Patents by Inventor Volker Maywald
Volker Maywald has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6329530Abstract: The invention relates to a method for the production of 1-substituted 5-hydroxypyrazoles of formula (I) wherein R1 is C1-C6-alkyl, C2-C6-alkenyl, C2-C6-alkinyl, C3-C6-cycloalkyl or C1-C4-alkoxy, whereby these groups can be substituted by halogen, C1-C4-alkoxy, phenoxy, C1-C6-alkoxycarbonyl, C1-C6-alkylthiocarbonyl or a cyclic ring system with 3-14 ring atoms, by reacting a) an alkylvinylether of general formula (III) wherein R2 is C1-C6-alkyl or C3-C6-cycloalkyl, with phosgene (IVa), “diphosgene” (IVb) or “triphosgene” (IVc) to form acid chlorides of formula (V), b) transforming said acid chlorides by eliminating hydrogen chloride into the corresponding 3-alkoxyacrylic acid chloride of formula (VI) and c) reacting said acid chloride with hydrazines of formula (VII) wherein R1 has the above cited meaning, to form 5-hydroxypyrazoles of formula (I).Type: GrantFiled: May 3, 2001Date of Patent: December 11, 2001Assignee: BASF AktiengesellschaftInventors: Volker Maywald, Adrian Steinmetz, Michael Rack, Norbert Götz, Roland Götz, Jochem Henkelmann, Heike Becker, Juan Jose Aiscar Bayeto
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Patent number: 6201135Abstract: A process for removing impurities from 3-(2′-acetoxyethyl)-dihydro-2(3H)-furanone (I), which comprises initially preparing the 3-(2′-acetoxyethyl)-dihydro-2(3H)-furanone containing the undesirable impurities in a manner known per se by acetylating 3-(2′-hydroxylethyl)-dihydro-2(3H)-furanone, subsequently treating it with strong mineral acids and finally removing the decomposition products of the undesirable impurities from I.Type: GrantFiled: April 27, 2000Date of Patent: March 13, 2001Assignee: BASF AktiengesellschaftInventors: Volker Maywald, Norbert Götz, Thomas Kükenhöhner, Dirk Borchers, Hartmann König, Horst Hartmann, Rupert Wagner
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Patent number: 6124469Abstract: Sulfur-containing 2-chloro-3-(4,5-dihydro-3-isoxazolyl)-benzoic acids of the formula I in which the substituents have the meanings given in the description are prepared as described.Type: GrantFiled: July 13, 1999Date of Patent: September 26, 2000Assignee: BASF AktiengesellschaftInventors: Joachim Rheinheimer, Wolfgang von Deyn, Joachim Gebhardt, Regina Luise Hill, Michael Rack, Hartmann Konig, Norbert Gotz, Volker Maywald, Uwe Kardorff
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Patent number: 6107254Abstract: 5-(Dioxabicyclohept-6-yl)cyclohexenone oxime ethers of the formula I ##STR1## where: R.sup.1 is hydrogen, the equivalent of an agriculturally useful cation, C.sub.1 -C.sub.10 -alkylcarbonyl, C.sub.1 -C.sub.10 -alkylsulfonyl, C.sub.1 -C.sub.10 -alkylphosphonyl, benzoyl, benzenesulfonyl or benzenephosphonyl;R.sup.2 is C.sub.1 -C.sub.6 -alkyl;R.sup.3 is in each case, independently of the others, hydrogen or C.sub.1 -C.sub.4 -alkyl;Z is a C.sub.1 -C.sub.6 -alkylene, C.sub.3 -C.sub.6 -alkenylene or C.sub.3 -C.sub.6 -alkynylene chain which may carry an exo-methylene substituent (.dbd.CH.sub.2) and/or in each case one to three additional substituents selected from the group consisting of C.sub.1 -C.sub.3 -alkyl substituents and halogen atoms,is a C.sub.3 --C.sub.6 -alkylene or C.sub.4 --C.sub.6 -alkenylene chain which may carry one to three C.sub.1 -C.sub.3 -alkyl substituents and which contains, in addition to methylene or methine units, one of the following bridge members: oxygen, sulfur, --SO--, --SO.sub.Type: GrantFiled: June 23, 1999Date of Patent: August 22, 2000Assignee: BASF AktiengesellschaftInventors: Joachim Rheinheimer, Volker Maywald, Uwe Kardorff, Karl-Otto Westphalen, Ulf Misslitz, Helmut Walter
