申请人:SHIN-ETSU CHEMICAL CO., LTD.
公开号:US20180305276A1
公开(公告)日:2018-10-25
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): R
1
CH═CH—CH═CH—CH(OR
2
)(OR
3
), including a step of subjecting a 2-enal acetal compound having a leaving group X at position C5 and being expressed by Formula (1): R
1
CHX—CH
2
—CH═CH—CH(OR
2
)(OR
3
) 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): R
1
CH═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用作合成昆虫信息素化合物的中间体的2,4-二烯醛化合物的方法。更具体地,一种方法生产公式(2)的2,4-二烯醛缩醛化合物:R1CH═CH—CH═CH—CH(OR2)(OR3),包括在碱存在下使具有在C5位置上具有离去基团X并由公式(1)表示的2-烯醛缩醛化合物经消除反应制得2,4-二烯醛缩醛化合物(2)的步骤;以及生产公式(3)的2,4-二烯醛化合物的方法:R1CH═CH—CH═CH—CHO,进一步包括去保护2,4-二烯醛缩醛化合物(2)以获得2,4-二烯醛化合物(3)的步骤。