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  • Inorganic Chemistry  (3,865)
  • 1970-1974  (3,865)
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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 1992-2002 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New Benzothiazines, II. 2H-1,2-Benzothiazin-3(4H)-one 1,1-Dioxide and 1H-2,3-Benzothiazin-4(3H)-one 2,2-Dioxide2H-1,2-Benzothiazin-3(4H)-one 1,1-dioxide (1a), 1H-2,3-benzothiazin-4(3H)-one 2,2-dioxide (2 a), and some N-substitution products have been prepared starting from the sulfonamides 4 or 15. The nitration of the compounds has been studied.
    Notes: 3.4-Dihydro-2H-1.2-benzothiazinon-(3)-1.1-dioxid (la) und 3.4-Dihydro-1H-2.3-benzothi-azinon-(4)-2.2-dioxid (2a) sowie einige N-Substitutionsprodukte werden ausgehend von den Sulfonamiden 4 bzw. 15 dargestellt. Die Nitrierung der Verbindungen wird untersucht.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 2109-2113 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Tetracyanoethylene Addition to Bridged Homotropilidenes and Bicyclo[4,2,2]decatetraeneThe addition of tetracyanoethylene (TCNE) to barbaralane (1) and dihydrobullvalane (3) occurs at the 3,7-positions of the homotropilidene system yielding 2 und 4, respectively.Bullvalene (6) as well as bicyclo[4,2,2]decatetraene (7) and (TCNE) give rise in different yields to the same adduct C10H10. TCNE. the generation of which is accompanied by skeletal rearrangements in 6 and 7.
    Notes: Tetracyanäthylen (TCNE) reagiert mit dem Homotropilidensystem des Barbaralans (1) und Dihydrobullvalens (3) in 3.7-Stellung zu den Homodienaddukten 2 und 4. Bullvalen (6) und Bicyclo[4.2.2]decatetraen (7) dagegen bilden mit TCNE in unterschiedlichen Ausbeuten das gleiche Addukt C10H10. TCNE, dessen Entstehung von Gerüstumlagerungen in 6 und 7 begleitet wird.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 2114-2121 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Knowledge of Organophosphorus Compounds, X. Synthesis and Properties of tert-Butyl Substituted Thiophosphoryl HalidesSynthesis and properties of the tert-Butylthiophosphorylhalides (t—C4H9)nP(S)X3-n (X = Cl, Br; n = 1, 2), the asymmetric compounds R(t—C4H9)P(S)Br (R = CH3, C2H5, i—C3H7) and RP(S)Br2 (R = CH3, i—C3H7) are described, i. r. - and n. m. r. -data are reported.
    Notes: Darstellung und Eigenschaften von tert. -Butylthiophosphorylhalogeniden (t—C4H9)nP(S)X3-n (X = Cl, Br; n = 1,2), der asymmetrischen Verbindungen R(t—C4H9)P(S) Br (R = CH3, C2H5, i—C3H7) und RP(S)Br2 (R = CH3, i—C3H7) werden beschrieben, IR- und NMR-spektroskopische Daten angegeben.
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 2122-2137 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of Al—H and Al—C Bonds with Strained Olefins and 1,5-DienesThe al—H addition to hexa- 1,5-dienes, which leads to cyclopentylmethylalanes 1), has been extended to 1,2-dialkylsubstituted cis-4,5-divinylcyclohexenes 17 and 21, cis- 1,2-divinylcyclohexane (23) and cis-1,2-divinylcyclobutane (6). The al — H elimination from the cyclic alanes from 17 and 21 leads to the formation of the methylene derivatives 20 and 22 in high yields. The cyclic alanes derived from 6 yield 12 in only small amounts. This is attributed to strain in the double bond in 12.  -  The effect of strain on the al -H and al-C addition and elimination reactions in the double bond system has been studied in the case of bicyclo[2,2, 1]hept-2-ene (26) and dicyclopentadiene (30).
    Notes: Die Al — H-Addition an Hexadiene-(1.5), die zu Cyclopentylmethylalanen führt 1), wurde auf 1.2-dialkyl-substituierte cis-4.5-Divinyl-cyclohexene 17 und 21, cis-1.2-Divinyl-cyclohexan (23) und cis-1.2-Divinyl-cyclobutan (6) übertragen. Die Al - H-Abspaltung aus den cyclischen Alanen von 17. und 21 erfolgt glatt zu den Methylencyclopentan-Derivaten 20 und 22. Die cyclischen Alane aus 6, bilden nur wenig Methylen-verbindung 12. Wir führen das auf eine Spannung in der Doppelbindung von 12 zurück. - Der Einfluß einer Baeyer-Spannung in Doppelbindungen auf die Al -H- und Al -C -Addition und -Eliminierung wurde am Beispiel von Bicyclo[2.2.1]hepten-(2) (26) und Dicyclopentadien (30) untersucht.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 2138-2147 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Inclusion Compounds, XXII. Cyclodextrin-Imidazole CompoundsA model for the cooperation of a hydroxyl group of the amino acid serine and an imidazole residue of histidine in the active site of chymotrypsin has been synthesized. Cyclodextrins with their numerous hydroxyl groups and a cavity capable of including other molecules and derivatives of cyclodextrins reacted with 4(5)-chloromethylimidazole or 4(5)-aminoalkylimidazoles to give, as expected, amorphous, non stoichiometric cyclodextrin-imidazole compounds. These accelerate the hydrolysis of p-nitrophenyl acetate about 300-fold.
