141.
    发明专利
    未知

    公开(公告)号:DE59603866D1

    公开(公告)日:2000-01-13

    申请号:DE59603866

    申请日:1996-04-23

    Applicant: BASF AG

    Abstract: PCT No. PCT/EP96/01689 Sec. 371 Date Oct. 9, 1997 Sec. 102(e) Date Oct. 9, 1997 PCT Filed Apr. 23, 1996 PCT Pub. No. WO96/34847 PCT Pub. Date Nov. 7, 1996A process for the preparation of essentially isomerically pure methyl E-2-(2-aryloxymethylenephenyl)crotonates of the formula Ia Ia where R is an aromatic radical and R' is a C1-C3-alkyl group, which comprises first converting a suitable methyl 2-(2-aryloxymethylenephenyl)- alpha -ketoacetate with an alkyl metal compound of the formula IIIM-CH2-R'IIIwhere M is a metal ion equivalent into the corresponding methyl 2-(2-aryloxymethylenephenyl)- alpha -hydroxybutyrate of the formula IV, subsequently dehydrating IV in the presence of an acid to give a mixture of methyl E- and Z-2-(2-aryloxymethylenephenyl)crotonates and, subsequently, converting this mixture in the presence of a base in an inert polar solvent into the essentially isomerically pure methyl E-2-(2-aryloxymethylenephenyl)crotonate Ia.

    PROCESS AND INTERMEDIATE PRODUCTS FOR PREPARING SUBSTANTIALLY ISOMER-PURE E-2-(2-ARYLOXYMETHYLENE PHENYL)-CROTONIC ACID METHYL ESTERS

    公开(公告)号:HU216269B

    公开(公告)日:1999-05-28

    申请号:HU9801604

    申请日:1996-04-23

    Applicant: BASF AG

    Abstract: PCT No. PCT/EP96/01689 Sec. 371 Date Oct. 9, 1997 Sec. 102(e) Date Oct. 9, 1997 PCT Filed Apr. 23, 1996 PCT Pub. No. WO96/34847 PCT Pub. Date Nov. 7, 1996A process for the preparation of essentially isomerically pure methyl E-2-(2-aryloxymethylenephenyl)crotonates of the formula Ia Ia where R is an aromatic radical and R' is a C1-C3-alkyl group, which comprises first converting a suitable methyl 2-(2-aryloxymethylenephenyl)- alpha -ketoacetate with an alkyl metal compound of the formula IIIM-CH2-R'IIIwhere M is a metal ion equivalent into the corresponding methyl 2-(2-aryloxymethylenephenyl)- alpha -hydroxybutyrate of the formula IV, subsequently dehydrating IV in the presence of an acid to give a mixture of methyl E- and Z-2-(2-aryloxymethylenephenyl)crotonates and, subsequently, converting this mixture in the presence of a base in an inert polar solvent into the essentially isomerically pure methyl E-2-(2-aryloxymethylenephenyl)crotonate Ia.

    CARBAMATOS DE PIRIDILO, PROCEDIMIENTOS Y PRODUCTOS INTERME- DIOS PARA SU OBTENCION Y EL USO DE LOS MISMOS

    公开(公告)号:CO4770924A1

    公开(公告)日:1999-04-30

    申请号:CO96064306

    申请日:1996-12-06

    Applicant: BASF AG

    Abstract: Carbamatos de piridilo de la fórmula Ien la que el índice y los sustituyentes tienen lossignificados siguientes: R´ hidrógeno, alquilo eventualmente sustituido, alquenilo, alquinilo, cicloalquilo, cicloalquenilo, alquilcarbonilo y alcoxicarbonilo; R" alquilo eventualmente sustituido, alquenilo, alquinilo, cicloalquilo cicloalquenilo, o cuando V significa un grupo amino, adicionalmente hidrógeno; V oxígeno (-O-), azufre (-S-) o un grupo amino, que puede llevar uno de los siguientes radicales: alquilo, alquenilo, alquinilo o cicloalquilo; X ciano, nitro, halógeno, Alquilo eventualmente sustituido, alquenilo, alquinilo, alcoxi, alqueniloxi, alquiloxi, o cuando n ANDgt; 1, un puente eventualmente sustituido unido a dos átomos de carbono vecinos del anillo piridilo, que contiene 3 a 4 miembros del grupo: 3 ó 4 átomos de carbono, 2 hasta 3 átomos de carbono y uno o dos átomos de nitrógeno, de oxígeno y/o de azufre, pudiendo este puente formar junto con el anillo al que está ligado, un radical parcialmente insaturado o aromático; n 0, 1, 2 o 3, pudiendo los radicales Y ser diferentes cuando n ANDgt; 1; R halógeno, hidroxi, mercapto, amino, formilo, carboxilo, carbonilamino o un radical orgánico que está ligado directamente o por vía de un grupo oxi, mercapto, amino carboxilo o carbonilamino, o forman junto con un grupo X y el anillo piridilo al que están ligados, un sistema bicíclico parcial o totalmente insaturado, eventualmente sustituido, que además de miembros anulares de carbono puede contener heteroátomos del grupo oxígeno, azufre y nitrógeno.

    Process and intermediate products for preparing substantially isomer-pure E-2-(2-aryloxymethylene phenyl)-crotonic acid methyl esters

    公开(公告)号:AU704131B2

    公开(公告)日:1999-04-15

    申请号:AU5691896

    申请日:1996-04-23

    Applicant: BASF AG

    Abstract: PCT No. PCT/EP96/01689 Sec. 371 Date Oct. 9, 1997 Sec. 102(e) Date Oct. 9, 1997 PCT Filed Apr. 23, 1996 PCT Pub. No. WO96/34847 PCT Pub. Date Nov. 7, 1996A process for the preparation of essentially isomerically pure methyl E-2-(2-aryloxymethylenephenyl)crotonates of the formula Ia Ia where R is an aromatic radical and R' is a C1-C3-alkyl group, which comprises first converting a suitable methyl 2-(2-aryloxymethylenephenyl)- alpha -ketoacetate with an alkyl metal compound of the formula IIIM-CH2-R'IIIwhere M is a metal ion equivalent into the corresponding methyl 2-(2-aryloxymethylenephenyl)- alpha -hydroxybutyrate of the formula IV, subsequently dehydrating IV in the presence of an acid to give a mixture of methyl E- and Z-2-(2-aryloxymethylenephenyl)crotonates and, subsequently, converting this mixture in the presence of a base in an inert polar solvent into the essentially isomerically pure methyl E-2-(2-aryloxymethylenephenyl)crotonate Ia.

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