Method for preparing a pyripyropene compound

    公开(公告)号:AU2014206958A1

    公开(公告)日:2015-08-06

    申请号:AU2014206958

    申请日:2014-01-15

    Applicant: BASF SE

    Abstract: The present invention relates to a method for preparing the pyripyropene compound of the formula (I) which method comprises the following steps: i) subjecting a pyripyropene compound of formula Pyripyropene A to an alkaline hydrolysis to yield a 1,7,11-trideacetylpyripyropene A, ii) reacting 1,7,11-trideacetylpyripyropene A obtained in step i) with cyclopropane carbonyl chloride to yield a raw product containing the pyripyropene compound of formula (I); iii) subjecting the raw product of step ii) to crystallization to yield a crystalline pyripyropene compound of formula (I) and a mother liquor;and iv) recycling the mother liquor or a pyripyropene compound containing fraction thereof to the alkaline hydrolysis of step i).

    METHOD FOR PREPARING A PYRIPYROPENE COMPOUND

    公开(公告)号:CA2898115A1

    公开(公告)日:2014-07-24

    申请号:CA2898115

    申请日:2014-01-15

    Applicant: BASF SE

    Abstract: The present invention relates to a method for preparing the pyripyropene compound of the formula (I) which method comprises the following steps: i) subjecting a pyripyropene compound of formula Pyripyropene A to an alkaline hydrolysis to yield a 1,7,11-trideacetylpyripyropene A, ii) reacting 1,7,11-trideacetylpyripyropene A obtained in step i) with cyclopropane carbonyl chloride to yield a raw product containing the pyripyropene compound of formula (I); iii) subjecting the raw product of step ii) to crystallization to yield a crystalline pyripyropene compound of formula (I) and a mother liquor;and iv) recycling the mother liquor or a pyripyropene compound containing fraction thereof to the alkaline hydrolysis of step i).

    PROCEDIMIENTO PARA LA OBTENCION DE NITRITOS DE ALQUILO Y DE NITRITOS DE ALQUILO.

    公开(公告)号:ES2307816T3

    公开(公告)日:2008-12-01

    申请号:ES02794543

    申请日:2002-08-02

    Applicant: BASF SE

    Abstract: Procedimiento para la obtención en continuo de nitritos de alquilo o de dinitritos de alquilo mediante la reacción de un alcanol o de un dialcanol con un nitrito inorgánico en presencia de, al menos, un ácido mineral que no tenga acción oxidante sobre el nitrito, caracterizado porque (i) se mezcla el alcanol o el dialcanol con una solución acuosa del ácido mineral, empleándose, en promedio, una cantidad no mayor que 1,01 moles de equivalentes de ácido por cada mol de grupos hidroxilo del alcanol o del dialcanol, (ii) se aporta en continuo, en una zona de reacción, a la mezcla acuosa, obtenida en (i), una solución acuosa del nitrito inorgánico, y (iii) en caso dado se aísla la fase orgánica.

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