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Patent number: 5739402Abstract: Preparation of mixtures of O-phenoxyalkylhydroxylamines Ia and Ib ##STR1## and the corresponding salt mixtures by a) converting mixtures of isomers of O-(2-hydroxyethyl)oximes IIa and IIb ##STR2## with a sulfonyl halide III ##STR3## into a mixture of sulfonates IVa and IVb ##STR4## b) reacting this mixture of IVa and IVb with a phenol HO-Ar (V) to give a mixture of O-phenoxyalkoximes VIa and VIb ##STR5## c) hydrolyzing this mixture in the presence of an acid and, if desired d) liberating the O-phenoxyalkylhydroxylamines Ia and Ib from the resulting salts using a mineral acid.Compounds Ia/Ib and VIa/VIb are important intermediates for crop protection agents.Type: GrantFiled: November 4, 1996Date of Patent: April 14, 1998Assignee: BASF AktiengesellschaftInventors: Harald Rang, Norbert Gotz, Albrecht Harreus, Dirk Borchers, Horst Hartmann, Volker Maywald, Frank Heimann, Thomas Buschulte
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Patent number: 5684200Abstract: Hydroxylamine ethers I ##STR1## (where X is NO.sub.2, CN, halogen, alkyl or haloalkyl, Y is H, NO.sub.2, CN, halogen, alkyl or haloalkyl, n is 0-2 or 1-4 where Y and all radicals X are halogen and Alk is unsubstituted or substituted alkylene) and their salts with mineral acids or strong organic acids are prepared by reacting either a hydroximino compound II ##STR2## (where R.sup.1 is alkyl, R.sup.2 is alkyl or alkoxy or R.sup.1 +R.sup.2 form an alkylene chain) in the presence of an alkali metal hydroxide, alkali metal alcoholate, alkali metal bicarbonate or alkali metal carbonate as the base, or the corresponding anion II directly, with an alkylating agent III ##STR3## (where R.sup.3 is unsubstituted or substituted alkyl or unsubstituted or substituted phenyl) to give an oximino derivative IV ##STR4## said derivative is cleaved by means of a mineral acid or a strong organic acid to give the salt of I and, if desired, the latter is converted by means of a base into the free compound I.Type: GrantFiled: June 6, 1995Date of Patent: November 4, 1997Assignee: BASF AktiengesellschaftInventors: Albrecht Harreus, Norbert Goetz, Volker Maywald, Harald Rang, Ulf Misslitz, Ulrich Klein
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Patent number: 5576270Abstract: The invention pertains to isoxazolecarboxamides of the formula I ##STR1## where R.sup.1 is alkyl, cycloalkyl, alkoxyalkyl, alkenyl, alkynyl, phenyl or unsubstituted or substituted benzyl,R.sup.2 is hydrogen or alkyl andR.sup.3 is alkyl, cycloalkyl, alkenyl, alkynyl, phenyl or unsubstituted or substituted benzyl,and the plant-tolerated salts of those compounds in which R.sup.2 is hydrogen, their preparation and their use.Type: GrantFiled: September 29, 1994Date of Patent: November 19, 1996Assignee: BASF AktiengesellschaftInventors: Volker Maywald, Thomas Kuekenhoehner, Peter Muenster, Wolfgang von Deyn, Helmut Walter, Matthias Gerber, Karl-Otto Westphalen, Uwe Kardorff
