sulfur at Mild ConditionsThe Synthesis of thiobenzamides2–7by basecatalyzed thiolation of nitro‐benzyl‐halides (type1), especially at low temperatures, and the selective synthesis of p‐ and m‐nitro‐thio‐benzamides (2,3) or p‐and m‐amino‐thiobenzamides (5,6), respectively, are described. o‐Nitro‐benzylhalides (→4,7) are less reactive than p‐ and m‐nitro‐benzylhalides.The reaction of nitrobenzylhalides (type1) with elemental sulfur and amines occuring at low temperatures to give2–4leads via structures of the type11,15and16.
Zur Radikalischen Copolymerisation ungesättigter Isocyanate mit Vinylchlorid
Authors: Höring Siegfried , Kleine Dieter , Ulbricht Joachim 
Published: December 2004

On the Free Radical Copolymerization of Unsaturated Isocyanates with VinylchlorideThe free radical copolymerization of vinyl‐, isopropenyl‐ and p‐vinyl‐phenylisocyanate with vinylchloride in mass and tetrahydrofurane solution at 50°C is investigated. The incorporation of the isocyanate monomers in the copolymers is favoured. These monomers effect a great decrease of the rate of copolymerization and a crosslinking of the formed homo‐ and copolymers, whose extent depends on the kind and the quantity of the incorporated monomers. The crosslinking is caused by the forming of isocyanurate units.
Reaktionen von β‐Chlorvinylaldehyden. IV [1]. Synthesen von 2‐Formylmethylen‐2H‐1‐benzopyranen und Benzopyrylocyaninfarbstoffen aus β‐Chlorvinylaldehyden
Authors: Weissenfels Manfred , Hense [2] Hans‐Jörg 
Published: December 2004

Reactions of β‐Chlorovinylaldehydes. IV. Syntheses of 2‐Formylmethylene‐2H‐1‐benzopyranes and Benzopyrylocyaninedyes from β‐Chlorovinylaldehydesα‐Alkyl‐β‐chlorocrotonaldehydes react with salicylaldehyde in methanolic solution of potassium hydroxide forming 2‐formyl‐methylene‐2H‐1‐benzopyranes 1. The corresponding benzopyryliumsalts 2 which are easily available from 1 and strong acids, exist in the enolic form. They react at room temperature in alcoholic solution with elimination of ethyl formiate, yielding dark blue compounds which were identified as 2,2′‐benzopyrylotrimethincyanindyes 3. The structure of 3 has been elucidated by means of 1H‐n.m.r.‐spectra.
Folgeprodukte halogenierter Aldehyde. XIV [1]. Synthesen mit 1,2,2,2‐Tetrachlorethylisocyanat
Authors: Zinner H. , Rosenthal U. , Kruse H.‐P. , Rosenthal S. , Schnell M. 
Published: December 2004

Derivatives of Halogenated Aldehydes. XIV. Reactions of 1,2,2,2‐Tetrachloroethyl Isocyanate1,2,2,2‐Tetrachloroethyl isocyanate 2 reacts with alcohols or phenols to form the N‐tetrachloroethyl‐O‐alkyl(aryl) urethanes 3–6. With thioalcohols and thiophenols the corresponding thiourethanes 11–12 are obtained. In these compounds the chlorine in position 1 can be substituted by treatment with a nucleophilic compound in the presence of a base by way of an elimination addition mechanism. In these reactions the compounds 7–10 and 13–14 are formed. Amines attack 2 at both active centres to give the substituted ureas 15–18. Diphenyl amine, some carboxylic acid amides and benzazoles, however, react only with the isocyanate group to form the compounds 19–25. Reactions of 2‐amino‐benzazoles, 2‐amino‐pyridine and amidines with 2 yield the heterocyclic compounds 26–31.
Synthese des N‐terminal um 3 Positionen verkürzten Analogen der Rinderinsulin‐B‐Kette B 4–30 (Ala 4) in geschützter Form
Authors: Losse Günter , Stange Hans 
Published: December 2004

