304902-07-6Relevant academic research and scientific papers
Synthesis of cytostatic tetradecacyclic pyrazines and a novel reduction-oxidation sequence for spiroketal opening in sapogenins
Baesler, Siegfried,Brunck, Annette,Jautelat, Rolf,Winterfeldt, Ekkehard
, p. 1854 - 1880 (2000)
Aiming towards spiroketal-modified artificial cephalostatin molecules, two orthogonal approaches were investigated. First, the introduction of 17-O-functionality into hecogenin derivatives with a closed spiroketal moiety was accomplished by different remote-oxidation procedures. These allowed the synthesis of tetradecacyclic artificial cephalostatin molecules with improved tumor-inhibiting properties. Second, a novel reduction-oxidation pathway for spiroketal opening in sapogenins was discovered, which should provide the basis for a broad access towards spiroketal-modified building blocks for cephalostatins.
