公开(公告)号：DE50004236D1

公开(公告)日：2003-12-04

申请号：DE50004236

申请日：2000-08-25

Applicant: BASF AG

Inventor： WEGNER DR ,  PAUST DR ,  ERNST DR

IPC: C07C41/28 ,  C07B61/00 ,  C07C41/50 ,  C07C43/15

公开(公告)号：DE50100102D1

公开(公告)日：2003-03-20

申请号：DE50100102

申请日：2001-02-23

Applicant: BASF AG

Inventor： WEGNER DR ,  JOHN DR

IPC: C07F9/54

Abstract: Preparation of triaryl-3,7,11-trimethyldodeca-2,4,6,10-tetraen-1-yl-p hosphonium salts (I) comprises: (1) reacting 3,7,11-trimethyldodeca-1,4,6,10-tetraen-3-ol with triarylphosphane and a hydrohalic, sulfuric, sulfonic, phosphoric or 1-6C alkanoic acid at -20 to 40 [deg] C to give 3,7,11-trimethyldodeca-1,4,6,10-tetraen-3-yl-phosphonium salt (III); and (2) rearranging (III) at 40-100 [deg] C to form the primary salt (I). Preparation of triaryl-3,7,11-trimethyldodeca-2,4,6-10-tetraen-1-yl-p hosphonium salts of formula (I) comprises: (1) reacting 3,7,11-trimethyldodeca-1,4,6,10-tetraen-3-ol with triarylphosphane and a hydrohalic, sulfuric, sulfonic, phosphoric or 1-6C alkanoic acid at -20 to 40 [deg] C to give 3,7,11-trimethyldodeca-1,4,6,10-tetraen-3-yl-phosphonium salt (III); and (2) rearranging (III) at 40-100 [deg] C to form the primary salt (I). [Image] R : aryl; and X : the anion of hydrohalic, sulfuric, sulfonic, phosphoric or 1-6 C alkanoic acid.

公开(公告)号：DE50100896D1

公开(公告)日：2003-12-11

申请号：DE50100896

申请日：2001-08-25

Applicant: BASF AG

Inventor： THERRE DR ,  KAIBEL DR ,  AQUILA DR ,  WEGNER 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：DE59904210D1

公开(公告)日：2003-03-13

申请号：DE59904210

申请日：1999-09-17

Applicant: BASF AG

Inventor： THERRE DR ,  KAIBEL DR ,  AQUILA DR ,  WEGNER 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：DE59903222D1

公开(公告)日：2002-12-05

申请号：DE59903222

申请日：1999-03-26

Applicant: BASF AG

Inventor： BROECKER DR ,  KAIBEL DR ,  AQUILA DR ,  FUCHS HARTWIG ,  WEGNER 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.