公开(公告)号：AT253542T

公开(公告)日：2003-11-15

申请号：AT01120387

申请日：2001-08-25

Applicant: BASF AG

Inventor： THERRE JOERG DR ,  KAIBEL GERD DR ,  AQUILA WERNER DR ,  WEGNER GUENTER DR ,  FUCHS HARTWIG

IPC: C07C41/50 ,  C07B61/00 ,  C07C41/56 ,  C07C41/58 ,  C07C43/303

Abstract: Preparation of acetals by reaction of 1 mol. of an unsaturated aldehyde with 1 mol. of an unsaturated alcohol in presence of an acid as catalyst and with separation of the water of reaction is effected by partly reacting the reactants in a column, concentrating the obtained acetal in ≥ 2 sequential evaporation steps and then recycling the recovered reactants to the reaction column. Preparation of acetals (I) by reaction of 1 mol. of an unsaturated aldehyde (II) with 1 mol. of an unsaturated alcohol (III) in presence of an acid as catalyst and with separation of the water of reaction is effected by partly reacting the reactants in a column, concentrating the obtained acetal in ≥ 2 sequential evaporation steps and then recycling the recovered reactants to the reaction column. R - R = H or optionally substituted 1-6C alkyl; and R = H, an optionally mono- or poly-unsaturated, optionally substituted 1-12C alkyl or an optionally substituted 3-12-membered optionally mono- or poly-unsaturated carbon ring.

公开(公告)号：AT232193T

公开(公告)日：2003-02-15

申请号：AT99118458

申请日：1999-09-17

Applicant: BASF AG

Inventor： THERRE JOERG DR ,  KAIBEL GERD DR ,  AQUILA WERNER DR ,  WEGNER GUENTER DR ,  FUCHS HARTWIG

IPC: B01J27/16 ,  C07B61/00 ,  C07C41/28 ,  C07C43/15 ,  C07C45/37 ,  C07C45/51 ,  C07C45/54 ,  C07C45/67 ,  C07C47/21 ,  C07C49/203

Abstract: Preparation of citral (I) comprises thermal decomposition of 3-methyl-2-buten-1-al-diprenylacetal and rearrangement of obtained intermediates cis/trans-prenyl-(methyl-butadienyl)-ether (IV) and 2,4,4-trimethyl-3-formyl-1,5-hexadiene (V). (IV) and (V) are continuously distilled off and converted into (I) before or after removal of by-product prenol. Preparation of 3,7-dimethyl-2,6-octadien-1-al (citral) of formula (I) comprises: (1) thermal decomposition of 3-methyl-2-buten-1-al-diprenylacetal of formula (II) optionally in the presence of an acid catalyst to split off 3-methyl-buten-1-ol (prenol) of formula (III) and form cis/trans-prenyl-(methyl-butadienyl)-ether of formula (IV); (2) Claisen rearrangement of (IV) to give 2,4,4-trimethyl-3-formyl-1,5-hexadiene of formula (V); and (3) Cope rearrangement of (V) to form (I). The transitionally formed (IV) and (V) and the desired citral as well as the prenol (III) are continuously distilled out of the reaction mixture and (IV) and (V), before or after distillative separation of (III) and optional by-products, are subjected to rearrangement to form (I) at 100-200 degrees C.

公开(公告)号：DE4026788A1

公开(公告)日：1992-02-27

申请号：DE4026788

申请日：1990-08-24

Applicant: BASF AG

Inventor： WEGNER GUENTER DR ,  KARBACH STEFAN DR ,  SMUDA HUBERT DR ,  HICKMANN ECKHARD DR ,  KOBER REINER DR ,  SEELE RAINER DR ,  ZIERKE THOMAS DR