Synthesis of the N‐terminal by 3 Positions Shortened Analogue of the Bovine Insulin B Chain B 4–30 (Ala 4) in Protected FormStarting with the pentapeptide acid Z‐Ala‐His(Trt)‐Leu‐Cys(SEt)‐Gly‐OH and the deblocked dokosapeptide derivate H‐9‐30‐OBzl of our previously reported insulin‐B‐chain synthesis the shortened, in position 4 Ala substituted analogue B 4–30 in protected form was obtained.
Spektroskopie und Photochemie indigoider Verbindungen. V. Quantenchemische Berechnungen zum unterschiedlichen UV/S‐Spektralverhalten der trans‐ und cis‐Isomeren thioindigoider Verbindungen
Authors: Sühnel J. , Gustav K. 
Published: December 2004

Spectroscopy and Photochemistry of Indigoid Compounds. V. Quantum Chemical Calculations on the Different UV/VIS Spectral Behaviour of trans‐ and cis‐Isomers of Thioindigoid CompoundsThe concept of non‐bonding S…O‐interaction [3] has been proved for some thioindigoid compounds. The different spectral behaviour of trans‐ and cis‐isomers with regard to the long wave absorption band is mainly dependent on the number of S…O‐structural units and on the S…O‐distance. As compared to a coplanar structure twisting about the central double bond can result both in an increasing and a decreasing spectral shift.
Synthese von 6‐Ethyl‐7‐aryloxy(thio)methyl‐4‐hydroxychinolin‐3‐carbonsäure‐ethylestern
Authors: Schrötter E. , Raddatz A. , Herudek D. 
Published: December 2004

Synthesis of 6‐Ethyl‐7‐aryloxy(thio)methyl‐4‐hydroxy‐quinoline‐3‐carboxylic EstersBy etherification of phenoles and thiocresol with 2‐ethyl‐5‐nitrobenzyl chloride 2 to 1‐ethyl‐2‐aryloxy(thio)methyl‐4‐nitrobenzenes 3, reduction of 3 to the corresponding amino compounds 4, condensation of 1‐ethyl‐4‐amino‐2‐aryloxy(thio)methyl‐benzenes 4 with ethoxymethylen‐malonic ester to substituted aminomethylenmalonic esters 5 and thermal cyclization potential coccidiostatic 6‐ethyl‐7‐aryloxy(thio)methyl‐4‐hydroxyquinoline‐3‐carboxylic esters 6 have been synthesized. The structure of substituted quinolines was examined by n.m.r.
3‐Amino‐4‐cyanpyridazine durch Cyclisierung von Nitrilen
Authors: Gewald K. , Oelsner J. 
Published: December 2004

3‐Amino‐4‐cyano‐pyridazines by Cyclization of NitrilesThe reaction of arylglyoxale hydrazones or benzilhydrazone with malononitrile yields the 3‐amino‐4‐cyano‐pyridazines2which may be converted into substituted 4‐amino‐pyriimido [4,5‐c]pyridazine3and 4‐amino‐isothiazolo[3, 4‐c]pyridazines4. From ω‐hydrazino‐acetophenone and malononitrile the 1,2‐diaminopyrrole derivative6is formed.
Mehrfunktionelle N‐Tenside. I. Nucleophile Substitutionen an Bischlornitrosoverbindungen 2. Reaktionen mit Thioharnstoff, substituierten Thioharnstoffen, Salzen und Estern von Dithiocarbaminsäuren und Mercaptoheterocyclen [1]
Authors: Beger J. , Thielemann C. , Thong P. D. 
Published: December 2004

Polyfunctionalized N‐Tensides. I. Nucleophilic Substitutions with Bischloronitroso Compounds. 2. Reactions with Thiourea, Substituted Thioureas, Salts and Esters of Dithiocarbamic Acid and Mercaptoheterocyclic CompoundsReaction of bischloronitroso compounds 1 with thiourea and substituted thioureas gives 2‐aminothiazoles and 3‐alkyl‐2‐iminothiazolines‐(4). Ammoniumdithiocarbamate formes 4‐thiazolinethiones‐(2), and esters of the dithiocarbamic acids give 2‐alkylmercaptothiazoles. N‐substituted salts of dithiocarbamic acid and mercaptoheterocyclics react in boiling ethanol to form S‐(β‐oximinoalkyl)‐dithiocarbamates 8 and in some cases 4‐thiazolinthiones‐(2) 9.
Synthese von Heterocyclen durch C–C‐Knüpfung. III. Heterocyclensynthesen durch intramolekulare En‐Reaktion
Authors: Schmitz Ernst , Heuck Uwe , Preuschhof Helmut 
Published: December 2004

