中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

210 records (took 0.023 seconds)

    PROCESS FOR PRODUCING DICARBOXYLIC ACIDS
    51.
    发明专利
    PROCESS FOR PRODUCING DICARBOXYLIC ACIDS 未知

    公开(公告)号：CA2436939C

    公开(公告)日：2007-10-09

    申请号：CA2436939

    申请日：2001-12-07

    Applicant: DAICEL CHEM

    Inventor： ISHII YASUTAKA ,  KAJIKAWA YASUTERU

    IPC: C07C51/31 ,  C07B61/00 ,  C07C55/14 ,  C07C55/21

    Abstract: A process of the present invention produces a corresponding dicarboxylic acid by oxidative cleavage of a cycloalkane with oxygen and performs a reaction in the presence of a catalyst including an imide compound and a metallic compound, the imide compound having a cyclic imide skeleton represented by following Formula (I): wherein X is an oxygen atom or an-OR group, and wherein R is a hydrogen atom or a hydroxyl-protecting group, under conditions of a reaction temperature of 80.degree.C or higher and a concentration of the cycloalkane in a system of 21% by weight or more. The imide compound includes, for example, N-hydroxyphthalimide. The amount of the imide compound is, for example, from about 0.000001 to about 0.01 mole per mole of the cycloalkane. In the production of a corresponding dicarboxylic acid by catalytic oxidation of a cycloalkane with oxygen, the present invention can yield the dicarboxylic acid in a high space time yield even using a small amount of the catalyst.

    53.
    发明专利
    未知

    公开(公告)号：DE60024216T2

    公开(公告)日：2006-06-01

    申请号：DE60024216

    申请日：2000-04-07

    Applicant: DAICEL CHEM

    Inventor： ISHII YASUTAKA ,  FUNAKI YOSHINORI ,  NAKANO TATSUYA

    IPC: C08J7/12 ,  C08J3/00

    Abstract: An invented method for the surface modification of a molded plastic treats a molded plastic with an oxygen-atom-containing gas such as oxygen, carbon monoxide, a nitrogen oxide, or a sulfur oxide in the presence of N-hydroxyphthalimide or another imide compound represented by the following formula (1): wherein R and R are each, identical to or different from each other, a hydrogen atom, a halogen atom, an alkyl group, an aryl group, a cycloalkyl group, a hydroxyl group, an alkoxy group, a carboxyl group, an alkoxycarbonyl group, or an acyl group, or R and R may be combined to form a double bond or an aromatic or non-aromatic ring; X is an oxygen atom or a hydroxyl group. An invented method for modifying a polymer treats a polymer with an oxygen-atom-containing gas such as oxygen, carbon monoxide, a nitrogen oxide, or a sulfur oxide in the presence of the imide compound represented by the formula (1).

    54.
    发明专利
    未知

    公开(公告)号：DE60109786T2

    公开(公告)日：2005-08-18

    申请号：DE60109786

    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

    Abstract: A process of the present invention produces a hydroxylactone by subjecting an unsaturated carboxylic acid having a double bond not conjugated to a carboxyl group or an ester thereof to (i) a reaction with hydrogen peroxide in the presence of a metallic compound containing a metallic element selected from W, Mo, V and Mn or (ii) a reaction with a peroxide containing the metallic element to thereby yield a corresponding hydroxylactone having a hydroxyl group combined with one of carbon atoms constituting the double bond and being cyclized at the other carbon atom position. The metallic compound may be one selected from oxides, oxoacids and salts thereof. The unsaturated carboxylic acid includes, for example, beta , gamma -unsaturated carboxylic acids, gamma , delta -unsaturated carboxylic acids, and delta , epsilon -unsaturated carboxylic acids. The process can produce hydroxylactones in high yields at low cost.

    56.
    发明专利
    未知

    公开(公告)号：DE60012240D1

    公开(公告)日：2004-08-26

    申请号：DE60012240

    申请日：2000-01-25

    Applicant: DAICEL CHEM

    Inventor： ISHII YASUTAKA ,  NAKANO TATSUYA

    IPC: B01J27/08 ,  C07B61/00 ,  C07D263/04 ,  C07D263/52

    Abstract: A process produces 1,3-oxazolidine derivatives by reacting an imine derivative of the following formula (1): with an epoxy compound of the following formula (2): to yield an oxazolidine derivative of the following formula (3): A compound of Group 3 elements of the Periodic Table of Elements, or other metallic compounds can be used as a catalyst. In the formulae, R , R , R , R , R , and R are each, independently, a hydrogen atom, a hydrocarbon group, or a heterocyclic group, and R is a hydrogen atom, a hydrocarbon group, a heterocyclic group, a hydroxyl group, a substituted oxy group, or an amino group which may have a substituent, where a combination of R and R , R and R , R and R , or R and R may be combined to form a ring with the adjacent carbon atom or carbon-carbon bond. The process can easily yield 1,3-oxazolidine derivatives from readily available materials.

Patent Agency Ranking