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    • 5. 发明授权
    • Optically active compound and method for producing same
    • 光学活性化合物及其制备方法
    • US06326520B1
    • 2001-12-04
    • US09377688
    • 1999-08-20
    • Akihiro IshiiKoichi Mikami
    • Akihiro IshiiKoichi Mikami
    • C07C49213
    • C07F7/1892B01J31/223B01J2231/341B01J2531/0266B01J2531/46C07C43/1787C07C45/30C07C49/82
    • The invention relates to a method for producing a novel optically active compound represented by the general formula [IV]. This method includes the step of reacting a vinyl ether with a halogenated acetaldehyde in the presence of an optically active binaphthol-titanium complex. With this, the novel optically active compound can be produced very easily. Furthermore, the novel optically active compound can easily be oxidized to a novel optically active &agr;,&bgr;-dihydrexyketone represented by the general formula [V]. These novel optically active compounds can each be used as useful intermediates. where R is a lower alkyl group or —Si(R3)3, where R3 is a lower alkyl group and three of R3 may be the same or different groups, R1 is a lower alkyl group or a substituted or unsubstituted phenyl group, R2 is hydrogen atom or a lower alkyl group or a substituted or unsubstituted phenyl group, or R1 and R2 are combined to form an alkylene group, and X is hydrogen, fluorine, chlorine or bromine with a proviso that three of said X may be the same or different atoms, but are not hydrogen at the same time.
    • 本发明涉及一种由通式[Ⅳ]表示的新的光学活性化合物的制备方法。 该方法包括在光学活性联萘酚钛络合物存在下使乙烯基醚与卤代乙醛反应的步骤。 由此,可以非常容易地制造新颖的光学活性化合物。 此外,新的光学活性化合物可以容易地被氧化成由通式[V]表示的新的光学活性α,β-二羟基酮。 这些新的光学活性化合物各自可用作有用的中间体。其中R是低级烷基或-Si(R3)3,其中R3是低级烷基,R3中的三个可以是相同或不同的基团,R1是 低级烷基或取代或未取代的苯基,R 2为氢原子或低级烷基或取代或未取代的苯基,或R 1和R 2结合形成亚烷基,X为氢,氟,氯或溴 条件是所述X中的三个可以是相同或不同的原子,但不是同时是氢。
    • 10. 发明授权
    • Process for producing α-trifluoromethyl-α,β-unsaturated ester
    • α-三氟甲基-α,β-不饱和酯的制备方法
    • US08653295B2
    • 2014-02-18
    • US13060565
    • 2009-09-24
    • Akihiro IshiiManabu YasumotoTakako YamazakiKaori MogiKazunori MoriTakashi Masuda
    • Akihiro IshiiManabu YasumotoTakako YamazakiKaori MogiKazunori MoriTakashi Masuda
    • C07C69/76
    • C07C67/317C07C67/327C07C69/65
    • An α-trifluoromethyl-α,β-unsaturated ester can be produced by reacting an α-trifluoromethyl-α-hydroxy ester with sulfuryl fluoride (SO2F2) in the presence of an organic base. It is preferable that the raw substrate has a hydrogen atom as one β-position substituent group and either an alkyl group, a substituted alkyl group, an alkenyl group, a substituted alkenyl group, an aromatic ring group or a substituted aromatic ring group as the other β-position substituent group. It is more preferable that an ester moiety of the raw substrate is an alkyl ester. This raw substrate is readily available. Further, the desired reaction can proceed favorably with the use of this raw substrate. It is also preferable to use either 1,5-diazabicyclo[4.3.0]non-5-ene (DBN) or 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) as the organic base. The desired reaction can proceed more favorably with the use of this organic base.
    • α-三氟甲基-α,β-不饱和酯可以通过在有机碱存在下使α-三氟甲基-α-羟基酯与硫酰氟(SO 2 F 2)反应来制备。 原料优选为具有作为一个β位取代基的氢原子,烷基,取代烷基,链烯基,取代烯基,芳香环基或取代芳环基作为 其他β位取代基。 原料的酯部更优选为烷基酯。 该原料基材容易获得。 此外,期望的反应可以有利地利用该原始基底进行。 还优选使用1,5-二氮杂双环[4.3.0]壬-5-烯(DBN)或1,8-二氮杂双环[5.4.0]十一碳-7-烯(DBU)作为有机碱。 使用该有机碱可以更有利地进行所需的反应。