Synthesis and Biological Activity of Some Juvenile Hormone Analogs Lacking the Alkyl Substituents at C-7 or Both at C-3 and at C-7

Two groups of juvenile hormone analogs were synthesized. One lacks the alkyl substituent at C?7. The other possesses the alkyl substituents neither at C?3 nor at C?7. These analogs were almost inactive on Bombyx mori L. Some of them with the alkyl substituent at C?3, however, were active on Tenebrio molitor L. This indicates the very narrow sensitivity of Bombyx mori L. to juvenile hormone analogs.