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  • Polymer and Materials Science  (37)
  • Life and Medical Sciences  (26)
  • Chemical Engineering  (13)
  • Inorganic Chemistry  (12)
  • General Chemistry  (9)
  • Patella  (3)
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Material
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Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Paget's disease of the patella (1990)
    Springer
    Skeletal radiology 19 (1990), S. 407-410 
    Details
    ISSN: 1432-2161
    Keywords: Paget's disease ; Patella
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Five patients with Paget's disease involving the patella were evaluated for the following radiographic features: trabecular pattern, cortical integrity, density, and size of the affected patella. Radiographic appearances consisted of minimal trabecular coarsening in the patella of nearly normal size and progressed to considerable cortical thickening and osteoblastic remodeling in a dramatically enlarged patella. The radiologic features of Paget's disease of the patella are distinctive and should obviate biopsy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00241790
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  • 2
    Electronic Resource
    Electronic Resource
    Primary tumors of the patella (1989)
    Springer
    Skeletal radiology 18 (1989), S. 365-371 
    Details
    ISSN: 1432-2161
    Keywords: Bone tumors ; Patella ; Patellar tumors ; Skeletal neoplasms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract This study reports 42 cases of histologically proven and radiographically correlated primary patellar tumors. Despite diverse histologic diagnoses, the radiographic appearances of benign as opposed to malignant patellar neoplasms are essentially indistinguishable. Although the literature suggests that giant cell tumor is the most frequent benign tumor of the patella, the most common benign neoplasm in this series is chondroblastoma (16 cases). Only four primary malignant lesions were encountered, three cases of lymphoma and one case of hemangioendothelioma. Since 38 (90%) of the 42 cases were benign, a benign etiology should be strongly favored, notwithstanding the radiographic appearance, whenever a primary patellar tumor is encountered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00361426
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  • 3
    Electronic Resource
    Electronic Resource
    Chondroblastoma of the patella (1988)
    Springer
    Skeletal radiology 17 (1988), S. 413-419 
    Details
    ISSN: 1432-2161
    Keywords: Chondroblastoma ; Bone tumor ; Chondroblastoma of patella ; Patella
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract This study reviews 16 cases of chondroblastoma of the patella which constitute nearly 6% of a large group of chondroblastomas scattered throughout the skeleton. Both radiologic and histologic appearances of chondroblastomas of the patella are indistinguishable from those of chondroblastomas arising in other sites. A reasonable differential diagnosis, including chondromalacia patella, is discussed together with important therapeutic considerations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00361660
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  • 4
    Electronic Resource
    Electronic Resource
    Heterocyclen mit einem Azaallyl-System, 4. 5H-Dibenz[c,e]azepine mit Donor-Gruppen in 7-Stellung (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 2085-2090 
    Details
    ISSN: 0009-2940
    Keywords: 5H-Dibenz[c,e]azepines ; Imidates ; alkyl ; heterocyclic ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Heterocycles with an Azaallyl System, 4.  -  5H-Dibenz[c,e]azepines with Donor Groups at the 7-Position5H-Dibenz[c,e]azepines substituted with a methoxy (1) or methylthio group (10) at the 7-position have been synthesized from 6,7-dihydro-5H-dibenz[c,e]azepin-5-one (5) by regioselective O- or S-alkylation with methyl trifluoromethansulfonate and subsequent NH-deprotonation. According to the spectroscopic properties the semicyclic 7-membered alkyl imidates exist exclusively in the benzenoid 5H structure.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911240934
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  • 5
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Chemie von Isoindolen und Isoindoleninen, XXVII. 2-Alkyl-2H-dibenz[e,g]isoindole: Synthese, Eigenschaften, Reaktionen (1988)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 81-87 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Studies on the Chemistry of Isoindoles and Isoindolenines, XXVII. - 2-Alkyl-2H-dibenz[e,g]isoindoles; Synthesis, Properties, ReactionsThe tetracyclic hetarenes 6 are easily accessible via the N-oxide route starting with 9,10-bis(bromomethyl)phenanthrene (3) in a three-step procedure. The twofold annelation reduces the diene reactivity of the central 2H-isoindole system. Cycloaddition occurs as well with activated alkynes as with arynes. The hetarenes 6 can be protonated with trifluoroacetic acid and substituted by reaction with arenediazonium tetrafluoroborates.
    Notes: Die tetracyclischen Hetarene 6 sind nach dem N-Oxid-Verfahren einfach aus 9,10-Bis(brommethyl)phenanthren (3) präparativ dreistufig zugänglich. Durch die zweifache Anellierung wird die Reaktivität des zentralen 2H-Isoindol-Systems abgeschwächt. Cycloaddition tritt sowohl mit aktivierten Alkinen als auch mit Arinen ein. Die Hetarene 6 sind mit Trifluoressigsäure protonierbar und durch SE-Reaktion mit Arendiazonium-tetrafluoroboraten substituierbar.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19881210113
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  • 6
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Chemie von Isoindolen und Isoindoleninen, XXVIII. 3-Alkoxy-1H-isoindole  -  Synthesen und Eigenschaften (1988)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 243-252 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Studies on the Chemistry of Isoindoles and Isoindolenines, XXVIII.  -  3-Alkoxy-1H-isoindoles, Syntheses and Properties3-Alkoxy-1H-isoindoles 1 bearing substituents at the carbocyclic moiety have been synthesized from substituted 2,3-dihydro-1H-isoindol-1-ones 4 by regiospecific O-alkylation to 5 with trialkyloxonium tetrafluoroborates or methyl trifluoromethanesulfonate and subsequent NH deprotonation. According to the spectroscopic properties the semicyclic alkyl imidates 1 exist exclusively in the benzenoid 1H structure; the tautomeric o-quinonoid 2H structure 2 cannot be detected by spectroscopic means.
