Second generation analogues of RKA182: synthetic tetraoxanes with outstanding in vitro and in vivo antimalarial activities

A series of polar dispiro-1,2,4,5-tetraoxanes have been designed and synthesized by parallel synthesis. From this series, endoperoxides with activity as low as 0.2 nM have been obtained and representatives of this group have excellent oral activities in the P. berghei ANKA mouse model of malaria.