Potential juvenile hormone activity. Preparation of fatty .beta.-methylcrotonyl and 3,4-methylenedioxyphenyl derivatives

Insect juvenile hormone activity of alkyl (2E,4E)-3,7,11-trimethyl-2,4-dodecadienoates. Variations in the ester function and in the carbon chain

“…Wakabayashi et al, 1969) and compounds such as 147,148, and 155 which possess only the 3-methyl branch still have low activity (cf. Bell et al, 1973). Analogues such as 149 which possess branches at C-3 and at C-ll but not at C-7 show some activity but not as high as the 3,7,11-trimethyl-2,4-dienoates (e.g., 2).…”