    Notes: 3-Alkoxy-1H-isoindole 1 mit Substituenten am carbocyclischen Teil wurden aus substituierten 2,3-Dihydro-1H-isoindol-1-onen 4 durch regiospezifische O-Alkylierung mit Trialkyloxonium-tetrafluoroboraten oder Trifluormethansulfonsäure-methylester zu 5 und nachfolgende NH-Deprotonierung synthetisiert. Aufgrund der spektroskopischen Befunde existieren die semicyclischen Imidsäure-alkylester 1 ausschließlich in der benzoiden 1H-Form; die tautomere 2H-Form 2 mit o-chinoider Struktur ist spektroskopisch nicht nachweisbar.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19881210209
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  • 7
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Chemie von Isoindolen und Isoindoleninen, XXIX. Reaktionen des 2H-Isoindols mit Maleinimiden: Ein einfaches Herstellungsverfahren für 7-Azabicyclo[2.2.1]heptene (1988)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 927-934 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Studies on the Chemistry of Isoindoles and Isoindolenines, XXIX.  -  Reactions of 2H-Isoindole with Maleic Imides: A Simple Procedure for the Preparation of 7-Azabicyclo [2.2.1]heptenesSolutions of 2H-isoindole 1 in ether were prepared by a simple procedure and treated with maleic imides 2. 1,3-Cycloaddition reactions lead to the formation of 1:1 adducts 3 with an 7-azabicyclo[2.2.1]heptene frame. The endo isomers 3.1 can thermally be isomerized to the more stable exo isomers 3.2. The constitution and configuration of the 1:1 cycloadducts 3 are established by 1H- and 13C-NMR spectroscopy.
    Notes: Lösungen des 2H-Isoindols 1 in Ether werden nach einem einfachen Verfahren hergestellt und mit Maleinimiden 2 umgesetzt. 1,3-Cycloadditionsreaktionen führen zu 1:1-Addukten 3 mit der Struktur von 7-Azabicyclo[2.2.1]heptenen. Die endo-Isomeren 3.1 lassen sich thermisch in die stabileren exo-Isomeren 3.2 umlagern. Konstitution und Konfiguration der 1:1-Cycloaddukte 3 werden durch die 1H- und 13C-NMR-Spektren begründet.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19881210517
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  • 8
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Chemie von Isoindolen und Isoindoleninen, XXXVII. Symmetrisch substituierte 2-Alkyl-2H-isoindole (1990)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 123 (1990), S. 1719-1727 
    Details
    ISSN: 0009-2940
    Keywords: Isoindoles, symmetrically substituted ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Studies on the Chemistry of Isoindoles and Isoindolenines, XXXVII1) - Symmetrically Substituted 2-Alkyl-2H-isoindoles2-Alkyl-Rn-2H-isoindoles (1; Rn=4,5,6,7-tetramethyl, 4,5,6,7-tetrachloro) have been prepared efficiently by the N-oxide route and characterized by spectroscopic means.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19901230823
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  • 9
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Chemie von Isoindolen und Isoindoleninen, XXXI. 4,5,6,7-Tetrachlor- und 4,5,6,7-Tetrabrom-2H-isoindol (1988)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 1827-1832 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Studies on the Chemistry of Isoindoles and Isoindolenines, XXXI. 4,5,6,7-Tetrachloro- and 4,5,6,7-Tetrabromo-2H-isoindolesThe crystalline 2H-isoindoles 4b are synthesized starting with substituted 2-methylsulfonyl-2,3-dihydro-1H-isoindoles 3 by base-induced elimination of methanesulfinic acid. Compared with the parent compound, a considerable thermal stabilization and chemical deactivation is caused by the halogen atoms at the carbocyclic system. The spectroscopic properties of the o-quinonoid hetarenes 4b have been investigated.
    Notes: Die kristallinen 2H-Isoindole 4b werden aus substituierten 2-Methylsulfonyl-2,3-dihydro-1H-isoindolen 3 durch Basen-induzierte Eliminierung von Methansulfinsäure synthetisiert. Die Halogenatome am carbocyclischen System bewirken - verglichen mit dem Grundkörper - eine beträchtliche thermische Stabilisierung und chemische Desaktivierung. Die spektroskopischen Eigenschaften der o-chinoiden Hetarene 4b wurden untersucht.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19881211022
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  • 10
    Electronic Resource
    Electronic Resource
    Struktur und Reaktivität von isoanellierten heterocyclischen Systemen mit 4n;-π- und (4n + 2)-π-Elektronen, XVIII. Benzo[c]thiophene mit symmetrischer Struktur: Modifizierte und optimierte Herstellung nach der S-Oxid-Route (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 645-654 
    Details
    ISSN: 0009-2940
    Keywords: Benzo[c]thiophenes ; preparation by the S-oxide route ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Structure and Reactivity of Isoannullated Heterocyclic Systems with 4n;-π and (4n + 2)-π Electrons, XVIII. - Benzo[c]thiophenes with Symmetric Structure: Modified and Optimized Preparation by the S-Oxide RouteBenzo[c]thiophenes (15) with symmetric structure have been prepared efficiently from 1,3-dihydrobenzo[c]thiophene 2-oxides (9) by reaction with aluminium oxide, by O-acylation with trifluoroacetic anhydride, or O-alkylation with methyl trifluoromethanesulfonate. The aromatization of the S-oxides 9 is achieved by O-functionalization, subsequent elimination, and consecutive deprotonation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911240332
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