    Notes: Es wird versucht, Modelle für das Zusammenwirken der Hydroxygruppe eines Serins und des Imidazolrestes eines Histidins im aktiven Zentrum des Chymotrypsins aufzubauen. Dazu werden Cyclodextrine, die zahlreiche Hydroxygruppen tragen und in ihren inneren Hohlraum andere Stoffe einschließen können, mit 4(5)-Chlormethyl-imidazol oder Cyclodextrin-Derivate mit 4(5)-Aminoalkyl-imidazolen zu amorphen, erwartungsgemäß nicht stöchiometrischen Cyclodextrin-Imidazol-Verbindungen umgesetzt. Diese beschleunigen die Hydrolyse von p- Nitro-phenylacetat bis etwa 300 fach.
    Additional Material: 3 Ill.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 2234-2239 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Boron, LIII. Derivatives of SilaborazinesThe N, N′ - dilithiotriazaboradecalin 2 reacts with bis(dichloromethylsilyl)amine to form the disilaborazine derivative 3. No four membered cyclic BN2Si - system is produced from CH3B(NCH3Li)2 (4) and (C6H5)2SiCl2; however, the six membered silaborazines (C6H5)2Si[NCH3—BCH3]2NCH3 (8) and CH3B[NCH3—Si(C6H5)2]2NCH3 (7) are obtained besides [(C6H5)2SiNCH3]3 (6) and [CH3BNCH3]3 (9).
    Notes: Das N.N′ - Dilithio-triazaboradekalin 2 reagiert mit Bis (dichlormethylsilyl) - amin zum Disila - borazolderivat 3. Hingegen liefern Bis (N - lithio-methylamino) - methyl-boran (4) und Diphenyldichlorsilan kein viergliedriges BN2Si - Ringsystem, sondern neben [(C6H5)2SiNCH3]3 (6) und [CH3BNCH3]3 (9) die Silaborazole (C6H5)2Si[NCH3—BCH3]2NCH3 (8) und CH3B[NCH3—Si(C6H5)2]2NCH3 (7).
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 2225-2233 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of Cyclobutenediones, XV. Reactivity of 3-Hydroxy-1,2-diphenylcyclobut-2-ene-4-onesHydroxydiphenylcyclobutenones 1 can be methylated by diazomethane to give methoxydiphenylcyclobutenones 2. On addition of diluted sodium hydroxide solution sodium salts 3 are received which react with benzoyl chloride, acetyl chloride and bromophenylcyclobutenedione to form the esters 4 and 6.2 and 4 can be oxidized to diphenylcyclobutenedione 5. 0-Phenylenediamine or N-methyl-0-phenylenediamine react with 1 to form trans,-stilbenes 7 and dihydro-quinoxalino-quinoxaline 8 or dimethyl-dihydro-quinoxalino-quinoxaline 10, respectively.
    Notes: Hydroxydiphenylcyclobutenone 1 werden mit Diazomethan zu Methoxydiphenylcyclobutenonen 2 methyliert. Mit verdünnter Natronlauge erhält man aus 1 die entsprechenden Natriumsalze 3, die mit Benzoylchlorid, Acetylchlorid und Brom-phenylcyclobutendion zu den Estern 4 und 6 reagieren. 2 und 4 werden zu Diphenylcyclobutendion 5 oxydiert. O-Phenylendiamin bzw. N-Methyl-o-phenylendiamin bilden mit 1 trans-Stilbene 7 und Fluoflavin 8 bzw. Dimethyl-flouoflavin 10.
    Additional Material: 4 Tab.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 2245-2251 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Polyacetylenic Compounds, 178. Constituents of Grindelia SpeciesThe investigation of further Grindelia species shows the presence of some new C10-acetylenic compounds (1-3, 8, 9, 13, 14, 22, 23) representing biogenetical relationships in this genus. Feeding experiments furnish more details of the biogenesis of the C10-compounds.
    Notes: In weiteren Grindelia-Arten werden einige neue C10-Acetylenverbindungen (1-3, 8, 9, 13, 14, 22, 23) nachgewiesen, die die biogenetische Beziehung in dieser Gattung aufzeigen. Fütterungsversuche zeigen weitere Einzelheiten über die Biogenese der C10-Verbindungen.
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 2271-2273 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaction of some Ditellurides, Diselenides, and Disulfides with DiazomethaneDiazomethane reacts with organoditellurides, -diselenides, and -disulfides to give telluro-, seleno-, and thioacetals. Mechanisms for this reaction are suggested.
    Notes: Die Umsetzung von Diazomethan mit einigen Ditelluriden, Diseleniden und Disulfiden ergibt die entsprechenden Tellur-, Selen - und Thioacetale. Mechanismen für diese Umsetzungen werden vorgeschlagen.
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 2274-2280 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Knowledge of Organophosphorus Compounds, XI. Preparation and Properties of Methyl-tert-butylthiophosphinic Acid DerivativesSynthesis and properties of the methyl-tert-butylthiophosphinic acid derivatives CH3(t-C4H9)P(S)X (X = Br, OR, OH, ONa, O-Chinin. H, OZn/2, SNa, Cl and t-C4H9) are described. I. r. and n. m. r. data are reported.
    Notes: Darstellung und Eigenschaften der Methyl-tert.-butyl-thiophosphinsäure-Derivate des Typs CH3(t-C4H9)P(S)X (X = Br, OR, OH, ONa, O-Chinin H. OZn/2, SNa, Cl und t-C4H9) werden beschrieben und ihre IR- und NMR-spektroskopischen Daten mitgeteilt.
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