Synthesis and Structure−Activity Relationship Study of Lamellarin Derivatives
摘要:
Ten derivatives (3-12) of marine alkaloid lamellarin D (1) were synthesized and evaluated for cytotoxicity against a HeLa cell line in an effort to examine their structure-activity relationships. It appeared that the hydroxyl groups at positions C-8 and C-20 of 1 were important structural requirements for cytotoxic activity, while the hydroxyl group at C-14 and the two methoxy groups at C-13 and C-21 were not necessary for the activity.
Total Syntheses of Lamellarin D and H. The First Synthesis of Lamellarin-Class Marine Alkaloids
摘要:
Total syntheses of marine polyaromatic alkaloids, lamellarin D (1) and H (2), are described. The pentacyclic lamellarin ring system was constructed by B-ylide mediated pyrrole ring formation and subsequent lactonization of 4 obtained by an assembly of known benzylisoquinoline 5, benzoate 6 and ethyl bromoacetate. (C) 1997 Elsevier Science Ltd.