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    • 3. 发明申请
    • 光学活性ラクトン類の製造方法
    • 生产光学活性乳液的方法
    • WO2004106320A1
    • 2004-12-09
    • PCT/JP2004/006919
    • 2004-05-14
    • 日本ゼオン株式会社遠藤 正弘中野 靖之山田 俊郎
    • 遠藤 正弘中野 靖之山田 俊郎
    • C07D309/30
    • C07D307/935C07D309/30
    • A process for producing an optically active lactone which comprises reacting a hydroxycarboxylic ester (A) obtained by the reaction of a racemic modification of a lactone with an alcohol with a 1-alkoxybicyclo[3.3.0]-2-oxaoctane represented by the formula [1], a 1-hydroxybicyclo[3.3.0]-2-oxaoctane represented by the formula [2], or a bicyclo[3.3.0]-2-oxa-1-octene represented by the formula [3] to form a diastereomer mixture (B), separating the diastereomer mixture (B) into the diastereomers, decomposing at least one of the diastereomers separated to form a hydroxycarboxylic ester (C), and causing the hydroxycarboxylic ester (C) to undergo cyclization to thereby obtain the (R) or (S) isomer of the lactone. The (R) or (S) isomer of a lactone which is useful as a perfume can be efficiently obtained.
    • 一种制备光学活性内酯的方法,该方法包括使通过内酯的外消旋改性反应获得的羟基羧酸酯与醇与式[1]所代表的1-烷氧基双环[3.3.0] -2-氧代辛烷反应, 1],由式[2]表示的1-羟基双环[3.3.0] -2-氧代辛烷或由式[3]表示的双环[3.3.0] -2-氧杂-1-辛烯,形成 非对映异构体混合物(B),将非对映异构体混合物(B)分离成非对映异构体,分解至少一种分离的非对映异构体以形成羟基羧酸酯(C),并使羟基羧酸酯(C)进行环化,由此获得( R)或(S)异构体。 可以有效地获得可用作香料的内酯的(R)或(S)异构体。