公开(公告)号：DK433987A

公开(公告)日：1988-02-24

申请号：DK433987

申请日：1987-08-20

Applicant: DEGUSSA

Inventor： ANDRADE JUAN ,  KOEHLER KLAUS ,  PRESCHER GUENTER

IPC: C07B61/00 ,  B01J31/00 ,  C07C51/00 ,  C07C51/235 ,  C07C51/373 ,  C07C55/21 ,  C07C59/147 ,  C07C67/00

公开(公告)号：CA1265533A

公开(公告)日：1990-02-06

申请号：CA473284

申请日：1985-01-31

Applicant: DEGUSSA

Inventor： ANDRADE JUAN ,  PRESCHER GUENTER ,  SAMSON MARC

IPC: C07C45/42 ,  B01J31/00 ,  B01J31/24 ,  C07B61/00 ,  C07C41/56 ,  C07C45/00 ,  C07C45/49 ,  C07C45/50 ,  C07C45/51 ,  C07C47/12 ,  C07C47/198 ,  C07C67/00

Abstract: Acrolein is used as the starting product for 1,4-bu-tanedial (succindialdehyde). The acrolein is converted with an alkanol into a 3,3-dialkoxy-1-propene, which is hydroformylated in the presence of hydridotris-triphenyl-phosphine rhodium carbonyl and triphenyl phosphine or triphenyl phosphite as the catalyst. The 2,4-dialkoxy butanal thus formed is separated from the hydroformylation product by distillation and hydrolyzed to the 1,4-butanedial.

公开(公告)号：BR8500421A

公开(公告)日：1985-09-10

申请号：BR8500421

申请日：1985-01-30

Applicant: DEGUSSA

Inventor： ANDRADE JUAN ,  ARNTZ DIETRICH ,  KRAFT MICHAEL ,  PRESCHER GUENTER

IPC: C07C41/50 ,  B01J21/00 ,  B01J29/00 ,  B01J31/00 ,  C07B61/00 ,  C07C41/00 ,  C07C41/56 ,  C07C41/58 ,  C07C43/303 ,  C07C67/00

Abstract: A method of preparation for acetals utilizing saturated or unsaturated aldehydes, in particular, the preparation of dimethylacetals of acetaldehyde, acrolein and methacrolein. The production of the acetal takes place in a liquid phase in the presence of a solid acid catalyst, such as a strongly acidic ion exchange resin or zeolite. The conversion mixture is extracted by means of water and by means of water insoluble organic solvents. There is obtained not only the desired acetals, but in addition also the unconverted initial quantities of the starting materials by a simple method and with very good yields.

公开(公告)号：BR8500420A

公开(公告)日：1985-09-10

申请号：BR8500420

申请日：1985-01-30

Applicant: DEGUSSA

Inventor： ANDRADE JUAN ,  PRESCHER GUENTER ,  SAMSON MARC

IPC: C07C45/42 ,  B01J31/00 ,  B01J31/24 ,  C07B61/00 ,  C07C41/56 ,  C07C45/00 ,  C07C45/49 ,  C07C45/50 ,  C07C45/51 ,  C07C47/12 ,  C07C47/198 ,  C07C67/00

Abstract: The preparation of 1,4-butandial (succindialdehyde) is obtained using acrolein. The acrolein is first converted with an alkanol into 3,3-dialkoxy-1-propene and this is then hydroformylated in the presence of hydridotristriphenylphosphine-rhodiumcarbonyl mixed with triphenylphosphine or triphenylphosphite as the catalyst. The thereby obtained 4,4-dialkoxy-butanal is removed from the hydroformylation product by means of distillation and is then hydrolyzed to 1,4-butandial.