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Patent number: 5473069Abstract: The preparation of isoxazole-4,5-dicarboxylic diester of the formula I ##STR1## where R.sup.1 is any organic radical which is inert under the reaction conditions, and R.sup.2 and R.sup.3 are each alkyl, cycloalkyl or benzyl, entails reacting an aldoxime of the formula II ##STR2## with a diester of maleic or fumaric acid, of the formula IIIR.sup.2 OOC--C.dbd.C--COOR.sup.3 (III)where R.sup.2 and R.sup.3 are identical or different and have the abovementioned meanings, in the presence of an aqueous solution of a hypohalite which is present in excess relative to II.Type: GrantFiled: March 11, 1991Date of Patent: December 5, 1995Assignee: BASF AktiengesellschaftInventors: Thomas Kuekenhoehner, Volker Maywald
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Patent number: 5399544Abstract: Isoxazole- and isothiazole-5-carboxamides of the formula ##STR1## where X is oxygen or sulfur, R.sup.1 is hydrogen, substituted or unsubstituted alkyl, cycloalkyl, cycloalkenyl, alkenyl (may be epoxidized at the double bond), alkynyl, alkoxy, a heterocyclic radical or phenyl, R.sup.2 is a derivative carboxylic acid function and R.sup.3 and R.sup.4 have the meanings given in the disclosure, and herbicidal agents containing compounds I.Type: GrantFiled: September 14, 1993Date of Patent: March 21, 1995Assignee: BASF AktiengesellschaftInventors: Volker Maywald, Peter Muenster, Hartmann Koenig, Gerhard Hamprecht, Thomas Kuekenhoehner, Wolfgang Rohr, Helmut Walter, Karl-Otto Westphalen, Matthias Gerber
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Patent number: 5378680Abstract: Dicarboximides of the formulae Ia, Ib and Ic ##STR1## where X is oxygen or sulfur,R.sup.1 is hydrogen, halogen, cyano, alkyl, cycloalkyl, alkenyl, alkynyl, alkoxy, alkenyloxy, alkynyloxy, alkylthio, haloalkoxy, haloalkylthio, alkylsulfonyl, haloalkylsulfonyl, phenyl, phenylalkyl, phenoxy or phenylthio, a 5-membered or 6-membered saturated or aromatic heterocyclic radical containing one or two hetero atoms selected from the group consisting of oxygen, sulfur and nitrogen, where the stated organic radicals may be further substituted, andR.sup.2 is hydrogen, hydroxyl, alkoxy, alkyl, cycloalkyl, alkenyl, alkynyl, di-C.sub.1 -C.sub.Type: GrantFiled: August 19, 1992Date of Patent: January 3, 1995Assignee: BASF AktiengesellschaftInventors: Volker Maywald, Klaus Ditrich, Thomas Kuekenhoehner, Gerhard Hamprecht, Wolfgang Freund, Karl-Otto Westphalen, Matthias Gerber, Helmut Walter
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Patent number: 5284821Abstract: Oxazole- and thiazolecarboxamides of the formulae Ia and Ib ##STR1## where the substituents have the following meanings: X oxygen or sulfur;R.sup.1 hydrogen; halogen; substituted or unsubstituted C.sub.1 -C.sub.6 -alkyl, benzyl, cycloalkyl, alkenyl, alkynyl, phenyl, phenoxy or phenylthio; alkoxy; alkylthio; haloalkoxy; haloalkylthio; or a substituted or unsubstituted 5- or 6-membered heterocyclic radical;R.sup.2 formyl, 4,5-dihydrooxazol-2-yl or --COYR.sup.5 ;Y oxygen or sulfur;R.sup.5 hydrogen; cycloalkyl; substituted or unsubstituted alkyl, phenyl, benzyl, alkenyl, cycloalkenyl or alkynyl; a substituted or unsubstituted 5- or 6-membered heterocyclic radical; phthalimido; tetrahydrophthalimido; succinimido; maleiimido; one equivalent of a cation; or--N.dbd.CR.sup.6 R.sup.7 ;R.sup.6, R.sup.7 hydrogen; alkyl; cycloalkyl; phenyl; furyl or together a methylene chain of 4 to 7 members;R.sup.3 hydrogen or substituted or unsubstituted alkyl or cycloalkyl;R.sup.Type: GrantFiled: July 27, 1992Date of Patent: February 8, 1994Assignee: BASF AktiengesellschaftInventors: Klaus Ditrich, Volker Maywald, Gerhard Hamprecht, Albrecht Harreus, Bruno Wuerzer, Karl-Otto Westphalen