Synthesis of Heterocyclic Compounds by C–C‐bond Closure. III. Syntheses of Heterocyclic Compounds by Intramolecular En‐reactionCyclohexenyl‐acrylamides 1, bearing an alkyl or phenyl group at nitrogen, undergo cyclization to hexahydroindolones 2 on heating above 200°. The reaction follows the pattern of an intramolecular En‐reaction. Methacrylic acid, crotonic acid, fumaric acid or maleic acid may be part of the starting molecule in place of acrylic acid; cyclopentenyl‐amides may be used in place of cyclohexenyl‐amides. Pyrrolidone‐3‐acetic acids 16 undergo rearrangement to piperidone‐4‐carboxylic acids 17 on heating in the presence of strong alkali.
Desaktivierungsverhalten von Arenen und Heteroarenen. XVII. Löschung der Fluoreszenz von Kationen durch Anionen
Authors: Bendig JÜRgen , Kreysig Dieter , Gebert Horst , Regenstein Wolfgang 
Published: December 2004

Deactivation Behaviour of Arenes and Heteroarenes. XVII. Fluorescence Quenching of Cations by AnionsFluorescence quenching, caused by cation‐anion interaction in the excited state, was investigated for the combinations of 13 acridinium and acridizinium ions (fluorophors) and chloride, bromide and iodide (quenchers). The obtained dependence of rate constants of dynamic quenching process on the acceptor properties of cations in the case of chloride is interpreted by the model of electron transfer in the encounter state. The resulting limit‐rate constants of quenching are greater than those of diffusion of neutral molecules, caused by the Coulomb‐interaction between cation and anion.
Cyclisierungsreaktionen von 1‐[2‐Amino‐1‐cyan‐2‐thio‐]ethylen‐pyridiniumbetainen
Authors: Fischer E. , Rembarz G. , Wollin K.‐M. 
Published: December 2004

Cyclization Reactions of 1‐[2‐amino‐1‐cyano‐2‐thio‐]ethenepyridinium Ylides1‐[2‐Amino‐1‐cyano‐2‐thio‐]ethene‐pyridinium ylides 1 can be alkylated with methyliodide or α‐haloesters and α‐haloketones, respectively, to form 1‐[2‐alkyl(aryl)amino‐1‐cyano‐2‐methylthio‐ethene‐1]pyridinium iodides 2a‐–e or 1‐[2‐alkyl(aryl)‐amino‐1‐cyano‐2‐alkoxy(aryl)‐carbonylmethylthio‐ethene‐1] pyridinium salts 3a–f. With the exception of 3a–b the compounds 3 or 1 react with haloketones to yield 1‐[4‐amino‐2‐alkyl‐(aryl)amino‐5‐benzoyl‐thiene‐3]pyridinium salts 4a–m or 3‐alkyl‐4‐aryl‐2‐(1‐cyano‐1‐pyridinium)methylene‐Δ4‐thiazoline salts 5a–f.
Über heteroorganische Verbindungen. LII. Thiophosphonsäureamide und ihre Derivate
Authors: Almasi L. , Feneşan I. , Biró V. 
Published: December 2004

Heteroorganic Substances LII. Amidothiophosphonic Acids and Their DerivativesThe synthesis of amidocyclohexanthiophosphonic‐ and amidophenylthiophosphonic‐acids is described. The structure are determined by means of spectroscopical and chemical methods. These compounds 1–3 have not a bipolar structure, as assumed formerly [2] in the case of compound 3, but exist in a thiono‐thiolo tautomeric equilibrium, which lies far on the site of the thiono‐form. The alkylation of 1–3 with diazomethan gives S‐methyl‐, respectively O‐methyl‐derivatives. The alkylation of the ambident anions with CH3I gives only S‐methylderivatives, whereas the acylation with CH3COCl occurs at the oxygen atom.
Chemische Synthese der Oligonucleotide dpG‐A‐T‐A‐T‐C, dpG‐A‐T‐C‐T‐T‐T‐T und dpT‐T‐T‐C‐A‐T‐C‐A‐T
Authors: Weiss R. , Birch‐Hirschfeld E. , Reinert H. 
Published: December 2004

