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  • Benzonitriles  (1)
  • Sandmeyer reaction  (1)
  • aromatic polyimides  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Synthese neuer mono- und dihalogenierter Salicylsäurederivate (1986)
    Springer
    Monatshefte für Chemie 117 (1986), S. 393-406 
    Details
    ISSN: 1434-4475
    Keywords: Salicylates ; halogenation of ; Sandmeyer reaction ; Hydrolysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Syntheses of 3- and 4-monohalogenated (2a, b; 3a–c; 4a–e) and 3,4-dihalogenated (4f–l) ethyl 5-cyano-salicylates are described. Nitration of the ethyl 5-cyano-4-halo-salicylates3a, b leads to the ethyl 5-cyano-4-halo-3-nitro-salicylates5a, b. Hydrolysis of the ester and cyano group as well as reactions of various chloroformates, N,N-dimethylcarbamyl chloride and acetic anhydride with the hydroxyl group have been studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00816534
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  • 2
    Electronic Resource
    Electronic Resource
    Synthese neuer 4-Hydroxybenzonitrilderivate und deren herbizide Eigenschaften (1987)
    Springer
    Monatshefte für Chemie 118 (1987), S. 217-228 
    Details
    ISSN: 1434-4475
    Keywords: Benzonitriles ; Halogenation ; Herbicides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The synthesis of several new derivatives of 2-amino-4-hydroxybenzonitrile2 and their herbicidal screening data are described. Thus, halogenation and furtherSandmeyer-Reaction of2 leads to the 2,3,5-trihalogenated derivatives5 a–e. Reaction of ethyl chloroformate with the amino group of2 gives6 a, acylation7 a, b and8. The 3,5-dihalogenated compounds10 a–e are obtained from6 a and7 a, b by bromination or iodation. The hydroxyl group of6 a, 7 a, b and10 a, c, e reacts with N,N-disubstituted carbamyl chlorides to give6 c, d, 9 a, b, 11, 12 and13 a, b.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00810055
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Synthesis and thermal properties of aryl-substituted rod-like polyimides (1993)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 31 (1993), S. 141-151 
    Details
    ISSN: 0887-624X
    Keywords: aromatic polyimides ; dianhydride monomers ; rod-like polymers ; aryl substitutents ; one-step polyimide synthesis ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: This article describes the synthesis and thermal characterization of novel aryl-substituted rod-like homopolyimides. Synthetic aspects of monomer syntheses and one-step polymer synthesis in m-cresol are presented. Polyimides with rod-like chain structure are based on monophenylated pyromellitic dianhydride (MPPMDA), diphenylated pyromellitic dianhydride (DPPMDA), and as rod-like diamine units on phenylated para-phenylene diamine and 1,1′-binaphthyl-4,4′-diamine. As partial flexible units, which have the possibility to be converted into an extended chain conformation, commercially available 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA) and 3,4′-oxydianiline (3,4′-ODA) were used. The polyimides were investigated with respect to solution properties and thermal behavior. © 1993 John Wiley & Sons, Inc.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1993.080310117
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    Paper (German National Licenses)
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