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    PROCESSES FOR PRODUCING DIALDEHYDE MONOACETALS
    4.
    发明公开
    PROCESSES FOR PRODUCING DIALDEHYDE MONOACETALS 审中-公开
    用于单缩醛二醛的制备

    公开(公告)号：EP0987261A4

    公开(公告)日：2003-02-05

    申请号：EP99905217

    申请日：1999-02-17

    Applicant: DAICEL CHEM

    Inventor： TANAKA YASUTAKA ,  UENAKAI HIROAKI ,  SHIMADA GIICHI

    IPC: C07D317/26 ,  C07D317/22

    CPC classification number: C07D317/26

    Abstract: A process for producing a dialdehyde monoacetal (III) from a dialdehyde (I) and a diol (II), characterized by reacting the dialdehyde (I) with twice or more, on the molar basis, as much the diol (III) to give a dialdehyde bisacetal (IV) and then reacting this dialdehyde bisacetal (IV) with a dialdehyde (III); and a process for producing glutaraldehyde monoacetal by reacting 2-Y-3,4-dihydro-2H-pyran with a diol, characterized by reacting in the second step glutaraldehyde (iv) formed as a by-product with glutaraldehyde bisacetal (v) formed as another by-product to give glutaraldehyde monoacetal (iii).

    PROCESS FOR PREPARING ALPHA-PHENYLPROPIONIC ACID DERIVATIVE
    8.
    发明专利
    PROCESS FOR PREPARING ALPHA-PHENYLPROPIONIC ACID DERIVATIVE 未知

    公开(公告)号：GB2199030B

    公开(公告)日：1990-09-05

    申请号：GB8723895

    申请日：1987-10-12

    Applicant: DAICEL CHEM

    Inventor： TANAKA YASUTAKA ,  KOJIMA HIDETAKA ,  TSUJI YASUO

    IPC: B01J27/13 ,  B01J27/00 ,  C07B61/00 ,  C07C51/00 ,  C07C51/12 ,  C07C51/48 ,  C07C57/30 ,  C07C67/00

    Abstract: A process for preparing an alpha -phenylpropionic acid derivative wherein an alpha -phenylethyl alcohol derivative is reacted with carbon monoxide in the presence of a catalyst to give an alpha -phenylpropionic acid derivative, which comprises carrying out the reaction in either one of the following manners (I), (II) and (III): (i) effecting said reaction in the presence of a rhodium catalyst, as said catalyst, together with an iodine compound in such an amount as to give a Rh to I ratio on an atomic basis of 1:0.5 to 1:6; adjusting the concentration of water in the reaction mixture to a level of 2 mol/l or below; and employing a reaction temperature of 130 DEG C. or below, (II) employing a mixture of a hydrocarbon and an oxygen-containing organic compound as a solvent, or (III) effecting said reaction in the presence of a rhodium catalyst, as said catalyst, and an iodine compound; adding water optionally together with an oxygen-containing organic compound as an extraction solvent to the resulting reaction mixture to thereby separate the same into two layers, i.e., a layer containing the reaction product and an aqueous layer; and repeatedly using the rhodium catalyst contained in said aqueous layer.

    PROCESS FOR PREPARING OX-PHENYLPROPIONIE ACID
    9.
    发明专利
    PROCESS FOR PREPARING OX-PHENYLPROPIONIE ACID 未知

    公开(公告)号：GB2199030A

    公开(公告)日：1988-06-29

    申请号：GB8723895

    申请日：1987-10-12

    Applicant: DAICEL CHEM

    Inventor： TANAKA YASUTAKA ,  KOJIMA HIDETAKA ,  TSUJI YASUO

    IPC: B01J27/13 ,  B01J27/00 ,  C07B61/00 ,  C07C51/00 ,  C07C51/12 ,  C07C51/48 ,  C07C57/30 ,  C07C67/00

    Abstract: A process for preparing an alpha -phenylpropionic acid derivative wherein an alpha -phenylethyl alcohol derivative is reacted with carbon monoxide in the presence of a catalyst to give an alpha -phenylpropionic acid derivative, which comprises carrying out the reaction in either one of the following manners (I), (II) and (III): (i) effecting said reaction in the presence of a rhodium catalyst, as said catalyst, together with an iodine compound in such an amount as to give a Rh to I ratio on an atomic basis of 1:0.5 to 1:6; adjusting the concentration of water in the reaction mixture to a level of 2 mol/l or below; and employing a reaction temperature of 130 DEG C. or below, (II) employing a mixture of a hydrocarbon and an oxygen-containing organic compound as a solvent, or (III) effecting said reaction in the presence of a rhodium catalyst, as said catalyst, and an iodine compound; adding water optionally together with an oxygen-containing organic compound as an extraction solvent to the resulting reaction mixture to thereby separate the same into two layers, i.e., a layer containing the reaction product and an aqueous layer; and repeatedly using the rhodium catalyst contained in said aqueous layer.

    PREPARATION METHOD FOR UNSATURATED CYCLIC ALCOHOLS
    10.
    发明专利
    PREPARATION METHOD FOR UNSATURATED CYCLIC ALCOHOLS 失效

    公开(公告)号：JP2002322103A

    公开(公告)日：2002-11-08

    申请号：JP2001132080

    申请日：2001-04-27

    Applicant: DAICEL CHEM

    Inventor： NISHIYAMA SATORU ,  TANAKA YASUTAKA

    IPC: C07C29/14 ,  C07B61/00 ,  C07C33/05 ,  C07C33/14

    Abstract: PROBLEM TO BE SOLVED: To obtain the corresponding unsaturated cyclic alcohols at a high conversion rate and with a high selectivity from unsaturated cyclic aldehydes possessing unsaturated bonds within a cyclic group. SOLUTION: In the presence of a catalyst containing at least one species of metals selected from the group III, IV, IX, XIII and XIV of the periodic table and a secondary alcohol the corresponding unsaturated cyclic alcohol compound is prepared by reducing selectively the formyl group of the unsaturated cyclic aldehydes without reducing the unsaturated carbon - carbon bonds. As the unsaturated cyclic aldehydes, C5-16 mono- or tri-cyclo-alkenecarbaldehyde and the like can be employed. The reduction reaction may be carried out at 40-120 deg.C and under the hydrogen gas pressure of roughly 0.01-5 MPa.

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