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A series of antimalarial chiral 1,2,4-trioxanes (1–8) were synthesised in high enantiomeric purities. Enantioselective addition of R 2 Zn reagent to 3-methyl-2-butenal catalysed by (+)-MIB or (−)-MIB yielded both the enantiomers of the chiral allylic alcohols 9–11 (90–98% ee), which were subjected to diastereoselective photooxygenation in the presence of tetraphenylporphine (TPP) to obtain...
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