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    11.
    发明专利
    未知

    公开(公告)号：DK1024131T3

    公开(公告)日：2003-01-27

    申请号：DK00100474

    申请日：2000-01-11

    Applicant: DEGUSSA

    Inventor： KRILL STEFFEN DR ,  WEIGEL HORST ,  HUTHMACHER KLAUS DR ,  SHI NONGYUAN DR ,  MARKOWZ GEORG DR ,  HAEFNER VOLKER

    IPC: B01J31/02 ,  C07B61/00 ,  C07C67/00 ,  C07C67/52 ,  C07C67/54 ,  C07C69/017 ,  C07C69/16 ,  C07C69/28

    Abstract: In the preparation of 2,3,5-trimethyl-hydroquinone diesters (I) by catalytic acylation of keto-isophorone (II), the acylating agent is a carboxylic anhydride containing a 1-4C alkyl residue, the reaction solution is cooled to -10 to 35 (preferably 0-30) degrees C, the crystallized (I) is filtered off and the filtrate is recycled to the acylation. In the preparation of 2,3,5-trimethyl-hydroquinone diesters (I) by catalytic acylation of keto-isophorone (II), the acylating agent is a carboxylic anhydride containing a 1-4C alkyl residue, the reaction solution is cooled to -10 to 35 (preferably 0-30) degrees C (optionally after distilling off part of the obtained carboxylic acid (III)), the crystallized (I) is filtered off and the filtrate is recycled to the acylation (optionally after distilling off part of (III) and/or discarding part of the filtrate).

    An improved process for the production of 2,3,5-trimethylhydroquinone diester
    12.
    发明专利
    An improved process for the production of 2,3,5-trimethylhydroquinone diester 未知

    公开(公告)号：IN187710B

    公开(公告)日：2002-06-08

    申请号：IN51CA2000

    申请日：2000-02-01

    Applicant: DEGUSSA

    Inventor： KRILL STEFFEN DR ,  HUTHMACHER KLAUS DR

    IPC: B01J31/26 ,  C07B61/00 ,  C07C67/00 ,  C07C67/08 ,  C07C69/017 ,  C07C69/16 ,  C07C39/10

    Abstract: Preparation of 2,3,5-trimethylhydroquinone diester derivatives (I) comprises treatment of 2,6,6-trimethyl-cyclohex-2-en-1,4-dione (ketoisophorone) (II) with an acylating agent in the presence of a catalytic amount of a protic acid (i.e. an ortho-boric acid, a boric acid anhydride, a boric acid triester, a hydroxycarboxylic acid or a di- or tri-carboxylic acid optionally containing hydroxy groups). Preparation of trimethylhydroquinone diester derivatives of formula (I) comprises treatment of 2,6,6-trimethyl-cyclohex-2-en-1,4-dione (ketoisophorone) of formula (II) with an acylating agent in the presence of a catalytic amount of a protic acid (i.e. an ortho-boric acid, a boric acid anhydride, a boric acid triester, a hydroxycarboxylic acid or a di- or tri-carboxylic acid optionally containing hydroxy groups. N.B. R and R1 are not defined in the main claim, but in a dependent claim are defined as: R, R1 = optionally substituted 1-20 (especially 2-4)C aliphatic, alicyclic residue or aryl (especially phenyl).

    15.
    发明专利
    未知

    公开(公告)号：DK1132385T3

    公开(公告)日：2004-02-16

    申请号：DK01710005

    申请日：2001-02-01

    Applicant: DEGUSSA

    Inventor： HUTHMACHER KLAUS DR ,  KRETZ STEPHAN ,  KRILL STEFFEN DR

    IPC: C07D311/72 ,  C07D311/04

    Abstract: Process for the production of alpha-tocopherol acetate in a recycling process by condensation of trimethylhydroquinone diesters and isophytol in the presence of a catalyst system consisting of a zinc halide and of an aqueous protonic acid and optionally of an elemental metal in a polar solvent/water mixture which is extractable or miscible with water and subsequent recycling of the catalyst system.

