Insect juvenile hormone prepn - and intermediate allyl - alcohols and ketones

摘要

Juvenile hormone (methyl trans, or trans, cis-10-epoxy-7-ethyl-3,11-dimethyl-2,6-tridecanoate) and its homologues of formula (I) are produced by the reaction scheme. SN1 right arrow halogenation reduction right arrow epoxidation right arrow (R1-R4 = lower alkyl). New intermediates in the prodn. of (I) of formula (II) and (III) are also claimed. CH2= -X-(CH2)2-Y-Z Hal-CH2- =CH-(CH2)2-R2-A in which R3 is H, hydrocarbon or halogen, X is -CHOH- or CO, Y is a divalent hydrocarbon radical, Z is a functional group, R1 and R2 are hydrocarbon, and A is a functional group.