Brigitte E Segmuller

US Patent:

56167857, Apr 1, 1997

Filed:

Apr 10, 1996

Appl. No.:

8/630145

Inventors:

Jerry D. Unruh - Corpus Christi TX
Brigitte E. Segmuller - Corpus Christi TX
Gabriel R. Chapa - Corpus Christi TX
Kent E. Pryor - Houston TX

Assignee:

Hoechst Celanese Corporation - Somerville NJ

International Classification:

C07F 946
C07F 928

US Classification:

562 25

Abstract:

Hydroformylation of alkenes to aldehydes in the presence of a rhodium complex catalyst is improved by the addition of a novel bidentate ligand of the formula ##STR1## wherein R. sub. 1, R. sub. 2, R. sub. 1. sup. ' are organic radicals selected from alicyclic, aliphatic and aromatic groups of which at least one is preferably substituted with at least one electronegative moiety and the methylene groups are present at the trans-2,3 positions on the norbornane moiety. The invention also provides a novel method for producing the bidentate ligand and novel intermediate phosphine oxide and phosphinous acid compounds.

US Patent:

55678564, Oct 22, 1996

Filed:

May 30, 1995

Appl. No.:

8/453283

Inventors:

Jerry D. Unruh - Corpus Christi TX
Brigitte E. Segmuller - Corpus Christi TX
Gabriel R. Chapa - Corpus Christi TX
Kent E. Pryor - Houston TX

Assignee:

Hoechst Celanese Corporation - Somerville NJ

International Classification:

C07C 4549
C07C 4550

US Classification:

568454

Abstract:

Hydroformylation of alkenes to aldehydes in the presence of a rhodium complex catalyst is improved by the addition of a novel bidentate ligand of the formula ##STR1## wherein R. sub. 1, R. sub. 2, R. sub. 1 ' and R. sub. 2 ' are organic radicals selected from alicyclic, aliphatic and aromatic groups of which at least one is preferably substituted with at least one electronegative moiety and the methylene groups are present at the trans-2,3 positions on the norbornane moiety. The invention also provides a novel method for producing the bidentate ligand and novel intermediate phosphine oxide and phosphinous acid compounds.

US Patent:

57103380, Jan 20, 1998

Filed:

Apr 10, 1996

Appl. No.:

8/630316

Inventors:

Jerry D. Unruh - Corpus Christi TX
Brigitte E. Segmuller - Corpus Christi TX
Gabriel R. Chapa - Corpus Christi TX
Kent E. Pryor - Houston TX

Assignee:

Hoechst Celanese Corporation - Somerville NJ

International Classification:

C07F 952

US Classification:

568 16

Abstract:

Hydroformylation of alkenes to aldehydes in the presence of a rhodium complex catalyst is improved by the addition of a novel bidentate ligand of the formula ##STR1## wherein R. sub. 1, R. sub. 2, R. sub. 1 ' and R. sub. 2 ' are organic radicals selected from alicyclic, aliphatic and aromatic groups of which at least one is preferably substituted with at least one electronegative moiety and the methylene groups are present at the trans-2,3 positions on the norbornane moiety. The invention also provides a novel method for producing the bidentate ligand and novel intermediate phosphine oxide and phosphinous acid compounds.

US Patent:

57736618, Jun 30, 1998

Filed:

Sep 2, 1997

Appl. No.:

8/922162

Inventors:

Jerry D. Unruh - Corpus Christi TX
Brigitte E. Segmuller - Corpus Christi TX
Gabriel R. Chapa - Corpus Christi TX
Kent E. Pryor - Houston TX

Assignee:

Celanese International Corporation - Dallas TX

International Classification:

C07F 952

US Classification:

568 16

Abstract:

Hydroformylation of alkenes to aldehydes in the presence of a rhodium complex catalyst is improved by the addition of a novel bidentate ligand of the formula ##STR1## wherein R. sub. 1, R. sub. 2, R. sub. 1 ' and R. sub. 2 ' are organic radicals selected from alicyclic, aliphatic and aromatic groups of which at least one is preferably substituted with at least one electronegative moiety and the methylene groups are present at the trans-2,3 positions on the norbornane moiety. The invention also provides a novel method for producing the bidentate ligand and novel intermediate phosphine oxide and phosphinous acid compounds.

US Patent:

57103372, Jan 20, 1998

Filed:

Apr 10, 1996

Appl. No.:

8/630146

Inventors:

Jerry D. Unruh - Corpus Christi TX
Brigitte E. Segmuller - Corpus Christi TX
Gabriel R. Chapa - Corpus Christi TX
Kent E. Pryor - Houston TX

Assignee:

Hoechst Celanese Corporation - Somerville NJ

International Classification:

C07F 952

US Classification:

568 16

Abstract:

Hydroformylation of alkenes to aldehydes in the presence of a rhodium complex catalyst is improved by the addition of a novel bidentate ligand of the formula ##STR1## wherein R. sub. 1, R. sub. 2, R. sub. 1 ' and R. sub. 2 ' are organic radicals selected from alicyclic, aliphatic and aromatic groups of which at least one is preferably substituted with at least one electronegative moiety and the methylene groups are present at the trans-2,3 positions on the norbornane moiety. The invention also provides a novel method for producing the bidentate ligand and novel intermediate phosphine oxide and phosphinous acid compounds.

US Patent:

57896240, Aug 4, 1998

Filed:

Apr 10, 1996

Appl. No.:

8/630813

Inventors:

Jerry D. Unruh - Corpus Christi TX
Brigitte E. Segmuller - Corpus Christi TX
Gabriel R. Chapa - Corpus Christi TX
Kent E. Pryor - Houston TX

Assignee:

Hoechst Celanese Corporation - Somerville NJ

International Classification:

C07C 4549

US Classification:

568454

Abstract:

Hydroformylation of alkenes to aldehydes in the presence of a rhodium complex catalyst is improved by the addition of a novel bidentate ligand of the formula ##STR1## wherein R. sub. 1, R. sub. 2, R. sub. 1 ' and R. sub. 2 ' are organic radicals selected from alicyclic, aliphatic and aromatic groups of which at least one is preferably substituted with at least one electronegative moiety and the methylene groups are present at the trans-2,3 positions on the norbomane moiety. The invention also provides a novel method for producing the bidentate ligand and novel intermediate phosphine oxide and phosphinous acid compounds.