The (10R,11S)-(+)-juvenile hormones I (1) and II (2) were synthesized by Sh
arpless asymmetric dihydroxylations of methyl (2E,6E, 10E)-7-ethyl-3, 11-di
methyl-2,6,10-tridecatrienoate (4) and methyl (2E,6E,10E)-3,7,11-trimethyl-
2,6,10-tridenoate (5), respectively, as the key steps.