Synthesis of(2R, 3R)-epoxyneral, a sex pheromone of the acarid mite, Caloglyphus sp. (Astigmata: Acaridae)
作者:Naoki Mori、Yasumasa Kuwahara
DOI:10.1016/0040-4039(95)00063-i
日期:1995.2
(2R,3R)-Epoxy-3,7-dimethyl-6-octenal [(2R,3R)-epoxyneral] 1a, was identified from an acarid mite Caloglyphus sp. (Astigmata: Acaridae) as the sex pheromone, although its antipode (2S,3S)-epoxyneral 1b is known as a component from a few mite species without an obvious function. Both enantiomers were synthesized by asymmetric epoxidation of nerol and subsequent oxidation to aldehydes. Optical purity of each epoxynerol was improved by recrystallization of its 3,5-dinitrobenzoate. The purest 1a and 1b were unexpectedly obtained from the mother liquor during the recrystallization process.
(2R,3R)-环氧-3,7-二甲基-6-辛烯醛[(2R,3R)-环氧化橙花醛]1a被鉴定为来自甲螨属Caloglyphus sp.(Astigmata: Acaridae)的性信息素,而其相反对映体(2S,3S)-环氧化橙花醛1b已知为某些螨类中的成分,但没有明显的功能。两种对映体都是通过橙花醇的不对称环氧化和随后氧化为醛类合成的。通过重结晶环氧化橙花醇的3,5-二硝基苯甲酸酯来提高每种环氧化橙花醇的光学纯度。最纯的1a和1b意外地在重结晶过程中从母液中获得。