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    4.
    发明专利
    未知

    公开(公告)号：DE69309373D1

    公开(公告)日：1997-05-07

    申请号：DE69309373

    申请日：1993-08-11

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： NAGATA TERUYUKI ,  KUSUDA CHIYUKI ,  WADA MASARU ,  SATOU KENICHI

    IPC: C07C209/00 ,  C07C209/28 ,  C07C209/52 ,  C07C209/68 ,  C07C213/02

    Abstract: Disclosed are (1) a method for preparing an aromatic secondary amino compound which comprises reacting an N-cyclohexylideneamino compound in the presence of a hydrogen moving catalyst and a hydrogen acceptor by the use of a sulfur-free polar solvent and/or a cocatalyst, and (2) a method for preparing an aromatic secondary amino compound which comprises reacting cyclohexanone or a nucleus-substituted cyclohexanone, an amine and a nitro compound corresponding to the amine in a sulfur-free polar solvent in the presence of a hydrogen moving catalyst, a cocatalyst being added or not added.

    8.
    发明专利
    未知

    公开(公告)号：DE3777236D1

    公开(公告)日：1992-04-16

    申请号：DE3777236

    申请日：1987-05-05

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： KAJIMOTO NOBUYUKI ,  NAGATA TEREUYUKI ,  WADA MASARU ,  TAMAKI AKIHIRO

    IPC: C07D263/22

    Abstract: An improved process for producing a 2-oxazolidinone of the formula wherein R represents hydrogen atom or a lower alkyl group and R1 and R2 are the same as or different and each represent hydrogen atom or a lower alkyl group, by reacting an amino-alcohol of the formula R-NHCHR1CHR2OH wherein R, R1, and R2 are each as defined above, and/or its hydrochloride, with phosgene is provided, which process is characterized by carrying out the reaction substantially in the presence of water and a dehydrochlorinating agent, preferably while keeping the pH of the reaction liquid within a range of 3.0 to 10.0 with the dehydrochlorinating agent in water solvent.

    PROCESS FOR PRODUCING CYCLIC UREAS
    9.
    发明专利
    PROCESS FOR PRODUCING CYCLIC UREAS 未知

    公开(公告)号：CA1286291C

    公开(公告)日：1991-07-16

    申请号：CA538549

    申请日：1987-06-02

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： KAJIMOTO NOBUYUKI ,  NAGATA TERUYUKI ,  WADA MASARU

    IPC: C07D239/36 ,  C07D233/32 ,  C07D239/10 ,  C07D243/04

    Abstract: A process for producing a cyclic diamine which comprises reacting a diamine of the formula R-HN-R'-NH-R (II) wherein R represents a lower alkyl group and R' represents a lower alkyl group-substituted dimethylene group, trimethylene group, a lower alkyl group-substituted trimethylene group, tetramethylene group or a lower alkyl group-substituted tetramethylene group with urea in the presence of a polar solvent and at 180.degree.C or higher, to obtain a cyclic urea (I) wherein R and R' are each as defined above, the production yield being more improved by carrying out the initial period reaction at 140.degree.C or lower.

    10.
    发明专利
    未知

    公开(公告)号：DE3578879D1

    公开(公告)日：1990-08-30

    申请号：DE3578879

    申请日：1985-10-30

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： NAGATA TERUYUKI ,  KAJIMOTO NOBUYUKI ,  WADA MASARU ,  NAKAYAMA HITOSHI ,  YAMADA TADAO

    IPC: C07D233/32

    Abstract: A process for producing 1,3-dimethyl-2-imidazolidinone with a high yield which comprises reacting N,N' -dimethylethylene diamine and/or its hydrochloride with phosgene in the presence of a substantial amount of water and a dehydrochlorinating agent. Particularly, higher yield is attained by carrying out the reaction in water medium while controlling a pH to the range of 3.0 to 10.0 by adding a dehydrochlorinating agent.

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