Methods of producing a 2,4-dienal acetal compound and a 2,4-dienal compound useful as synthesis intermediates of a sex pheromone compound having a conjugated diene structure or a conjugated triene structure. More specifically, a method produces a 2,4-dienal acetal compound of Formula (2): R1CH═CH—CH═CH—CH(OR2)(OR3), including a step of subjecting a 2-enal acetal compound having a leaving group X at position C5 and being expressed by Formula (1): R1CHX—CH2—CH═CH—CH(OR2)(OR3) to an elimination reaction in the presence of a base to obtain the 2,4-dienal acetal compound (2); and a method for producing a 2,4-dienal compound of Formula (3): R1CH═CH—CH═CH—CHO, further including a step of deprotecting the 2,4-dienal acetal compound (2) to obtain the 2,4-dienal compound (3).
生产 2,4-二烯醛
缩醛化合物和 2,4-二烯醛化合物的方法,可用作具有共轭二烯结构或共轭
三烯结构的性信息素化合物的合成中间体。更具体地说,一种方法可制得式(2)的 2,4-二烯醛
缩醛化合物:R1CH═CH-CH═CH-CH(OR2)(OR3),包括将在 C5 位上具有离去基团 X 并由式(1)表示的 2-烯醛
缩醛化合物:R1CHX-
CH2-CH═CH-CH(OR2)(OR3)在碱存在下进行消去反应,得到2,4-二烯醛
缩醛化合物(2);以及生产式(3)的2,4-二烯醛化合物的方法:R1CH═CH-CH═CH-CHO,进一步包括对 2,4-二烯醛
缩醛化合物 (2) 进行脱保护反应以得到 2,4-二烯醛化合物 (3) 的步骤。