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    53.
    发明专利
    未知

    公开(公告)号：AT208363T

    公开(公告)日：2001-11-15

    申请号：AT98116052

    申请日：1998-08-26

    Applicant: BASF AG

    Inventor： TELES JOAQUIM HENRIQUE DR ,  RIEBER NORBERT DR ,  BREUER KLAUS DR ,  DEMUTH DIRK DR ,  HIBST HARTMUT PROF DR ,  KAESHAMMER STEFAN DR ,  ETZRODT HEINZ DR ,  KAISER WULF DR

    IPC: B01J23/06 ,  C07B61/00 ,  C07C41/08 ,  C07C41/28 ,  C07C45/51 ,  C07C49/203

    Abstract: Unsaturated ketones, comprising optionally substituted but-3-enyl and/or buta-2.3-dienyl methyl ketones, are prepared by: (a) reacting allyl alcohols and/or propargyl alcohols with isopropenyl ethers, with formation of ketals as by-product; (b) preparing isopropenyl ethers by catalytic gas phase reaction of ketals with propyne and/or allene; and (c) feeding the ketal from stage (a) into stage (b). The but-3-enyl methyl ketones of formula (Ia) and but-2,3-dienyl methyl ketones of formula (Ib) formed, allyl alcohols of formula (IIa) and/or propargyl alcohols of formula (IIb) and isopropenyl ethers (III) used as starting materials are ketals (IV). R1, R2, R3, R4, R5 = H or (cyclo)alkyl, (cyclo)alkenyl or ar(alk)yl (optionally containing O); or R1R2 = 5-6-membered ring; and R6 = 1-4C alkyl. (III) are prepared by the gas phase reaction of (IV) and propyne or allene at elevated temperature in the presence of a heterogeneous catalyst containing Zn or Cd plus Si and O.

    56.
    发明专利
    未知

    公开(公告)号：DE59400305D1

    公开(公告)日：1996-07-04

    申请号：DE59400305

    申请日：1994-03-04

    Applicant: BASF AG

    Inventor： RITTINGER STEFAN DR ,  RIEBER NORBERT DR

    IPC: C07D239/26 ,  C07D239/36 ,  C07D239/40 ,  C07D239/42 ,  C07D295/104

    Abstract: Process for the preparation of 4-methylpyrimidines of the general formula I in which R is C1- to C20-alkyl, C3- to C8-cycloalkyl, aryl, C7- to C12-phenalkyl, C7- to C12-alkylphenyl, NH2, NHCN, OH or SH, by reacting 1-aminovinyl methyl ketones of the general formula II in which R and R are C1- to C20-alkyl, C3- to C8-cycloalkyl, aryl, C 7- to C12-phenylalkyl, C7- to C12-alkylphenyl, C1- to C20-hydroxyalkyl, or together are a C2- to C7-alkylene chain which is optionally monosubstituted to tetrasubstituted by C1- to C4-alkyl and optionally interrupted by oxygen, nitrogen or sulphur, with carboxamides or amidines of the general formula III in which R has the abovementioned meanings and X represents oxygen or NH, at temperatures from 20 to 200@C and pressures from 0.01 to 50 bar.

    57.
    发明专利
    未知

    公开(公告)号：DE4446194A1

    公开(公告)日：1996-06-27

    申请号：DE4446194

    申请日：1994-12-23

    Applicant: BASF AG

    Inventor： RITTINGER STEFAN DR ,  RIEBER NORBERT DR ,  GOLD RANDALL EVAN DR ,  DRESSEL JUERGEN DR

    IPC: C05G3/90 ,  C07D231/12 ,  C07D231/16 ,  C07D521/00 ,  C08J3/24 ,  C05G3/08

    Abstract: Disclosed is the use as nitrification inhibitors of pyrazole derivatives of formula (I), or salts thereof, in which the groups R -R have the following meanings: R , R and R represent C1-C20 alkyl, C3-C8 cycloalkyl, C5-C20 aryl or alkyl aryl (these four groups can be singly or doubly substituted by a halogen and/or hydroxyl), and halogen, nitro or hydrogen; and R represents either (a) C6-C20 alkyl, one or two hydrogen atoms being optionally substituted by a halogen; or (b) C1-C20 alkyl. In the latter case, 1-4 hydrogen atoms can be substituted by a group of formula (II), in which R , R , and R represent C1-C20 alkyl, C3-C8 cycloalkyl, C5-C20 aryl or alkyl aryl (these four groups can be singly or doubly substituted by a halogen and/or hydroxyl), as well as halogen, nitro or hydrogen; and 1 or two hydrogen atoms are optionally substituted by a halogen.

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