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Synthesis of Cephalostatin Analogues by Symmetrical and Non-Symmetrical Routes (1998)

Drögemüller, Michael ; Flessner, Timo ; Jautelat, Rolf ; [et al.]

Weinheim : Wiley-Blackwell

Liebigs Annalen 1998 (1998), S. 2811-2831

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Details

ISSN: 1434-193X

Keywords: Vinyl azides ; Cephalostatins ; Pyrazine formation ; Desymmetrization ; Enamino ketones ; Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: The synthesis of the cephalostatin-analogous bis-steroidal pyrazines 6, 27a/b and 41 by the transformation of the C2-symmetrical diketone 6 as a central precursor, as well as the direct preparation of several non-symmetrical bis-steroidal pyrazines by coupling of enamino ketones (5, 40) with vinyl azides (17a/b) is reported. Furthermore, an improved procedure for preparation of the diketone 6 described earlier is presented.

Additional Material: 1 Ill.

Type of Medium: Electronic Resource

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