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  • Biochemistry and Biotechnology  (2)
  • Prewashing  (1)
  • 1
    ISSN: 1573-501X
    Keywords: Solid-phase organic synthesis ; Resin impurities ; Prewashing ; Pretreatment ; Parallel purification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A major objective of the DIVERSOMER® technology is to provide pure and characterized compounds for biological testing in order to prevent ‘false negatives’ in our libraries. On several occasions, analysis of the final products by1H-NMR and MS, has revealed by-products from the polystyrene solid support. Subsequently, three alternative methods were studied to remove polystyrene by-products; (i) prewashing of the resin prior to execution of the synthesis; (ii) pretreatment of the resin with the cleavage conditions consistent with the solid-phase synthesis reaction scheme; and (iii) parallel purification.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 61 (1998), S. 7-12 
    ISSN: 0006-3592
    Keywords: tyrphostins ; directed sorting method ; solid-phase organic synthesis ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Using solid-phase organic synthesis, we have prepared a 432-member (18 × 8 × 3) sample library based on the AG 490 “tyrphostin” template. By utilizing 432 reactors each equipped with a unique radiofrequency memory ID tag, the 432 products could be obtained as discrete entities (i.e., not as mixtures) via 18 + 8 + 3, or 29 reactions. Reading each ID tag after each reaction step permitted the “directed sorting” of reactors into appropriate reaction vessels containing multiple reactors. After synthesis, all products were cleaved from the solid-phase support and lyophilized to afford powders. Characterization of 5% of the library members by NMR and mass spectrometry provided verification of structure. In addition, TLC analysis of every library member provided evidence that most (or all) are composed of a single major organic compound. Some 88% of these samples were obtained in amounts of between 5 and 19 mg. Using this reaction sequence and the “directed sorting” approach, the synthesis of much larger AG 490-based libraries can be envisioned. © 1998 John Wiley & Sons, Inc. Biotechnol Bioeng (Comb Chem) 61:7-12, 1998.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 61 (1998), S. 77-79 
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: No abstract.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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