Following the screening of an in-house natural product database, 1-phenanthryltetrahydroisoquinoline analogues were synthesized as novel PAK4 inhibitors.
A newseries of novel 1-phenanthryl-tetrahydroisoquinoline derivatives were designed, synthesized and biologically evaluated for their PAK4 inhibitory activities and anti-proliferative effects against three cancer cell lines A549, MCF-7 and HT-1080. Among them, compound 12a exhibited the most potent inhibitory activity against PAK4 with an IC50 value of 0.42 μM. Moreover, this compound inhibited the
Iron(III) chloride has been used to prepare polymethoxy-substituted phenanthrene-9-carboxylic acid via intramolecular oxidative coupling at room temperature in excellent yields. Mild reaction conditions and the use of environmentally friendly FeCl3 provide a novel practical route for the synthesis of the important phenanthrene ring. The further application of this protocol as the key step to total