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    PROCEDIMIENTO PARA LA OBTENCION DE 2,7-DIMETIL-2,4,6-OCTATRIENAL-MONOACETALES.
    1.
    发明专利
    PROCEDIMIENTO PARA LA OBTENCION DE 2,7-DIMETIL-2,4,6-OCTATRIENAL-MONOACETALES. 未知

    公开(公告)号：ES2227334T3

    公开(公告)日：2005-04-01

    申请号：ES02003429

    申请日：2002-02-14

    Applicant: BASF AG

    Inventor： ERNST HANSGEORG DR ,  HENRICH KLAUS

    IPC: C07D317/14 ,  C07C41/48 ,  C07C43/315 ,  C07C45/38 ,  C07C45/72 ,  C07C47/277 ,  C07C67/31 ,  C07C67/333 ,  C07C67/343 ,  C07C69/73 ,  C07C69/734 ,  C07C69/74 ,  C07D317/18 ,  C07D317/20 ,  C07D317/26 ,  C07D317/30 ,  C07D319/06

    Abstract: Procedimiento para la obtención de 2, 7-dimetil-2, 4, 6-octatrienal-monoacetales de la fórmula **(Fórmula)** en la que los substituyentes R1 a R2, independientemente entre sí, representan alquilo con 1 a 8 átomos de carbono, o pueden formar, junto con los átomos de oxígeno y el átomo de carbono a los que están unidos, un anillo de 1, 3dioxolano o 1, 3-dioxano de las siguientes estructuras **(Fórmula)** en las que R3 y R4, así como R5, respectivamente de modo independiente entre sí, pueden significar hidrógeno o alquilo con 1 a 4 átomos de carbono, caracterizado porque a) se condensa una sal de éster fosfonio de la fórmula general II o un éster fosfonato de la fórmula general III **(Fórmula)** en las que los substituyentes, independientemente entre sí, tienen el siguiente significado: R6 alquilo con 1 a 8 átomos de carbono; R7 arilo; X- en equivalente aniónico de un ácido inorgánico u orgánico; R8 y R9 alquilo con 1 a 8 átomos de carbono; con un aldehído de la fórmula IV **(Fórmula)**en unareacción de Wittig- o Wittig-Horner, para dar un éster de acetal de la fórmula general V **(Fórmula)**.

    2.
    发明专利
    未知

    公开(公告)号：AT289988T

    公开(公告)日：2005-03-15

    申请号：AT01122344

    申请日：2001-09-19

    Applicant: BASF AG

    Inventor： GRIMMER JOHANNES ,  MUELLER THOMAS DR ,  ERNST HANSGEORG DR

    IPC: C07D317/46 ,  A61K31/045 ,  A61K31/12 ,  C07C45/00 ,  C07C45/62 ,  C07C49/743 ,  C07C49/753 ,  C07C403/08 ,  C07D317/00 ,  C07D317/12 ,  C07D317/48 ,  C07F7/18

    Abstract: A process is provided for the preparation of cyclohexene derivatives of general formula I or II:in which the substituents R and R independently of one another are defined as follows:R isR is OH or a protective group convertible to a hydroxyl group by hydrolysis;R and R are hydrogen or C1-C4-alkyl; andR is hydrogen or C1-C4-acyl,by the reduction of alkyne compounds of general formula III or IV:in which the substituents R and X are as defined above, wherein the reducing agent used is a mixture of zinc and at least one compound B selected from the group consisting of ammonium salts, copper salts and alkali metal and alkaline earth metal salts.

    10.
    发明专利
    未知

    公开(公告)号：DE3719622A1

    公开(公告)日：1988-12-29

    申请号：DE3719622

    申请日：1987-06-12

    Applicant: BASF AG

    Inventor： KNAUS GUENTER H DR ,  ERNST HANSGEORG DR ,  THYES MARCO DR ,  PAUST JOACHIM DR

    IPC: C07C69/65 ,  C07C69/653 ,  C07F9/40

    Abstract: Alkyl gamma -halotiglates of the general formula I (I) where X is Cl or Br and R2 is alkyl of 1 to 3 carbon atoms, having a high E isomer content, are prepared by a process in which (a) the corresponding 2-methyl-but-3-enoate of the general formula II (II) is reacted with chlorine or bromine in the absence of a solvent and (b) the resulting 2-methyl-3,4-dihalobutyrate of the general formula III (III) is dehydrohalogenated by reaction with a solution of an alkali metal hydroxide in an alcohol R2OH, where R2 has the stated meaning, or in a mixture of water and an alcohol R2OH, and the products are further processed to give O,O-dialkyl- gamma -phosphonotiglates of the general formula IV (IV) where R1 is alkyl of 1 to 4 carbon atoms and R2 is alkyl of 1 to 3 carbon atoms, preferably ethyl, by reaction with a trialkyl phosphite and thermal isomerization. The process gives C5 building blocks which are extremely interesting for polyene chemistry, the said building blocks being obtained in good yields and essentially in the form of the required E isomers.

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