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公开(公告)号:US06025503A
公开(公告)日:2000-02-15
申请号:US1918
申请日:1997-12-31
申请人: Koichi Mikami , Satoru Matsukawa
发明人: Koichi Mikami , Satoru Matsukawa
IPC分类号: C07D309/38 , B01J31/22 , C07B61/00 , C07C67/31 , C07C69/732 , C07C327/22 , C07F7/00 , C07F7/28
CPC分类号: C07F7/006
摘要: Disclosed is a process for producing novel optically active titanium alkoxide complexes which are excellent in catalytic activity and enantio-selectivity in carbon-carbon bond forming reactions (for example, Ene reaction, hetero-Diels-Alder reaction, Aldol reaction) and have high stability. The present process comprises reacting (R),(S),(RS)-catalysts or mixtures thereof selected from among optically active or racemic titanium alkoxide complexes represented by the following general formula (1), etc.: ##STR1## wherein R.sup.1 represents a methyl, lower alkoxy or trihalogeno group; R.sup.2 represents a hydrogen or halogen atom; R.sup.3 represents a hydrogen atom or a methyl group; and R.sup.4 represents a lower alkyl group, or R.sup.1 and R.sup.2 may form together a cyclo ring;with chiral activators [(R),(S),(RS)-diols or mixtures thereof, but excluding reactions between a racemic modification and another racemic modification] to thereby activate exclusively one of the enantiomers.
摘要翻译: 公开了一种在碳 - 碳键形成反应(例如Ene反应,异狄尔斯 - 阿尔德反应,醛醇反应)中具有优异的催化活性和对映选择性的新型光学活性钛醇盐络合物的方法,并且具有高稳定性 。 本发明方法包括使由选自以下通式(1)表示的光学活性或外消旋烷氧基钛络合物的(R),(S),(RS) - 催化剂或其混合物反应:其中R1表示甲基, 低级烷氧基或三卤代基团; R2表示氢或卤素原子; R3表示氢原子或甲基; 并且R 4表示低级烷基,或者R 1和R 2可以一起形成环。 使用手性活化剂[(R),(S),(RS) - 二醇或其混合物,但不包括外消旋修饰与另一外消旋修饰之间的反应],从而仅活化一种对映异构体。
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公开(公告)号:US5434289A
公开(公告)日:1995-07-18
申请号:US208379
申请日:1994-03-10
IPC分类号: B01J31/22 , C07B53/00 , C07B61/00 , C07C45/51 , C07C45/67 , C07C67/333 , C07C67/343 , C07C67/38 , C07C69/675 , C07C69/708 , C07C69/712 , C07C69/732 , C07C69/734 , C07C319/20 , C07C323/22 , C07C327/28 , C07C327/32 , C07C327/00 , C07C45/00 , C07C69/76
CPC分类号: C07C327/32 , C07C327/28 , C07C45/511 , C07C67/343
摘要: A process for producing an optically active .beta.-hydroxyketone represented by formula (I): ##STR1## by catalytic asymmetrical aldol reaction is disclosed, comprising reacting a silyl-enol ether represented by formula (II): ##STR2## with a substituted aldehyde represented by formula (III):R.sup.5 CHO (III)in the presence of a binaphthol-titanium complex represented by formula (IV): ##STR3## An optically active .beta.-hydroxyketone is efficiently produced with diastereo-specificity and enantio-specificity.
摘要翻译: 公开了由式(I)表示的光学活性β-羟基酮:通过催化不对称醛醇缩合反应制备的光学活性β-羟基酮的方法,包括使由式(II)表示的甲硅烷基烯醇醚: )与由式(III)表示的取代的醛:R5CHO(III)在由式(IV)表示的联萘酚 - 钛络合物的存在下:以非对映特异性和对映体特异性有效地产生。
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公开(公告)号:US06211749B1
公开(公告)日:2001-04-03
申请号:US09310119
申请日:1999-05-12
申请人: Itsuo Yuzurihara , Satoru Matsukawa
发明人: Itsuo Yuzurihara , Satoru Matsukawa
IPC分类号: H03H740
摘要: An impedance matching device provided between a high-frequency generator and a load device matches an impedance of the high-frequency generator with an impedance of the load device and includes at least a coupled circuit which comprises a core, and a main winding and a control winding which are wound around the core. The coupled circuit changes an impedance of the impedance matching device by changing an inductance value of the main winding which depends on a magnitude of direct current flowing in the control winding.
摘要翻译: 设置在高频发生器和负载装置之间的阻抗匹配装置将高频发生器的阻抗与负载装置的阻抗相匹配,并且至少包括耦合电路,其包括芯,以及主绕组和控制 缠绕在芯上的绕组。 耦合电路通过改变主绕组的电感值来改变阻抗匹配装置的阻抗,该电感值取决于在控制绕组中流动的直流电流的大小。
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