Chemical Synthesis of the Oligonucleotides dpG‐A‐T‐A‐T‐C, dpG‐A‐T‐C‐T‐T‐T‐T and dpT‐T‐T‐C‐A‐T‐C‐A‐TFor studies of some sequence dependent structural factors the oligonucleotides dpG‐A‐T‐A‐T‐C, dpG‐A‐T‐C‐T‐T‐T‐T and dpT‐T‐T‐C‐A‐T‐C‐A‐T were required. Their chemical synthesis is reported according to the diester method.
Modellrechnungen zum Gegenioneneinfluß auf die kationische Polymerisation; Der Zerfall der gemischten Halogenoantimonate SbCl5Br− und SbClBr
Authors: Zwanziger Heinz , Reinhold Joachim , Hallpap Peter , Heublein Günther 
Published: December 2004

Model Calculations on the Counterion Effect in the Cationic Polymerization; Decay of the Mixed Halogenoantimonates SbCl5Br− and SbClBrThe decay of the halogenoantimonates SbCl5Br− and SbClBr according to SbCl5Br− → SbCl5 + Br− resp. SbCl4Br + Cl− and SbClBr → SbBr5 + Cl− resp. SbClBr4 + Br− has been investigated by the quantum‐chemical CNDO/2 method including geometry optimization. The calculations show that the dissociation of the SbCl bond needs more energy (7,8 kcal/mol) than the dissociation of the SbBr bond.Dissociation of the complex anions is facilitated with increasing Br content.
Stereochemische Untersuchungen mit der 13C‐NMR‐Spektroskopie. V. Methyl‐ und tert.‐butylsubstituierte Cyclohexane
Authors: Jancke H. , Werner H. 
Published: December 2004

Stereochemical Investigations by Means of 13C‐N.M.R.‐Spectroscopy. V. Methyl‐ and tert.‐Butyl‐substituted CyclohexanesThe 13‐chemical shifts of some cyclohexanes with methyl and tert. butyl as substituents in configurational different positions are discussed. The substituent effects of the methyl and t‐butyl groups, respectively, on the C‐atoms of the ring are different and can be explained with the aid of long range (γ and δ) steric interactions. It is shown, that in all investigated compounds a twisted conformation of the ring is prefered instead of an axial arrangement of a t‐butyl group.
Cyansäureester. 29. Benzoxazolin‐thion‐N‐imidsäureester und ihre Folgereaktionen
Authors: Martin D. , Wenzel A. 
Published: December 2004

Cyanic Acid Esters. 29. Benzoxazoline‐thione‐N‐imid Esters and Their Consecutive ReactionsOxazoline‐thiones‐(2) and aryl cyanates react to form the corresponding isoureas 4. These compounds are remarkably stable against electrophilic reagents. The aminolysis of 4 proceeds two pathways: a transformation of the imid ester residue to the amin and a ring opening reaction by attack of the amin to the CS‐bond. The hydrazinolysis causes a ring‐transformation of the oxazoline‐ to the 1,3,4‐triazole system.
Zur Reaktion der N‐Sulfinylamine mit Isocyaniden und die Synthese von 2,5‐Diaryl‐3,4‐diarylimino‐1,2,5‐thiadiazolidin‐S‐oxiden
Authors: Beckert R. , Mayer R. 
Published: December 2004

The Reaction of N‐Sulfinylamines with Isocyanides and Synthesis of 2,5‐Diaryl‐3,4‐diarylimino‐1,2,5‐thiadiazolidin‐S‐oxidesN‐Sulfinylamines 1 react with isocyanides 2 to give isocyanates 3, isothiocyanates 6, and especially 2,5‐diaryl‐3,4‐diarylimino‐1,2,5‐thiadiazolidin‐S‐oxides 7.This new heterocyclic ring system 7 can also be synthesized in high yields by a cyclization reaction of tetraarylated oxalic amidines 9 with thionyl chloride.The acid catalyzed hydrolysis of the heterocyclic compounds 7 leads to oxalic anilides 8, the hydrolysis with alkali forms amidines 9. The amidine 9a reacts with N‐sulfinyl‐p‐toluenesulfonamide 11 to give an open chained adduct 12.
Sauer katalysierter Disulfidaustausch von S‐Alkylthio‐cystein‐Derivaten
Authors: Kunzek Herbert , Haupt Renate , Huschert Günter 
Published: December 2004

