Several stereoselective syntheses of (E)-2-ethyl-6-methyl-5-octenoic acid (17) are described. The dianion of pure 17 was subsequently coupled with (E)-β-thujaketonic acid methyl ester (5), derived from thujone (1), to give the β-lactones 45 and 46 which were then epoxidized and pyrolyzed exemplifying a route to juvenile hormone analogues such as 51 and 54.
描述了 (E)-2-乙基-6-甲基-5-
辛烯酸 (17) 的几种立体选择性合成。纯 17 的二价阴离子随后与衍生自 thujone (1) 的 (E)-β-thujaketonic 酸甲酯 (5) 偶联,得到 β-内酯 45 和 46,然后将其环氧化和热解,举例说明一条通往幼年的途径激素类似物,如 51 和 54。