PROCEDIMIENTO PARA LA ISOMERIZACION DE ALCOHOLES ALILICOS.

    公开(公告)号:ES2290352T3

    公开(公告)日:2008-02-16

    申请号:ES02792876

    申请日:2002-12-04

    Applicant: BASF AG

    Abstract: Procedimiento para la isomerización de alcoholes alílicos reactantes de la fórmula general (I) para dar alcoholes alílicos como producto de la fórmula general (II) significando R1 hasta R5 hidrógeno o un resto alquilo con 1 a 12 átomos de carbono saturado o una o varias veces insaturado, que, en caso dado, puede estar substituido, caracterizado porque se somete a una transposición al menos a un alcohol alílico reactante o a una mezcla de los mismos, según una forma de trabajo semicontinua, para dar el correspondiente alcohol alílico como producto, dosificándose a un reactor adecuado, que contiene catalizador, al menos un alcohol alílico reactante o una mezcla de los mismos.

    43.
    发明专利
    未知

    公开(公告)号:AT373632T

    公开(公告)日:2007-10-15

    申请号:AT02792876

    申请日:2002-12-04

    Applicant: BASF AG

    Abstract: The present invention relates to a process for isomerizing reactant allyl alcohols to product allyl alcohols in the presence of a catalyst, wherein the reactant allyl alcohol is rearranged to product allyl alcohol in semicontinuous or continuous mode in a catalyst-containing suitable reactor. In particular, the process according to the invention is used to prepare linalool from Geraniol and/or nerol.

    Production of 5-alkoxyoxazoles useful as vitamin B6 intermediates comprises heating an alpha-isocyano alkanoate ester in the presence of a high molecular weight amine

    公开(公告)号:DE10304343A1

    公开(公告)日:2004-08-12

    申请号:DE10304343

    申请日:2003-02-03

    Applicant: BASF AG

    Abstract: Production of 5-alkoxyoxazoles (I) comprises heating an alpha -isocyano alkanoate ester (II) at a temperature above 80 [deg] C in the presence of an tertiary amine with a molecular weight above 185. Production of 5-alkoxyoxazoles of formula (I) comprises heating an alpha -isocyano alkanoate ester of formula (II) at a temperature above 80 [deg] C in the presence of an amine of formula NR5R6R7 with a molecular weight above 185. [Image] R1optionally substituted 1-6C alkyl; R2H or optionally substituted 1-6C alkyl; R5-R7optionally substituted 1-9C alkyl or 5-7C cycloalkyl; or two of R5-R7optionally substituted (un)saturated heterocycle. An independent claim is also included for production of pyridoxine derivatives of formula (IX) by: (1) esterifying an amino acid of formula (III); (2) converting the ester to a N-formyl derivative of formula (V); (3) converting this to (II) and thence to (I) as above; (4) reacting (I) with a protected diol of formula (VI) to form a Diels-Alder adduct of formula (VII); and (5) converting this to (IX) by acid treatment and deprotection. [Image] R3, R4protecting groups.

    48.
    发明专利
    未知

    公开(公告)号:DE50101522D1

    公开(公告)日:2004-03-25

    申请号:DE50101522

    申请日:2001-08-16

    Applicant: BASF AG

    Abstract: Described is a process for the preparation of a particulate tetrahydro-3,5-dimethyl-1,3,5-thiadiazine-2-thione product by combining a first aqueous solution comprising methylammonium N-methyldithiocarbamate with a second aqueous solution comprising formaldehyde, followed by separation and drying of the resulting solid, which comprises combining the first and the second aqueous solutions in such a way that the ratio between the concentrations of dithiocarbamate functions and of formaldehyde is essentially constant in the reaction mixture over time during the duration of the reaction.

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