Proton‐Catalyzed Disulfide Exchange of S‐Alkylthio Cysteine DerivativesAlthough N‐unprotected S‐alkylthio cysteine derivatives are relatively stable in acid solutions, N‐acylsubstituted and N‐urethane protected S‐alkylthio cysteines react easily by disulfide exchange. As a rule the frequently used tert.‐butyloxycarbonyl amino protecting group, present in ethylthio cysteine derivatives can′t be removed selectively without disulfide cleavage, whilst the 2‐(p‐biphenylyl)isopropyloxycarbonyl and the 2‐phenyl‐isopropyloxycarbonyl amino protecting groups are removable without any structure change of the alkylthio thiol protecting groups. It is advisable to realize this acid demasking of the amino groups by means of weak deblocking reagents. Comperative experiments in acid solution prove S‐tert.‐butylthio group to be the most stable protecting function, whilst isopropylthio cysteine derivatives are more stable than the corresponding S‐ethylthio compounds. All these results and experiments with addition of different thiols as well as u.v.‐spectroscopic investigations indicate, that the observed acid catalyzed disulfide exchange proceeds via a carbonyl neighbouring group effect and formation of thiazolidinium and thiazolinium intermediates, respectively.
Photokatalytische Systeme. XXXIV. Über die Photoreduktion von Carboxylato(cuproin)kupfer(II)‐Chelaten in Alkoholen
Authors: Rehorek D. , Jarzynowski T. , Stasicka Z. 
Published: December 2004

Photocatalytic Systems. XXXIV. On the Photoreduction of Carboxylato(cuproine) Copper (II) Chelates in AlcoholsIn contrast to the behaviour in nonpolar aprotic solcents, the photolysis of cuproine copper(II) chelates of the type Cu(NN) (RCOO)2 (R  CH3, C(CH3)3; NN = sterically hindered heterocyclic 1, 2‐diimine ligand) in alcohols does not lead to formation of free radicals.A two‐step mechanism with non‐radicalic intermediates is derived from e.s.r. spin trapping and microsecond flash photolysis experiments.
Azoperoxide. VII. Thermolyse von α‐Alkylazo‐alkylhydroperoxiden
Authors: Schulz Manfred , Missol Udo 
Published: December 2004

Azoperoxides. VII. Thermolysis of α‐AlkylazoalkylhydroperoxidesThe thermal decomposition of 1‐methylazo‐1‐hydroperoxycyclohexane 1 and 1‐tert.‐butylazo‐1‐hydroperoxycyclohexane 2 was studied in ethylbenzene and in the case of 2 also in other solvents. Decomposition products and decomposition rates of the azo and the peroxy groups were selectively estimated. The title compounds decompose faster than the analogous azo compounds and alkylhydroperoxides. A induced homolysis of both initiator groups is proposed; the compounds are not „bifunctional initiators”︁.
Der Substituenteneinfluß auf IR‐Spektrenparameter von 4′‐phenylsubstituierten (E)‐Styryl‐methyl‐sulfonen
Authors: Siegmund Manfred , Wegener Wolfgang , Schleinitz Klaus‐Dieter 
Published: December 2004

The Influence of Substituents on the I.R. Spectral Parameters of 4′‐Phenylsubstituted (E)‐Styryl‐methyl‐sulphonesThe positions and integrated intensities of the bands corresponding to characteristic vibrations of eight 4′‐phenylsubstituted (E)‐styryl‐methyl‐sulphones were determined and correlated with substituent constants. The results demonstrate a linear dependence of the wavenumbers ofvSO2andVCC vibrations, respectively, with the electrophilic substituent constants σ. Otherwise the square roots of the integrated intensities A1/2(vsso2) and σgave no linear correlation.The influence of the substituents on the i.r. spectral parameters is discussed and compared with π‐bond orders and π‐electron densities. These magnitudes reflect qualitatively the behaviour of i.r. frequencies and intensities of selected absorption bands.
1H‐NMR‐Untersuchungen zur Identifizierung E/Z‐isomerer Vinylthiophosphate und Vinylphosphate
Authors: Preiss A. , Dietzel St. , Fedgenhäuer H. , Hesse B. 
Published: December 2004