公开(公告)号：CA1236487A

公开(公告)日：1988-05-10

申请号：CA473216

申请日：1985-01-30

Applicant: DEGUSSA

Inventor： ANDRADE JUAN ,  ARNTZ DIETRICH ,  KRAFT MICHAEL ,  PRESCHER GUENTER

IPC: C07C41/50 ,  B01J21/00 ,  B01J29/00 ,  B01J31/00 ,  C07B61/00 ,  C07C41/00 ,  C07C41/56 ,  C07C41/58 ,  C07C43/303 ,  C07C67/00

Abstract: The present process is intended for producing the acetals of saturated or unsaturated aldehydes particularly for producing the dimethyl acetals of acrolein and methacrolein. The acetals are formed in the liquid phase in the presence of solid acid catalysts such as strongly acid ion exchange resins or zeollites. The reaction mixtures are extracted by means of water and by means of organic solvents which are,not miscible with water. The acetals formed are recovered in a simple manner and in very good yields and so are the non-reaeted components of the starting substances .

公开(公告)号：DK433987D0

公开(公告)日：1987-08-20

申请号：DK433987

申请日：1987-08-20

Applicant: DEGUSSA

Inventor： ANDRADE JUAN ,  KOEHLER KLAUS ,  PRESCHER GUENTER

IPC: C07B61/00 ,  B01J31/00 ,  C07C51/00 ,  C07C51/235 ,  C07C51/373 ,  C07C55/21 ,  C07C59/147 ,  C07C67/00

公开(公告)号：BR8506311A

公开(公告)日：1986-08-26

申请号：BR8506311

申请日：1985-12-16

Applicant: DEGUSSA

Inventor： ANDRADE JUAN ,  PRESCHER GUNTER ,  NAGEL ULRICH

IPC: B01J31/18 ,  C07D207/12 ,  C07D207/40 ,  C07D207/416 ,  C07F9/572 ,  C07F9/65

Abstract: Optically active 1-benzyl-3,4-bis-(diphenylphosphino)-pyrrolidine is produced in a three-step process from optically active 1-benzyl-2,5-dioxo-3,4-dihydroxy-pyrrolidine. The product is useful as a chiral ligand in rhodium complexes which serve as catalysts for the homogeneous asymmetric hydrogenation of prochiral substrates.

公开(公告)号：CA1260497A

公开(公告)日：1989-09-26

申请号：CA502099

申请日：1986-02-18

Applicant: DEGUSSA

Inventor： ANDRADE JUAN ,  PRESCHER GUNTER ,  SAMSON MARC

IPC: C07C47/12 ,  B01J31/00 ,  B01J31/24 ,  C07B61/00 ,  C07C45/00 ,  C07C45/42 ,  C07C45/49 ,  C07C45/50 ,  C07C45/51 ,  C07C67/00

Abstract: The present invention relates to a process for producing 2-alkyl-1,4-butanedial by hydroformylation of acetals of a 2-alkyl-substituted l-propenal in the presence of a complex rhodium catalyst. The 3-alkyl-4,4-dialkoxy butanol thus obtained is separated and hydrolyzed to the desired compound.

公开(公告)号：ES2008075B3

公开(公告)日：1989-07-16

申请号：ES86114053

申请日：1986-10-10

Applicant: DEGUSSA

Inventor： ANDRADE JUAN ,  PRESCHER GUNTER

IPC: C07D307/20

Abstract: LA INVENCION SE REFIERE A UN PROCEDIMIENTO PARA LA PREPARACION DE 2,5-DIMETOXI O DE 2,5DIETOXITETRAHIDROFURANO, POR TRATAMIENTO DE 4,4-DIMETOXIO 4,4-DIETOXI-1-BUTANAL A UNA TEMPERATURA COMPRENDIDA ENTRE 0 Y 70 C, CON UNA RESINA DE INTERCAMBIO DE IONES FUERTEMENTE ACIDA.

公开(公告)号：BR8600633A

公开(公告)日：1986-10-29

申请号：BR8600633

申请日：1986-02-14

Applicant: DEGUSSA

Inventor： ANDRADE JUAN ,  PRESCHER GUNTER ,  SAMSON MARC

IPC: C07C47/12 ,  B01J31/00 ,  B01J31/24 ,  C07B61/00 ,  C07C45/00 ,  C07C45/42 ,  C07C45/49 ,  C07C45/50 ,  C07C45/51 ,  C07C67/00 ,  C07C47/20