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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1995 (1995), S. 115-124 
    ISSN: 0947-3440
    Keywords: Fullerenes, basic derivatives ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reactions of Diamines with Fullerene C60Reactions of 1,2- and 1,3-diamines 2a-i, including diamines containing primary amino groups, with C60 (1) in toluene are described, leading to mono- and bisadducts 3-16. In this way fullerene derivatives carrying NH as a nucleophilic functional group have been synthesized. Yields and ratios of mono- and bisadducts formed depend on reaction conditions and on the structure of the diamine. The scope of this reaction leading to defined mono- and bisadducts in appreciable yields has been investigated. Mono- and bisadducts formed can be separated by column chromatography on SiO2. Mass and NMR spectra reveal that the isolated basic fullerene derivatives are dehydro adducts. NMR spectra show that the monoadducts have a symmetrical structure. In all cases investigated the addition forming the mono- and bisadducts of 1 occurs across a 6-6 bond. Likewise analogous additions take place with C70. Remarkably, tertiary diamines such as 2p and q react with 1 forming the monoadduct 8 in small yields by loss of an alkyl group. Proposed structures of some regioisomeric bisadducts are discussed.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 752 (1971), S. 142-162 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: β-Halogenoalkyl Isocyanates from β-Lactams, II1)
    Notes: N-Brom- und N-Chlor-β-lactame 1 lagern sich bei Gegenwart von Olefinen oder Alkinen in radikalischer Reaktion, die durch Bestrahlung oder Radikal-Spender sowie thermisch angeregt werden kann, in β-Brom- bzw. β-Chlor-alkylisocyanate 2 um. Einflüsse verschiedener Faktoren auf die Reaktionsgeschwindigkeit, Untersuchungen zum Reaktionsmechanismus sowie stereochemische Beziehungen werden angegeben. Aus den reinen Enantiomeren der β-Lactame 1a und 1d werden die optisch aktiven Isocyanate 2a (R und S) bzw. 2d (R und S), deren absolute Konfigurationen feststehen, erhalten. Einige der dargestellten β-Bromalkylisocyanate werden in bekannte Aziridine oder 2-Oxazolidinone übergeführt.
    Additional Material: 7 Tab.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1974 (1974), S. 593-607 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Syntheses with 2-Amino-2-oxazolines, I. - Reactions of 2-Amino-2-oxazolines with α,β-Unsaturated Esters2-Amino-2-oxazolines 10 react with α,β-unsaturated carboxylic esters 2a- h to give 2,3,5,6- tetrahydro-7H-oxazolo[3,2-u]pyrimidin-7-ones 3. Reaction of 1 with maleic and fumaric esters 2k- m yields the 2,3,5,6-tetrahydro-7H-oxazolo[3,2-u]pyrimidin-7-ones 3t and u as main products. Reaction of 1 with the maleic imides 9a and b proceeds analogously. The 2,3,6,7-tetrahydro-5H-oxazolo[3,2-u]pyrimidin-5-one 4a is formed by cyclization of the 3- (2-oxazolin-2-ylamino)butyric ester 16 in presence of alkoxide. Reaction of compound 1 with the α,β-unsaturated acyl chlorides 17 yields each of the two possible isomeric tetrahydro- oxazolo[3,2-u]pyrimidinones 3 and 4.
    Notes: 2-Amino-2-oxazoline 1 reagieren mit α,β-ungesättigten Carbonsäureestern 2a- h, unter Bildung von 2,3,5,6-Tetrahydro-7H-oxazolo[3,2-a]pyrimidin-7-onen 3. Bei der Reaktion von 1 mit Malein- und Fumarsäureestern 2k-m entstehen als Hauptprodukte die 2,3,5,6-Tetra- hydro-7H-oxazolo[3,2-u]pyrimidin-7-one 3 t und u. Analog verläuft die Reaktion von 1 mit den Maleinimiden 9a und b. Das 2,3,6,7-Tetrahydro-5H-oxazolo[3,2-u]pyrimidin-5-on 4a wird durch Cyclisierung des 3-(2-Oxazolin-2-ylamino)buttersäureesters 16 in Gegenwart von Alkoholat erhalten. Bei der Reaktion von 1 mit α,β-ungesättigten Carbonsäurechloriden 17 entstehen beide möglichen isomeren Tetrahydrooxazolopyrimidinone 3 und 4.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 105 (1993), S. 1203-1205 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 94 (1982), S. 543-544 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: No Abstract.Das vollständige Manuskript dieser Zuschrift erscheint in: Angew. Chem. Suppl. 1982, 1213-1222
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 32 (1993), S. 1174-1176 
    ISSN: 0570-0833
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 21 (1982), S. 540-541 
    ISSN: 0570-0833
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: No Abstract.The complete manuscript of this communication appears in: Angew. Chem. Suppl. 1982, 1213. DOI:10.1002/anie.198212130
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 21 (1982), S. 1213-1222 
    ISSN: 0570-0833
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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