1H‐N.M.R.‐Studies on the Identification of E/Z‐isomeric Vinyl Phosphorothioates and Vinyl PhosphatesThe E/Z assignment of 1, 1, 2‐tri and tetrasubstituted vinyl phosphorothioates and vinyl phosphates by 1H‐n.m.r. investigations is described. While the assignment of 1, 1, 2‐trisubstituted compounds is based on a positiv nuclear Overhauser effect which exists between ortho phenyl protons and the vinyl proton of the Z isomer, the configuration of the tetrasubstituted compounds has been determined by lanthanide induced shifts. The effect of different europium coordination in the vinyl phosphorothioates and vinyl phosphates on the paramagnetic shifts is discussed.
Zur Berechnung des HLB‐Wertes isomerer und substituierter Alkansulfonate
Authors: Sowada Rudolf 
Published: December 2004

Concerning the Calculation of HLB Values of Isomeric and Substituted Alkane SulphonatesBased on LIN's hydrophobicity index HLB values have been calculated for the isomeric dodecane sulphonates and some substituted pentadecane‐1‐sulphonates.
Zur Beschreibung der Wechselwirkung zwischen p‐substituierten Benzaldehyden und NMR‐Verschiebungsreagenzien
Authors: Piegsa U. , Radeglia R. , Doerffel K. 
Published: December 2004

Investigations to the Interaction between p‐Substituted Benzaldehydes and N.M.R.‐Shift ReagencesThe influence of n.m.r. shift reagents (Eu(fod)3 and Pr(fod)3) on the chemical shifts of p‐dimethylaminobenzaldehyde has been investigated at 13C and 1H‐n.m.r. spectroscopy. The induced shifts of the protons are quantitatively explained on the basis of pseudocontact interaction. In 13C‐n.m.r. spectra significant contact interactions have also been noted. The 13C induced shifts have been separated into pseudocontact and contact contributions by two different methods. Calculations of relative equilibrium constants in mixtures have been carried out for p‐dimethylaminobenzaldehyde, p‐nitrobenzaldehyde, anisaldehyde and benzaldehyde. The relative equilibrium constants show a good correlation with the Hammett substituent constants.
Chemistry and application of organic isocyanates. III. Reaction of Poly(oxyethylene)sucrose with n‐Octadecyl or Stearoyl Isocyanate
Authors: Lesiak T. , Iwaszkiewicz‐Nowak J. , Spychaj‐Fabisiak E. 
Published: December 2004

Chemie und Anwendung von organischen Isocyanaten. III. Umsetzungen von Poly(oxethylen)saccharose mit n‐Octadecyl‐ und Stearoyl‐isocyanatenDie Synthese von neuen N‐n‐Octadecyl‐ und N‐Stearoylcarbaminsäureestern der Poly(oxethylen)saccharose und die Schaumkraft der erhaltenen Verbindungen werden beschrieben. Oberflächenspannungen wäßriger Lösungen aller gewonnenen N‐substituierten Urethane werden in Abhängigkeit von der Konzentration untersucht und mit jenen von Na‐Dodecylsulfat und K‐Oleat verglichen.
Synthesen von β‐Fur‐2‐yl‐α‐halogenacrylonitrilen
Authors: Jähnisch K. , Seeboth H. 
Published: December 2004

Syntheses of β‐Fur‐2‐yl‐α‐halogenacrylonitrilesSyntheses of β‐fur‐2‐yl‐α‐halogenacrylonitriles 2a–f by Wittig‐olefination of furfurales, Hunsdiecker‐reaction of β‐(5‐nitro‐fur‐2‐yl)‐α‐cyanoacrylic acid 3, halogenation of β‐fur‐2‐yl acrylonitriles and reaction of furfurales with β‐azido‐α‐halogen‐γ‐methoxy‐Δα,β‐crotonolactones 9 are described.
Zur Berechnung effektiver Kohlenstoffzahlen für Heterogruppen enthaltende Paraffinketten Methylengruppenäquivalent‐Werte einiger Heterogruppen
Authors: Sowada Rudolf 
Published: December 2004

On the Calculation of Effective Carbon Numbers for Paraffin Chains Containing Hetero Groups. Methylene Group Equivalent Values for Some Hetero GroupsEffective carbon numbers and hydrophobicity indices for paraffin chains containing hetero groups have been calculated by means of STAUFF/KLEVENS′ equation from published cM data for adequately substituted alkylbenzene sulphonates and alkane sulphonates resp. Methylene group equivalent values ME are given for some hetero groups. Via ME values critical micelle concentrations for alkylbenzene sulphonates and for alkane sulphonates containing hetero groups can be calculated.