中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

33 records (took 0.026 seconds)

    NOVEL N-GLYCOSIDE AND ITS PRODUCTION
    7.
    发明专利
    NOVEL N-GLYCOSIDE AND ITS PRODUCTION 失效

    公开(公告)号：JP2000072792A

    公开(公告)日：2000-03-07

    申请号：JP24390898

    申请日：1998-08-28

    Applicant: AGENCY IND SCIENCE TECHN

    Inventor： GAMA YASUO ,  SHIBUYA ISAO ,  SHIMIZU MASAO

    IPC: C07H19/12

    Abstract: PROBLEM TO BE SOLVED: To obtain the subject novel N-glycoside that is useful as a physiologically active compound or its intermediate compound from a readily available raw material. SOLUTION: This novel compound is an N-glycoside represented by formula I (Z is 2,3,4,6-tetra-O-acetyl-β-D-gluco-pyranosyl; R1 and R2 are each an alkyl, an aryl, an aralkyl or the like), typically 1-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)-6- diethylamino-1,3,5-triazine-2,4-dione. The compound of formula I is readily prepared in high yield, for example, by allowing silver cyanate to react with an N-glycosyl-N',N'-disubstituted thiourea represented by formula II (Z1 is 2,3,4,6- tetra-O-acetyl-β-D-glucopyranosyl). The compound of formula I is useful as an intermediate for fine chemical products as medicines, agrochemicals and the like or as a physiologically active substance.

    PRODUCTION OF 2,6-DIMETHYL-4-ALKOXYMETHYLPHENOLS
    8.
    发明专利
    PRODUCTION OF 2,6-DIMETHYL-4-ALKOXYMETHYLPHENOLS 失效

    公开(公告)号：JPH0477447A

    公开(公告)日：1992-03-11

    申请号：JP19006690

    申请日：1990-07-18

    Applicant: AGENCY IND SCIENCE TECHN

    Inventor： SHIMIZU MASAO ,  TAKEHIRA KATSUOMI ,  HAYAKAWA TAKASHI ,  WATANABE YOSHITO ,  ORITA HIDEO

    IPC: B01J31/02 ,  B01J31/28 ,  C07B61/00 ,  C07C41/01 ,  C07C43/205 ,  C07C43/23

    Abstract: PURPOSE:To obtain the subject compound useful as a synthetic intermediate for perfumery, pharmaceuticals, agricultural chemicals, functional polymers, etc., in improved yield at a low cost by oxidizing 2,4,6-trimethylphenol with oxygen in the presence of an alcohol and a specific catalyst. CONSTITUTION:The objective compound can be produced by oxidizing 2,4,6- trimethylphenol with oxygen in the presence of an alcohol and a catalyst consisting of a combination of a copper compound and various nitrogen compounds selected from amines and oximes, and preferably further reacting the reaction product with a 1-8C lower aliphatic alcohol or a mixture of an aromatic hydrocarbon and a 1-8C lower aliphatic alcohol as a reactant and solvent. The amount of the oxime to be used in combination with the copper compound is 0.3-3mol per 1mol of the copper compound. The amount of the amine is preferably 1mol per 1mol of copper.

    PRODUCTION OF KETENIMINE
    10.
    发明专利
    PRODUCTION OF KETENIMINE 失效

    公开(公告)号：JP2001058977A

    公开(公告)日：2001-03-06

    申请号：JP23299999

    申请日：1999-08-19

    Applicant: AGENCY IND SCIENCE TECHN

    Inventor： SHIMIZU MASAO ,  SHIBUYA ISAO ,  GAMA YASUO

    IPC: C07C249/02 ,  C07C251/10 ,  C07C251/16

    Abstract: PROBLEM TO BE SOLVED: To obtain a ketenimine in a high yield under a mild condition without causing the environmental pollution problem by reacting a thioamide compound with a haloiminium salt. SOLUTION: The objective compound of formula III (e.g. N- benzylphenylketenimine) is obtained by desulfhydrating reaction of a compound of formula I (R1 and R2 are each H, an alkyl or an aryl; R3 is an alkyl or an aryl with proviso that the case of R1, R2 and R3 of all an aryl is omitted), e.g. phenylacetic acid thioanilide with a compound of formula II (R4 and R5 are each a lower alkyl; X is a halogen; Y is a counter anion; n is 0 or 1), e.g. 2-chloro-1,3-dimethylimidazolinium chloride. The above reaction is preferably carried out in a reactive solvent (e.g. methylene chloride) in the presence of a base (e.g. triethylamine or the like).

Patent Agency Ranking