Synthesis, Characterization, and Crystal Structure of a Phenanthroindolizine Skeleton from 18-Acetamino-7-Oxo-Dehydroabietane by Vilsmeier-Haack Reaction

Design, synthesis, cytotoxicities and DNA cleavage activities of dibenzoxepine and isoquinoline derivatives starting from dehydroabietylamine

A series of novel hexahydrodibenzoxepine and quinazoline derivatives were designed and synthesized starting from dehydroabietylamine. The cytotoxicities of the compounds against L02 and HepG2 cell lines were investigated. Meanwhile, the plasmid DNA (Escherichia coli) cleavage of several heterocyclic derivatives was studied. These compounds exhibit remarkable activities on plasmid DNA pBR322. Our study provides useful information for developing new and more potent antitumor agents.

Synthesis and antileishmanial activity of C7- and C12-functionalized dehydroabietylamine derivatives

Abietane-type diterpenoids, either naturally occurring or synthetic, have shown a wide range of pharmacological actions, including antiprotozoal properties. In this study, we report on the antileishmanial evaluation of a series of (+)-dehydroabietylamine derivatives functionalized at C7 and/or C12. Thus, the activity in vitro against Leishmania infantum, Leishmania donovani, Leishmania amazonensis and Leishmania guyanensis, was studied. Most of the benzamide derivatives showed activities at low micromolar concentration against cultured promastigotes of Leishmania spp. (IC50 = 2.2-46.8 μM), without cytotoxicity on J774 macrophage cells. Compound 15, an acetamide, was found to be the most active leishmanicidal agent, though it presented some cytotoxicity on J774 cells. Among the benzamide derivatives, compounds 8 and 10, were also active against L. infantum intracellular amastigotes, being 18- and 23-fold more potent than the reference compound miltefosine, respectively. Some structure-activity relationships have been identified for the antileishmanial activity in these dehydroabietylamine derivatives.