10.1071/CH9781769
The research focuses on the synthesis of various polycyclic quinazoline compounds, which are structural analogues of tetrodotoxin, a potent neurotoxin found in certain marine animals. The key intermediate used in the synthesis is 2-oxoadamantane-1-carboxamide (12), which is prepared from adamantan-2-one (7) through a series of reactions involving diazomethane, selenium dioxide, and thionyl chloride. The resulting intermediate (12) is then subjected to reductive amination to produce 2-amino-adamantane-1-carboxamide (14), which can be further transformed into various target compounds such as 3,5-diazatetracyclo[7,3,1,17~11,01~6]tetradecane-4-iminium sulfate (3), 3,5-diazatetracyclo[7,3,1,17~11,01~6]tetradecan-4-one (4), and 3,5-diazatetracyclo[7,3,1,17~11,01~6]tetradecane (5) dipicrate. Other related compounds like 3-oxa-4-azatetracyclo[6,3,1,16~10,O115]tridec-4-en-2-one (15) and 3,4-diazatetracyclo[6,3,1,16~10,O115]tridec-4-en-2-one (16) are also synthesized. The study aims to explore the stability and potential biological activities of these compounds, which are expected to be more stable than the toxin due to their cage-like structure.
10.1016/j.bmcl.2010.06.045
The research focuses on the development of a new series of 6-(40-aryloxy-phenyl)vinyl-1,2,4-trioxanes, specifically compounds 10a–d, 11a–d, and 12a–d, which were synthesized and evaluated for their antimalarial activity against multidrug-resistant Plasmodium yoelii in Swiss mice via the oral route. The purpose of this study was to find structurally simpler, more affordable, and effective synthetic trioxanes that could combat multidrug-resistant malaria. The most active compounds in the series, trioxanes 10b and 10c, demonstrated 100% protection at a dose of 48 mg/kg over four days, comparable to the clinically useful drug β-arteether. The chemicals used in the synthesis process included various aryl alkoxyphenyl vinyl compounds, cyclopentanone, cyclohexanone, 2-adamantanone, and other reagents involved in the photooxygenation and acid-catalyzed condensation steps. The study concluded that cyclopentane-based trioxanes 10b and 10c showed promising activity profiles similar to that of β-arteether, indicating their potential as effective antimalarial agents.