    16.
    发明专利
    未知

    公开(公告)号：AT237606T

    公开(公告)日：2003-05-15

    申请号：AT00121076

    申请日：2000-09-28

    Applicant: DEGUSSA

    Inventor： KRILL STEFFEN DR ,  KRETZ STEPHAN ,  HUTHMACHER KLAUS DR

    IPC: B01J27/138 ,  B01J38/00 ,  C07B61/00 ,  C07D311/72

    Abstract: Production of alpha -tocopherol acetate in a recirculating process involves condensation of trimethylhydroquinone and isophytol in presence of a catalyst system comprising zinc halide and an aqueous protonic acid and optionally an elemental metal in a polar solvent/water mixture and subsequent acylation of the resultant alpha -tocopherol. Production of alpha -tocopherol acetate (I) in a recirculating process involves condensation of trimethylhydroquinone and isophytol in presence of a catalyst (II) system comprising zinc halide (IIa) and an aqueous protonic acid (IIb) and optionally an elemental metal in a polar solvent/water mixture extractable or miscible with water. The alpha -tocopherol initially obtained is separated from the aqueous catalyst phase and esterified with an acylating agent. The solution of (II) obtained after working up by aqueous extraction is regenerated and the solution containing acetic acid is returned to the reaction. (II) is concentrated and reintroduced into the reaction in liquid form.

    17.
    发明专利
    未知

    公开(公告)号：AT224864T

    公开(公告)日：2002-10-15

    申请号：AT00100474

    申请日：2000-01-11

    Applicant: DEGUSSA

    Inventor： KRILL STEFFEN DR ,  WEIGEL HORST ,  HUTHMACHER KLAUS DR ,  SHI NONGYUAN DR ,  MARKOWZ GEORG DR ,  HAEFNER VOLKER

    IPC: B01J31/02 ,  C07B61/00 ,  C07C67/00 ,  C07C67/52 ,  C07C67/54 ,  C07C69/017 ,  C07C69/16 ,  C07C69/28

    Abstract: In the preparation of 2,3,5-trimethyl-hydroquinone diesters (I) by catalytic acylation of keto-isophorone (II), the acylating agent is a carboxylic anhydride containing a 1-4C alkyl residue, the reaction solution is cooled to -10 to 35 (preferably 0-30) degrees C, the crystallized (I) is filtered off and the filtrate is recycled to the acylation. In the preparation of 2,3,5-trimethyl-hydroquinone diesters (I) by catalytic acylation of keto-isophorone (II), the acylating agent is a carboxylic anhydride containing a 1-4C alkyl residue, the reaction solution is cooled to -10 to 35 (preferably 0-30) degrees C (optionally after distilling off part of the obtained carboxylic acid (III)), the crystallized (I) is filtered off and the filtrate is recycled to the acylation (optionally after distilling off part of (III) and/or discarding part of the filtrate).

    19.
    发明专利
    未知

    公开(公告)号：BR0004788A

    公开(公告)日：2001-05-22

    申请号：BR0004788

    申请日：2000-10-11

    Applicant: DEGUSSA

    Inventor： SHI NONGYUAN DR ,  HUEBNER FRANK DR ,  DRAPAL BERND ,  PETER RAINER ,  KRILL STEFFEN DR ,  HUTHMACHER KLAUS DR ,  WECKBECKER CHRISTOPH DR

    IPC: B01J31/02 ,  C07B61/00 ,  C07C45/51 ,  C07C45/62 ,  C07C45/69 ,  C07C49/04 ,  C07C49/203 ,  C07C45/87

    Abstract: A process for the preparation of unsaturated 4,5-alleneketones comprises reaction of a tertiary propargylalcohol with an alkenylalkylether or a ketal in the presence of an aliphatic sulfonic acid or salt. A process for the preparation of unsaturated 4,5-alleneketones (I) of formula (1) comprises reaction of a tertiary propargylalcohol of formula (2) with an alkenylalkylether of formula (3) or a ketal of formula (4) in the presence of an aliphatic sulfonic acid of formula (5) or sulfonic acid salt of formula (6). An Independent claim is included for a process for the preparation of unsaturated 3,5-dieneketones and their corresponding saturated ketones by isomerization or hydrogenation of 4,5-alleneketones (I) of formula (1). R -O-C(R )=CH-R (3), R SO3H (5), R SO3M (6) R , R = H, 1-20C alkyl, aryl or alkylaryl or R and R may combine to form a 5-6 membered ring; R , R = 1-4C alkyl; R ,R = 1-4C alkyl; R , R = halogen, 1-20C alkyl or cycloalkyl optionally substituted with halogen, R is additionally an optionally substituted aryl; and M = cation of an organic or inorganic base.

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