40919-37-7Relevant articles and documents
3,3′-Disubstituted 5,5′-Bi(1,2,4-triazine) Derivatives with Potent in Vitro and in Vivo Antimalarial Activity
Xue, Lian,Shi, Da-Hua,Harjani, Jitendra R.,Huang, Fei,Beveridge, Julia G.,Dingjan, Tamir,Ban, Kung,Diab, Sarah,Duffy, Sandra,Lucantoni, Leonardo,Fletcher, Sabine,Chiu, Francis C.K.,Blundell, Scott,Ellis, Katherine,Ralph, Stuart A.,Wirjanata, Grennady,Teguh, Silvia,Noviyanti, Rintis,Chavchich, Marina,Creek, Darren,Price, Ric N.,Marfurt, Jutta,Charman, Susan A.,Cuellar, Matthew E.,Strasser, Jessica M.,Dahlin, Jayme L.,Walters, Michael A.,Edstein, Michael D.,Avery, Vicky M.,Baell, Jonathan B.
, (2019)
A series of 3,3′-disubstituted 5,5′-bi(1,2,4-triazine) derivatives was synthesized and screened against the erythrocytic stage of Plasmodium falciparum 3D7 line. The most potent dimer, 6k, with an IC50 (50% inhibitory concentration) of 0.008 μM, had high in vitro potency against P. falciparum lines resistant to chloroquine (W2, IC50 = 0.0047 ± 0.0011 μM) and artemisinin (MRA1240, IC50 = 0.0086 ± 0.0010 μM). Excellent ex vivo potency of 6k was shown against clinical field isolates of both P. falciparum (IC50 = 0.022-0.034 μM) and Plasmodium vivax (IC50 = 0.0093-0.031 μM) from the blood of outpatients with uncomplicated malaria. Despite 6k being cleared relatively rapidly in mice, it suppressed parasitemia in the Peters 4-day test, with a mean ED50 value (50% effective dose) of 1.47 mg kg-1 day-1 following oral administration. The disubstituted triazine dimer 6k represents a new class of orally available antimalarial compounds of considerable interest for further development.
Synthesis of 3-(Alkylamino)-, 3-(Alkoxy)-, 3-(Aryloxy)-, 3-(Alkylthio)-, and 3-(Arylthio)-1,2,4-triazines by Using a Unified Route with 3-(Methylsulfonyl)-1,2,4-triazine
Shi, Da-Hua,Harjani, Jitendra R.,Gable, Robert W.,Baell, Jonathan B.
, p. 2842 - 2850 (2016/07/07)
In our attempts to synthesize 3-(alkylthio)- and 3-(alkoxy)-1,2,4-triazines without substituents at the 5- or 6-position, the synthesis of their anticipated precursor 3-(methylsulfonyl)-1,2,4 triazine was also optimized. The reactivity of 3-(methylsulfonyl)-1,2,4-triazine towards alkyl and aryl thiols, primary and secondary alkylamines, phenols, and alcohols was explored, and the reactions were optimized to maximize the isolation of the corresponding 3-substituted 1,2,4-triazine. Good yields were obtained for the products of the reactions with all of the aforementioned nucleophiles, with the exception of alcohols, by using alkali metal carbonates. Higher yields of 3-(alkoxy)-1,2,4-triazines were obtained by using the appropriate magnesium alkoxide as the nucleophile.
