synthetic route to rationallydesigned lamellarin D analogues, 1-dearyllamellarin D (1) and 1-substituted 1-dearyllamellarin D (2), has been developed. The key pentacyclic intermediate 22 was prepared by palladium-catalyzed direct arylation of 12, which in turn was synthesized via C-2-selective lithiation of 15 followed by palladium-catalyzedcross-coupling as the key reactions. Compound 22 was converted
diversity at this position. Overall, this strategy simplifies the preparation of lamellarins/azalamellarins; including the Mi-RC, these C1-structurally diverse analogues could be prepared efficiently in 6–7 steps from the easily accessed 1-acetoxymethyldihydroisoquinoline and β-nitrocinnamate. Some selected azalamellarins were evaluated for their inhibitory effect against HeLa cervical cancer cells. An acute
Despite the therapeutic potential of marine‐derived lamellarinnaturalproducts, their preclinical development has been hampered by their lipophilic nature, causing very poor aqueous solubility. In order to develop more drug‐like analogs, their structure was streamlined in this study from both the cytotoxic activity and lipophilicity standpoints. First, a modified total synthetic route was successfully