Serricornin is a female-produced sex pheromone of the cigarette beetle (Lasioderma serricorne), which is a pest of dried foodstuffs and tobacco. We report a versatile and short synthesis of all possible 6,7-syn-isomers of serricornin, including the natural isomer. Starting from the SAMP and RAMP derivatives of diethyl ketone we obtained four different enantiopure and diastereomerically pure serricornins. The main advantage of this method is that only a single kind of chiral starting material is needed for the construction of three stereogenic centers. During the synthesis further useful intermediates including (R)- and (S)-1-benzyloxy-2-methylpentan-3-one (4) and (2S,3R)- and (2R,3S)-1-iodo-3-(methoxy- methoxy)-2-methylpentane (9) were obtained.
蚁齿象素(Serricornin)是烟草甲虫(Lasioderma serricorne)的雌性产生的性信息素,这种害虫危害干粮和烟草。我们报道了一种多功能且短的合成方法,可以合成所有可能的6,7-syn异构体的蚁齿象素,包括
天然异构体。从
二乙基酮的
SAMP和
RAMP衍
生物出发,我们得到了四种不同的对映纯和对映异构纯的蚁齿象素。这种方法的主要优点是只需要一种手性起始物质就可以构建三个立体中心。在合成过程中,还获得了其他有用的
中间体,包括(R)-和(S)-1-苄
氧基-
2-甲基戊
酮(4)以及(2S,3R)-和(2R,3S)-1-
碘-3-(甲
氧基甲
氧基)-
2-甲基戊烷(9)。