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    PROCESS FOR PRODUCING HYDROXYLACTONE
    72.
    发明公开
    PROCESS FOR PRODUCING HYDROXYLACTONE 有权
    用于生产hydroxylactones

    公开(公告)号：EP1302469A4

    公开(公告)日：2004-02-04

    申请号：EP01951895

    申请日：2001-07-18

    Applicant: DAICEL CHEM

    Inventor： ISHII YASUTAKA ,  NAKANO TATSUYA ,  INOUE KEIZO

    IPC: C07D307/32 ,  C07D307/935 ,  C07D309/30 ,  C07D307/93

    CPC classification number: C07D307/935 ,  C07D307/32 ,  C07D309/30

    Abstract: A process for producing a hydroxylactone which comprises reacting an unsaturated carboxylic acid or an ester thereof each having a double bond not conjugated with the carboxyl group with (i) hydrogen peroxide in the presence of a metal compound containing a metal element selected among tungsten, molybdenum, vanadium, and manganese or with (ii) a peroxide containing the metal to generate the corresponding hydroxylactone in which a hydroxyl group is bonded to one of the carbon atoms constituting the double bond and which has cyclized at the other carbon atom. As the metal compound can be used a compound selected among oxides, oxyacids, and salts thereof. Examples of the unsaturated carboxylic acid include β, η -unsaturated carboxylic acids, η, δ -unsaturated carboxylic acids, and δ, ε -unsaturated carboxylic acids. By the process, a hydroxylactone can be inexpensively produced in high yield.

    PROCESS FOR THE PREPARATION OF ESTERS OR LACTONES
    73.
    发明公开
    PROCESS FOR THE PREPARATION OF ESTERS OR LACTONES 审中-公开
    用于生产酯类和内酯类

    公开(公告)号：EP1078922A4

    公开(公告)日：2002-08-21

    申请号：EP00904082

    申请日：2000-02-22

    Applicant: DAICEL CHEM

    Inventor： ISHII YASUTAKA ,  NAKANO TATSUYA

    IPC: B01J27/10 ,  B01J27/125 ,  B01J27/135 ,  B01J31/02 ,  C07C67/42 ,  C07D307/33 ,  C07D313/04 ,  C07D313/06 ,  C07D315/00

    CPC classification number: C07D307/33 ,  C07D313/06 ,  C07D315/00

    Abstract: A process for the preparation of esters or lactones, which comprises reacting a ketone represented by general formula (1) (wherein R?a and Rb¿ are each independently an organic group having a carbon atom at the position where the carbonyl carbon atom adjacent thereto is bonded, or alternatively R?a and Rb¿ together with the carbonyl carbon atom may form a ring) with hydrogen peroxide in the presence of a compound containing a metallic element selected from among Group 3, 13, 14 and 15 metallic elements of the periodic table to thereby obtain a compound represented by general formula (2) (wherein R?a and Rb¿ are each independently an organic group having a carbon atom at the position where the carbonyl carbon atom or oxygen atom adjacent thereto is bonded, or alternatively R?a and Rb¿ together with the carbonyl carbon atom and the oxygen atom may form a ring). This process makes it possible to convert ketones to the corresponding esters or lactones in high yield by using hydrogen peroxide.

    PROCESS FOR PREPARING ORGANIC SULFUR ACIDS OR SALTS THEREOF
    77.
    发明公开
    PROCESS FOR PREPARING ORGANIC SULFUR ACIDS OR SALTS THEREOF 有权
    用于生产有机硫或其盐

    公开(公告)号：EP1188743A4

    公开(公告)日：2005-06-15

    申请号：EP01906350

    申请日：2001-02-27

    Applicant: DAICEL CHEM

    Inventor： ISHII YASUTAKA ,  NAKANO TATSUYA

    IPC: C07B61/00 ,  C07C303/14 ,  C07C309/04 ,  C07C309/25 ,  C07C309/27

    CPC classification number: C07C303/14 ,  C07C2601/14 ,  C07C2601/18 ,  C07C2603/74 ,  C07C309/25 ,  C07C309/04

    Abstract: A process for preparing organic sulfur acids or salts thereof, which comprises reacting an organic substrate with a sulfur oxide in the presence of a metal compound catalyst in the absence of N-hydroxy- and N-oxo-cyclic imide compounds to thereby obtain the corresponding organic sulfur acid or a salt thereof. The organic substrate includes (a) methylene-bearing homo- and hetero-cyclic compounds, (b) compounds bearing methyne carbon atoms, (c) unsaturated compounds bearing methyl or methylene groups at the position adjacent to the unsaturated bond, (d) nonaromatic heterocyclic compounds having carbon-hydrogen bonds at the position adjacent to the heteroatom, (e) linear alkanes, and so on, while the sulfur oxide may be sulfur dioxide or the like. This process permits efficient production of organic sulfur acids or salts thereof under mild conditions.

    PROCESS FOR PRODUCING HYDROGEN PEROXIDE
    80.
    发明公开
    PROCESS FOR PRODUCING HYDROGEN PEROXIDE 有权
    工艺生产氢

    公开(公告)号：EP1070678A4

    公开(公告)日：2001-05-23

    申请号：EP00902029

    申请日：2000-02-01

    Applicant: DAICEL CHEM

    Inventor： ISHII YASUTAKA ,  NAKANO TATSUYA

    IPC: C01B15/026

    CPC classification number: C01B15/026

    Abstract: A process for producing hydrogen peroxide which comprises reacting a primary or secondary alcohol with oxygen in the presence of an imide compound represented by formula (1) (wherein R and R are the same or different and each represents hydrogen, halogeno, alkyl, aryl, cycloalkyl, hydroxyl, alkoxy, carboxyl, alkoxycarbonyl, or acyl, or R and R may be bonded to each other to form a double bond or an aromatic or nonaromatic ring; X represents oxygen or hydroxyl; and the groups R and R or the double bond or (non)aromatic ring containing R and R bonded to each other may contain bonded thereto one or two groups which are the same as the N-substituted cyclic imide group shown in formula (1)).

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