Virgin females of the parasitoid wasp Trichogramma turkestanica produce minute amounts of a sex pheromone, the identity of which has not been fully established. The enantioselective synthesis of a putative component of this pheromone, (6S,8S,10S)-4,6,8,10-tetramethyltrideca-2E,4E-dien-1-ol (2), is reported as a contribution to this identification. Catalytic asymmetric conjugate addition of methylmagnesium bromide and stereoselective Horner–Wadsworth–Emmons olefinations are used as the key steps, and 2 was obtained in 16 steps with an overall yield of 4.4%.
寄生性蜂
Trichogramma turkestanica的处女雌性产生微量的性信息素,其身份尚未完全确定。这篇文章报告了一种假定为该信息素成分的(6
S,8
S,10
S)-4,6,8,10-四
甲基十
三烯-2
E,4
E-二醇(
2)的对映选择性合成,作为对其鉴定的贡献。催化不对称共轭加成
甲基溴化镁和立体选择性Horner–Wadsworth–Emmons
烯烃化反应被用作关键步骤,
2经过16个步骤得到,总收率为4.4%。