The present invention provides an efficient synthetic method of &agr;-ketol unsaturated fatty acid having a double bond at a &bgr;-position to the ketone group thereof. It comprises the steps of: preparing compound (4) by reacting monosubstituted acetylene (2) with epoxide (3); and preparing &agr;-ketol unsaturated fatty acid (1) from said compound (4) as shown in Reaction Formula 1:
1
wherein R
1
represents an alkyl group of 1-18 carbon atoms or an aliphatic hydrocarbon group of 2-18 carbon atoms having 1-5 double or triple bonds at given positions; R
2
represents a protecting group for a hydroxyl group; R
3
represents a protecting group for a carboxyl group; R is identical to R
1
or, when R
1
has one or more triple bonds, represents an aliphatic hydrocarbon group in which each triple bond of R
1
is converted to a double bond; and A represents an alkylene group of 1-18 carbon atoms.
本发明提供了一种高效的合成方法,用于具有双键位于其β-位置的α-酮烯酸。它包括以下步骤:通过将单取代
乙炔(2)与
环氧化物(3)反应制备化合物(4);并从所述化合物(4)制备α-酮烯酸(1),如反应式1所示:其中R1表示碳原子数为1-18的烷基基团或碳原子数为2-18的脂肪烃基团,在给定位置具有1-5个双键或三键;R2表示羟基的保护基团;R3表示羧基的保护基团;R与R1相同,或者当R1具有一个或多个三键时,表示将R1的每个三键转化为双键的脂肪烃基团;A表示碳原子数为1-18的亚烯基团。