IPC: C07C45/68 ,  C07C45/71 ,  C07C49/175 ,  C07C49/255 ,  C07C49/517 ,  C07C49/84 ,  C07D307/46 ,  C07D333/22

Abstract: Process for the production of alpha , alpha -dialkoxyketones of the general formula I in which R and R independently of one another are hydrogen, C1- to C20-alkyl, C3- to C20-cycloalkyl, C4- to C30-cycloalkylalkyl, C9- to C30-alkylcycloalkyl, or optionally C1- to C8-alkyl-, C1- to C8-alkoxy-, halogen-, C1- to C4-haloalkyl-, C1- to C4-haloalkoxy-, phenyl-, phenoxy-, halophenyl-, halophenoxy- and/or cyano-substituted aryl, C7- to C20-aralkyl or heterocycle, R is additionally R and R independently of one another are C1- to C20-alkyl, C3- to C20-cycloalkyl, aryl, C7- to C20-arylalkyl, or together are a C2- to C7-alkylene chain which is optionally substituted by C1- to C4-alkyl, and R is R or together with R is a C2- to C7-alkylene chain which is optionally substituted by C1- to C4-alkyl, by reacting ketones or aldehydes of the general formula II with nitrites of the general formula III R -(NO2)n (III> in which n is 1 or 2, and n is 2 if R and R together represent a C2- to C7-alkylene chain which is optionally substituted by C1- to C4-alkyl, with the proviso that the nitrite groups are terminal, or with a mixture of alcohol of the general formula IV R -(OH)n IV in which n is 1 or 2, and n is 2 if R and R together represent a C2- to C7-alkylene chain which is optionally substituted by C1- to C4-alkyl, with the proviso that the hydroxyl group is terminal, and with dinitrogen trioxide in a molar ratio of 2:1 in the presence of an acid catalyst, at temperatures from 0 to 170 DEG C.

公开(公告)号：DE3928812A1

公开(公告)日：1991-03-07

申请号：DE3928812

申请日：1989-08-31

Applicant: BASF AG

Inventor： KOBER REINER DR ,  SEELE RAINER DR ,  ZIERKE THOMAS DR ,  ISAK HEINZ DR ,  KARBACH STEFAN DR ,  WEGNER GUENTER DR

IPC: C07B49/00 ,  C07F3/02 ,  C07F7/08

Abstract: Preparation of ether solutions of arylmethylmagnesium halides… Ar-CH2-Mg-Hal I… (Aryl = unsubstituted or substituted aryl; Hal = Cl, Br) by the Grignard process from arylmethyl halides II… Ar-CH2-Hal II… with magnesium in an ether as a solvent, by using III… tert-butyl-O-R III… (R = C1-C3-alkyl) for this purpose.

公开(公告)号：DE3832075A1

公开(公告)日：1990-03-22

申请号：DE3832075

申请日：1988-09-21

Applicant: BASF AG

Inventor： SEELE RAINER DR ,  FISCHER KLAUS DR ,  WEGNER GUENTER DR ,  KOEHLER HERMANN DR ,  AMMERMANN EBERHARD DR ,  LORENZ GISELA DR

IPC: A01N55/00 ,  A01N55/10 ,  C07F7/10

Abstract: Substituted imidazolylmethylsilanes of the general formula in which A, B and D denote alkyl, cycloalkyl, naphthyl, biphenyl or phenyl, it being possible for these radicals to be substituted; x, y and z denote hydrogen, halogen, nitro, cyano, haloalkyl, alkoxy, optionally substituted amino, optionally alkyl-substituted mercapto, acyl, alkoxycarbonyl, hydroxycarbonyl, hydroxyalkyl or optionally substituted phenyl, but x, y and z do not simultaneously denote hydrogen, and their phytophysiologically acceptable acid addition salts and metal complexes, and fungicides containing these compounds.

公开(公告)号：SI0992477T1

公开(公告)日：2003-06-30

申请号：SI9930238

申请日：1999-09-17

Applicant: BASF AG

Inventor： THERRE JOERG DR ,  KAIBEL GERD DR ,  AQUILA WERNER DR ,  WEGNER GUENTER DR ,  FUCHS HARTWIG

IPC: C07B61/00 ,  C07C41/28 ,  B01J27/16 ,  C07C43/15 ,  C07C45/37 ,  C07C45/51 ,  C07C45/54 ,  C07C45/67 ,  C07C47/21 ,  C07C49/203