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Patent number: 5276160Abstract: Abstract of the Disclosure: 3-Carbamoylisoxazole-4-carboxylic esters of the formula I ##STR1## where R.sup.1 is hydrogen, alkyl, cycloalkyl, phenyl or a 5- to 6-membered heterocyclic radical, it being possible for the organic radicals to carry substituents which are inert under the reaction conditions;R.sup.2 is alkyl, cycloalkyl, benzyl or C.sub.1 -C.sub.3 -alkenyl;R.sup.3 is hydrogen, alkyl or cycloalkyl andR.sup.4 is an aliphatic or cycloaliphatic radical or unsubstituted or substituted phenyl, or R.sup.4 together with R.sup.3 is a 4- to 7-membered alkylene chain which can be interrupted by oxygen, sulfur or N-methyl, are prepared by selective amidation of an isoxazole-3,4-dicarboxylic diester of the formula II ##STR2## where R.sup.2 has the meanings of R.sup.2 and is identical to or different from R.sup.2.Type: GrantFiled: March 23, 1993Date of Patent: January 4, 1994Assignee: BASF AktiengesellschaftInventors: Volker Maywald, Thomas Kuekenhoehner, Gerhard Hamprecht
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Patent number: 5264580Abstract: A process for preparing isoxazole-3,4-dicarboxylic acid derivatives of the formula I ##STR1## where R.sup.1 is hydrogen, alkyl, cycloalkyl or phenyl, or a 5- to 6-membered heterocyclic radical, and the organic radicals can have substituents which are inert under the reaction conditions;R.sup.2 is hydrogen, alkyl, cycloalkyl, benzyl or C.sub.3 -C.sub.6 -alkenyl;A is NR.sup.3 R.sup.4 where R.sup.3 is hydrogen or an aliphatic or cycloaliphatic radical and R.sup.4 is an aliphatic or cycloaliphatic radical or unsubstituted or substituted phenyl, or R.sup.3 forms together with R.sup.4 a 4- to 7-membered alkylene chain which can be interrupted by oxygen, sulfur or N-methyl, or is OR.sup.5 where R.sup.5 is alkyl, cycloalkyl, benzyl or alkenyl;by deprotonation of a CH-acid compound of the formula II ##STR2## using a base and reacting with hydroximyl chlorides of the formula III ##STR3## wherein a magnesium alcoholate of the formula IVMg(OR.sup.6 ).sub.2 IVwhere R.sup.Type: GrantFiled: March 23, 1993Date of Patent: November 23, 1993Assignee: BASF AktiengesellschaftInventors: Volker Maywald, Thomas Kuekenhoehner, Peter Muenster, Stefan Stahl
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Patent number: 5256633Abstract: Oxazole- and thiazolecarboxamides of the formulae Ia and Ib ##STR1## where the substituents have the following meanings: oxygen or sulfur;hydrogen; halogen; substituted or unsubstituted C.sub.1 -C.sub.6 -alkyl, benzyl, cycloalkyl, alkenyl, alkynyl, phenyl, phenoxy or phenylthio; alkoxy; alkylthio; haloalkoxy; haloalkylthio; or a substituted or unsubstituted 5- or 6-membered heterocyclic radical;formyl, 4,5-dihydrooxazol-2-yl or --COYR.sup.5 ;oxygen or sulfur;hydrogen; cycloalkyl; substituted or unsubstituted alkyl, phenyl, benzyl, alkenyl, cycloalkenyl or alkynyl; a substituted or unsubstituted 5- or 6-membered heterocyclic radical; phthalimido; tetrahydrophthalimido; succinimido; maleiimido; one equivalent of a cation; or--N.dbd.CR.sup.6 R.sup.7 ;R.sup.6, R.sup.7 hydrogen; alkyl; cycloalkyl; phenyl; furyl or together a methylene chain or 4 to 7 members;hydrogen or substituted or unsubstituted alkyl or cycloalkyl;R.sup.Type: GrantFiled: April 17, 1992Date of Patent: October 26, 1993Assignee: BASF AktiengesellschaftInventors: Klaus Ditrich, Volker Maywald, Gerhard Hamprecht, Albrecht Harreus, Bruno Wuerzer, Karl-Otto Westphalen
