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1

Aluminum Triflate as a Highly Active and Efficient Nonprotic Cocatalyst in the Palladium-Catalyzed Methoxycarbonylation Reaction

D. Bradley G. Williams, Megan L. Shaw, Michael J. Green, Cedric W. Holzapfel

Journal:

Angewandte Chemie International Edition

Year:

2008

Language:

english

File:

PDF, 319 KB

english, 2008

2

Aluminum Triflate as a Highly Active and Efficient Nonprotic Cocatalyst in the Palladium-Catalyzed Methoxycarbonylation Reaction

D. Bradley G. Williams, Megan L. Shaw, Michael J. Green, Cedric W. Holzapfel

Journal:

Angewandte Chemie

Year:

2008

Language:

english

File:

PDF, 319 KB

english, 2008

3

Observations on Dibutylstannylene as Template for the Assembly of Macrocyclic Oligolactones

Martin W. Bredenkamp, Harold M. Flowers, Cedric W. Holzapfel

Journal:

European Journal of Inorganic Chemistry

Year:

1992

Language:

english

File:

PDF, 863 KB

english, 1992

4

ChemInform Abstract: Palladium-Catalyzed Cyclization of Chiral Carbohydrate-Derived Geminal Diacetates.

Cedric W. Holzapfel, Lizel Marais, Francois Toerien

Journal:

Year:

1999

File:

PDF, 33 KB

1999

5

ChemInform Abstract: Stereoselective Thallium-Induced Ring Contraction of Glycals.

Dana H. Braithwaite, Cedric W. Holzapfel, Bradley G. Williams

Journal:

Year:

1999

File:

PDF, 30 KB

1999

6

ChemInform Abstract: Palladium(II)-Catalyzed Intramolecular Oxypalladation/Functionalization of Carbohydrate-Derived Cyclic Alkenes. Regioselective Formation of Substituted Di- and Tetrahydropyrans.

Cedric W. Holzapfel, Lizel Marais

Journal:

Year:

1999

File:

PDF, 30 KB

1999

7

ChemInform Abstract: A New Method for the Conversion of Hexose Derivatives into Substituted Pyrrolidines.

Cedric W. Holzapfel, Renier Crous, Hendrik F. Greyling, Gerhard H. Verdoorn

Journal:

Year:

2000

File:

PDF, 29 KB

2000

8

ChemInform Abstract: Samarium(II) Iodide Promoted Fragmentation and Sequential Reactions of Aromatic 1,4-Diketones.

D. Bradley G. Williams, Kevin Blann, Cedric W. Holzapfel

Journal:

Year:

2000

File:

PDF, 31 KB

2000

9

ChemInform Abstract: Observations on the Samarium Diiodide-Promoted C—C Fragmentation/Ring Expansion Chemistry of Some Aliphatic 1,4-Diketones.

D. Bradley G. Williams, Kevin Blann, Cedric W. Holzapfel

Journal:

Year:

2001

Language:

english

File:

PDF, 37 KB

english, 2001

10

ChemInform Abstract: Aryl γ-Ketoesters as Precursors for γ-Butyrolactones in Samarium(II) Iodide Mediated Reactions.

D. Bradley G. Williams, Kevin Blann, Cedric W. Holzapfel

Journal:

Year:

2001

File:

PDF, 31 KB

2001

11

ChemInform Abstract: A Comparative Study of Some Pd-Catalyzed Heck Reactions in Polar and Aqueous Biphasic Media.

D. Bradley G. Williams, Henriette Lombard, Cedric W. Holzapfel

Journal:

Year:

2001

File:

PDF, 29 KB

2001

12

ChemInform Abstract: Application of Aminocarbonylation in the Synthesis of a Lavendamycin Synthon.

Cedric W. Holzapfel, Wilhelmina Marais

Journal:

Year:

2002

File:

PDF, 26 KB

2002

13

ChemInform Abstract: Furanoterpenoids from Siphonochilus aethiopicus

Cedric W. Holzapfel, Wilhelmina Marais, Philippus L. Wessels, Ben-Erik Van Wyk

Journal:

Year:

2002

File:

PDF, 24 KB

2002

14

A Facile Preparation of Pyridine- and Quinolinecarboxaldehydes by Palladium Catalyzed Carbonylation.

Cedric W. Holzapfel, Alta C. Ferreira, Wilhelmina Marais

Journal:

Year:

2002

File:

PDF, 28 KB

2002

15

Aryl γ-Ketoesters as Precursors for γ-Butyrolactone Dimers in Samarium(II) Iodine-Mediated Reactions.