Abstract: Preparation of citral (I) comprises thermal decomposition of 3-methyl-2-buten-1-al-diprenylacetal and rearrangement of obtained intermediates cis/trans-prenyl-(methyl-butadienyl)-ether (IV) and 2,4,4-trimethyl-3-formyl-1,5-hexadiene (V). (IV) and (V) are continuously distilled off and converted into (I) before or after removal of by-product prenol. Preparation of 3,7-dimethyl-2,6-octadien-1-al (citral) of formula (I) comprises: (1) thermal decomposition of 3-methyl-2-buten-1-al-diprenylacetal of formula (II) optionally in the presence of an acid catalyst to split off 3-methyl-buten-1-ol (prenol) of formula (III) and form cis/trans-prenyl-(methyl-butadienyl)-ether of formula (IV); (2) Claisen rearrangement of (IV) to give 2,4,4-trimethyl-3-formyl-1,5-hexadiene of formula (V); and (3) Cope rearrangement of (V) to form (I). The transitionally formed (IV) and (V) and the desired citral as well as the prenol (III) are continuously distilled out of the reaction mixture and (IV) and (V), before or after distillative separation of (III) and optional by-products, are subjected to rearrangement to form (I) at 100-200 degrees C.

公开(公告)号：SI0947493T1

公开(公告)日：2003-04-30

申请号：SI9930177

申请日：1999-03-26

Applicant: BASF AG

Inventor： BROECKER FRANZ JOSEF DR ,  KAIBEL GERD DR ,  AQUILA WERNER DR ,  FUCHS HARTWIG ,  WEGNER GUENTER DR ,  STROEZEL MANFRED

IPC: B01J23/44 ,  B01J8/20 ,  B01J8/22 ,  B01J19/24 ,  B01J23/46 ,  C07B61/00 ,  C07C45/62 ,  C07C47/21 ,  C07C49/04

Abstract: Production of saturated carbonyl compounds (I) by selective liquid-phase hydrogenation of alpha , beta -unsaturated carbonyl compounds (II) is carried out in a packed bubble column with the product recycled and by circulating hydrogen gas. Production of saturated carbonyl compounds of formula R1-CH(R2)-CH(R3)-C(R4)=O (I) by selective liquid-phase hydrogenation of alpha , beta -unsaturated carbonyl compounds of formula R1-C(R2)=C(R3)-C(R4)=O (II) in the presence of a particulate palladium and/or rhodium catalyst and a base is carried out in a packed bubble column with the product recycled and by circulating hydrogen gas. R1 = H or an organic group; R2-R4 = H or 1-4C alkyl.

公开(公告)号：DK0992477T3

公开(公告)日：2003-02-24

申请号：DK99118458

申请日：1999-09-17

Applicant: BASF AG

Inventor： THERRE JOERG DR ,  KAIBEL GERD DR ,  AQUILA WERNER DR ,  WEGNER GUENTER DR ,  FUCHS HARTWIG

IPC: B01J27/16 ,  C07B61/00 ,  C07C41/28 ,  C07C43/15 ,  C07C45/37 ,  C07C45/51 ,  C07C45/54 ,  C07C45/67 ,  C07C47/21 ,  C07C49/203

Abstract: Preparation of citral (I) comprises thermal decomposition of 3-methyl-2-buten-1-al-diprenylacetal and rearrangement of obtained intermediates cis/trans-prenyl-(methyl-butadienyl)-ether (IV) and 2,4,4-trimethyl-3-formyl-1,5-hexadiene (V). (IV) and (V) are continuously distilled off and converted into (I) before or after removal of by-product prenol. Preparation of 3,7-dimethyl-2,6-octadien-1-al (citral) of formula (I) comprises: (1) thermal decomposition of 3-methyl-2-buten-1-al-diprenylacetal of formula (II) optionally in the presence of an acid catalyst to split off 3-methyl-buten-1-ol (prenol) of formula (III) and form cis/trans-prenyl-(methyl-butadienyl)-ether of formula (IV); (2) Claisen rearrangement of (IV) to give 2,4,4-trimethyl-3-formyl-1,5-hexadiene of formula (V); and (3) Cope rearrangement of (V) to form (I). The transitionally formed (IV) and (V) and the desired citral as well as the prenol (III) are continuously distilled out of the reaction mixture and (IV) and (V), before or after distillative separation of (III) and optional by-products, are subjected to rearrangement to form (I) at 100-200 degrees C.