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Patent number: 5244867Abstract: Oxazole- and thiazolecarboxamides of the formulae Ia and Ib ##STR1## where the substituents have the following meanings: X oxygen or sulfur;R.sup.2 formyl, 4,5-dihydrooxazol-2-yl or --COYR.sup.5 ;Y oxygen or sulfur; andR.sup.4 is methyl and herbicidal agents containing compounds of the formulae Ia or Ib as active ingredients.Type: GrantFiled: December 26, 1991Date of Patent: September 14, 1993Assignee: BASF AktiengesellschaftInventors: Klaus Ditrich, Volker Maywald, Gerhard Hamprecht, Albrecht Harreus, Bruno Wuerzer, Karl-Otto Westphalen
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Patent number: 5203907Abstract: Isoxazole- and isothiazole-5-carboxamides of the formula I ##STR1## where X is oxygen or sulfur, R.sup.1 is halogen, alkylthio, haloalkoxy, haloalkylthio, cyano, formyl, alkanoyl, alkoxycarbonyl, alkylaminocarbonyl, di-(C.sub.1 -C.sub.3)-alkylaminocarbonyl, cyclopropylaminocarbonyl, methylsulfonyl, trifluoromethylsulfonyl, unsubstituted or substituted phenoxy or phenylthio; R.sup.2 is formyl, haloformyl, 4,5-dihydro-2-oxazolyl, COOR.sup.5, COSR.sup.5 or CONR.sup.6 R.sup.7, and R.sup.3 to R.sup.7 have the meanings specified in the description, are suitable as herbicides.Type: GrantFiled: March 11, 1992Date of Patent: April 20, 1993Assignee: BASF AktiengesellschaftInventors: Volker Maywald, Peter Muenster, Hartmann Koenig, Gerhard Hamprecht, Thomas Kuekenhoehner, Helmut Walter, Karl-Otto Westphalen, Matthias Gerber
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Patent number: 5201932Abstract: Carboxamides Ia, Ib, Ic and Id ##STR1## (X=O, S; R.sup.1 =H, halogen, substituted or unsubstituted alkyl, substituted or unsubstituted benzyl, alkoxy, alkylthio, haloalkoxy, haloalkylthio, substituted or unsubstituted phenyl, substituted or unsubstituted phenoxy or phenylthio, a substituted or unsubstituted 5- or 6-membered heterocyclic radical containing one or two heteroatoms, cycloalkyl-substituted alkyl, substituted or unsubstituted alkenyl which may be epoxidized, substituted or unsubstituted alkynyl, substituted or unsubstituted cycloalkyl or cycloalkenyl; R.sup.1 '=cycloalkyl-substituted alkyl, substituted or unsubstituted alkenyl which may be epoxidized, substituted or unsubstituted cycloalkenyl; R.sup.2 =CHO, 4,5-dihydrooxazol-2-yl, COYR.sup.5, CONR.sup.6 R.sup.7 ; Y=O, S; R.sup.Type: GrantFiled: May 4, 1992Date of Patent: April 13, 1993Assignee: BASF AktiengesellschaftInventors: Volker Maywald, Wolfgang Freund, Gerhard Hamprecht, Thomas Kuekenhoehner, Peter Plath, Bruno Wuerzer, Karl-Otto Westphalen
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Patent number: 5176739Abstract: Dicarboximides of the formulae Ia, Ib and Ic ##STR1## where X is oxygen or sulfur, R.sup.1 is hydrogen, halogen, cyano, alkyl, cycloalkyl, alkenyl, alkynyl, alkoxy, alkenyloxy, alkynyloxy, alkylthio, haloalkoxy, haloalkylthio, alkylsulfonyl, haloalkylsulfonyl, phenyl, phenylalkyl, phenoxy or phenylthio, a 5-membered or 6-membered saturated or aromatic heterocyclic radical containing one or two hetero atoms selected from the group consisting of oxygen, sulfur and nitrogen, where the stated organic radicals may be further substituted, andR.sup.2 is hydrogen, hydroxyl, alkoxy, alkyl, cycloalkyl, alkenyl, alkynyl, di-C.sub.1 -C.sub.Type: GrantFiled: June 21, 1991Date of Patent: January 5, 1993Assignee: BASF AktiengesellschaftInventors: Volker Maywald, Klaus Ditrich, Thomas Kuekenhoehner, Gerhard Hamprecht, Wolfgang Freund, Karl-Otto Westphalen, Matthias Gerber, Helmut Walter