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    METHOD FOR THE PRODUCTION OF CHIRAL IMIDAZOLIDIN-2-ONES
    25.
    发明专利
    METHOD FOR THE PRODUCTION OF CHIRAL IMIDAZOLIDIN-2-ONES 未知

    公开(公告)号：AU2003229621A1

    公开(公告)日：2003-10-20

    申请号：AU2003229621

    申请日：2003-04-08

    Applicant: BASF AG

    Inventor： ERNST HANSGEORG ,  KOPPENHOFER JURGEN ,  KLEIN DANIELA

    IPC: C07D233/34 ,  C07B53/00 ,  C07B61/00 ,  C07D233/00

    Abstract: The invention relates to a process for preparing chiral imidazolidin-2-ones of the formula I in which R 1 is C 1 -C 8 -alkyl, cyclohexyl, phenyl, a C 1 -C 6 -alkyl-, halo-, nitro-, C 1 -C 6 -alkoxy-, C 1 -C 6 -alkylmercapto- or CF 3 -substituted phenyl radical, naphthyl or a C 1 -C 6 -alkyl-, halo-, nitro-, C 1 -C 6 -alkoxy- or CF 3 -substituted naphthyl radical, R 2 is C 1 -C 8 -alkyl, C 2 -C 8 -alkenyl, cyclohexyl, phenyl or a phenyl-C 1 -C 6 -alkyl radical which may be substituted by a nitro, C 1 -C 6 -alkoxy, methylenedioxy or CF 3 radical, and R 3 is C 1 -C 12 -alkyl, C 2 -C 8 -alkenyl, cyclohexyl, phenyl or a C 1 -C 6 -alkyl-, halo-, nitro-, C 1 -C 6 -alkoxy-, methylenedioxy-, dialkylamino- or CF 3 -substituted phenyl radical, by reacting a compound of the formula II or the salt thereof in which R 1 , R 2 and R 3 have the abovementioned meaning, with urea in the presence of an involatile ammonium salt, wherein the reaction is carried out in the presence of an aprotic polar organic solvent.

    30.
    发明专利
    未知

    公开(公告)号：DE50211128D1

    公开(公告)日：2007-12-13

    申请号：DE50211128

    申请日：2002-06-19

    Applicant: BASF AG

    Inventor： KLEIN DANIELA ,  WEGNER CHRISTOPH

    IPC: C07F9/54 ,  C07F9/02

    Abstract: A solution of crude phosphonium salt is passed over a bed of a cation exchange resin in salt form. Subsequently, the cation exchange resin is washed with a solvent, and the phosphonium salt is eluted from the resin with an electrolyte solution, optionally in combination with a polar aprotic solvent. A solution of crude phosphonium salt of formula R-P+R'3X- is passed over a bed of a cation exchange resin in salt form. Subsequently, the cation exchange resin is washed with a solvent and the phosphonium salt is eluted from the resin with an electrolyte solution, optionally in combination with a polar aprotic solvent. The solvent for washing is polar protic or aprotic solvent(s) and/or nonpolar solvent(s). R = 5-40C hydrocarbon radical; R' = 1-4C alkyl or 6-10C aryl; and X = anion equivalent.

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