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    PROCESS AND INTERMEDIATE PRODUCTS FOR PREPARING SUBSTANTIALLY ISOMER-PURE E-2-(2-ARYLOXYMETHYLENE PHENYL)-CROTONIC ACID METHYL ESTERS
    71.
    发明专利
    PROCESS AND INTERMEDIATE PRODUCTS FOR PREPARING SUBSTANTIALLY ISOMER-PURE E-2-(2-ARYLOXYMETHYLENE PHENYL)-CROTONIC ACID METHYL ESTERS 未知

    公开(公告)号：GR3032346T3

    公开(公告)日：2000-04-27

    申请号：GR20000400042

    申请日：2000-01-13

    Applicant: BASF AG

    Inventor： GRAMMENOS WASSILIOS ,  GOETZ NORBERT ,  SAUTER HUBERT ,  OBERDORF KLAUS

    IPC: C07C67/327 ,  C07C67/333 ,  C07C67/343 ,  C07C69/734

    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.

    78.
    发明专利
    未知

    公开(公告)号：BR9711404A

    公开(公告)日：1999-08-17

    申请号：BR9711404

    申请日：1997-09-09

    Applicant: BASF AG

    Inventor： OTTEN MARTINA ,  GOETZ NORBERT ,  DEYN WOLFGANG VON ,  ENGEL STEFAN ,  KARDORFF UWE ,  RACK MICHAEL ,  HILL REGINA LUISE ,  PLATH PETER ,  WESTPHALEN KARL OTTO ,  WALTER HELMUT ,  MISSLITZ ULF

    IPC: A01N43/42 ,  A01N43/56 ,  C07D401/06

    Abstract: Hetaroyl derivatives of the formula Iwhere:R1 and R2 are each hydrogen, nitro, halogen, cyano, thiocyanato, hydroxyl, mercapto, C1-C6-alkyl, C1-C6-alkoxy, C1-C6-alkylthio, C1-C6-alkylsulfinyl, C1-C6-alkylsulfonyl or C1-C6-alkoxysulfonyl, where the last 6 radicals may be substituted and/or functionalized; phenyl, phenoxy, phenylthio, phenylsulfinyl or phenylsulfonyl, where the last 5 radicals may be substituted;Z is an unsubstituted or substituted four-membered unsaturated, partially or fully saturated chain consisting of three carbons and one nitrogen;Q is unsubstituted or substituted hydroxypyrazole linked at position 4;and their agriculturally useful salts.A process for preparing the hetaroyl derivatives, compositions comprising them, and the use of these derivatives or these compositions comprising them for controlling undesirable plants.

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