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  • 1995-1999  (2)
  • Chemistry  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Heteroatom Chemistry 8 (1997), S. 165-175 
    ISSN: 1042-7163
    Keywords: Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The title compound 1 was allowed to react with catechol, 2,3-dihydroxynaphthalene, tetrabromocatechol, resorcinol, saligenin, and 3,5-di-tert-butylcatechol in the presence of triethylamine to form compounds 4a-4d and 4f. Whereas the catechol derivative 4a, the naphthol derivative 4b, and the tetrabromocatechol derivative 4c could be readily obtained, the saligenin derivative 4d and the 3,5-di-tert-butylcatechol derivative 4f were found to be stable only in solution. Contrary to expectation, compound 4e was not formed in the reaction of 1 with resorcinol. The reaction of 1 with 1,2,4,5-tetrahydroxybenzene led to the pentacyclic derivative 4g. Reaction of hydroquinone with 1 led to the formation of the dimeric structure 4h. Crystal structure analyses of 4a and 4b show that the nine-membered rings adopt essentially identical “tub” conformations in which the P and O atoms are coplanar. The P-C-P angles (across the CCl2 bridge) are wide (ca. 119°). © 1997 John Wiley & Sons, Inc.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 337 (1995), S. 46-49 
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The hitherto unknown stereochemistry of N,N,N′,N′-tetrasubstituted 2-arylthioacrylamides 1 has been determined by X-ray crystal analysis and systematic NMR-investigations. Provided that the 2-aryl group lacks ortho substituents, compounds 1 exist predominantly as Z-isomers. In contrast, the major isomer has an E-s-trans configuration if the 2-aryl group is ortho-substituted. Substitution of the 3-amino group of 1 by glycinates, giving 3-aminothioacrylamides 2, generally preserves the original stereochemistry.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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