D. Bradley G. Williams, Kevin Blann, Judy Caddy, Cedric W. Holzapfel

Journal:

Year:

2003

File:

PDF, 104 KB

2003

16

Preparation of an Analogue (I) of Orbicuside A (II), an Unusual Cardiac Glycoside.

John T. Dixon, Fanie R. van Heerden, Cedric W. Holzapfel

Journal:

Year:

2005

File:

PDF, 14 KB

2005

17

The synthesis and analysis of the conformation in solution of the dolastatin 3 diastereomer cyclo[-L-Pro-L-Leu-D-(Gln)Thz-(Gly)Thz-L-Val-]

Martin W. Bredenkamp, Cedric W. Holzapfel, Wynand J. van Zyl

Journal:

European Journal of Organic Chemistry

Year:

1990

Language:

english

File:

PDF, 525 KB

english, 1990

18

Solution-phase secondary-ion mass spectrometry of protonated amino acids

George R. Pettit, Gordon M. Cragg, Cedric W. Holzapfel, Albert A. Tuinman, Donald P. Gieschen

Journal:

Analytical Biochemistry

Year:

1987

Language:

english

File:

PDF, 371 KB

english, 1987

19

Characterization of a γ-radiation-induced antifungal stress metabolite in citrus peel

Ian A. Dubery, Cedric W. Holzapfel, Gert J. Kruger, Johan C. Schabort, Martie van Dyk

Journal:

Year:

1988

Language:

english

File:

PDF, 357 KB

english, 1988

20

Cyclopiamide, an isoindolo[4,6-cd]indole from Penicillium cyclopium

Cedric W. Holzapfel, Martin W. Bredenkamp, Renske M. Snyman, Jan C.A. Boeyens, Christine C. Allen

Journal:

Year:

1990

Language:

english

File:

PDF, 378 KB

english, 1990

21

Plicataloside, an O,O-diglycosylated naphthalene derivative from Aloe plicatilis

Philippus L. Wessels, Cedric W. Holzapfel, Ben-Erik Van Wyk, Wilhelmina Marais

Journal:

Year:

1996

Language:

english

File:

PDF, 283 KB

english, 1996

22

Stereoselective SmI2-mediated conversion of carbohydrates into cyclopentanols

J.J. CronjéGrové, Cedric W. Holzapfel, D.Bradley G. Williams

Journal:

Tetrahedron Letters

Year:

1996

Language:

english

File:

PDF, 160 KB

english, 1996

23

Palladium-catalysed [3 + 2]-cycloaddition reactions employing sulphonyl-activated unsaturated carbohydrate derivatives

Cedric W. Holzapfel, Thilo L. van der Merwe

Journal:

Tetrahedron Letters

Year:

1996

Language:

english

File:

PDF, 175 KB

english, 1996

24

Nitro-activated double bonds in Pd(0)-catalysed [3 + 2]-cycloaddition reactions

Cedric W. Holzapfel, Thilo L. van der Merwe

Journal:

Tetrahedron Letters

Year:

1996

Language:

english

File:

PDF, 151 KB

english, 1996

25

One-pot SmI2-promoted transformation of carbohydrate derivatives into cyclopentanols

J.J. CronjéGrové, Cedric W. Holzapfel, D.Bradley G. Williams

Journal:

Tetrahedron Letters

Year:

1996

Language:

english

File:

PDF, 143 KB

english, 1996

26

Synthesis and crystal structures of new palladium catalysts for the hydromethoxycarbonylation of alkenes

Bernard Omondi, Megan L. Shaw, Cedric W. Holzapfel

Journal:

Journal of Organometallic Chemistry

Year:

2011

Language:

english

File:

PDF, 534 KB

english, 2011

27

Preparation of an analogue of orbicuside A, an unusual cardiac glycoside

John T. Dixon, Fanie R. van Heerden, Cedric W. Holzapfel

Journal:

Tetrahedron: Asymmetry

Year:

2005

Language:

english

File:

PDF, 375 KB

english, 2005

28

Regioselective oxidation of carbohydrate triols: facile synthesis of 2,3-O-isopropylidene-β-d-threo-hexo-2,4-diulo-pyranose and 1,2-O-isopropylidene-β-d-threo-hexo-2,5,diulo-pyranose

Laetitia den Drijver, Cedric W. Holzapfel, Johannes M. Koekemoer, Gert J. Kruger, Martha S. van Dyk

Journal:

Carbohydrate Research

Year:

1986

Language:

english

File:

PDF, 719 KB

english, 1986

29

Furanoterpenoids from Siphonochilus aethiopicus

Cedric W. Holzapfel, Wilhelmina Marais, Philippus L. Wessels, Ben-Erik Van Wyk

Journal:

Year:

2002

Language:

english

File:

PDF, 85 KB

english, 2002

30

Chromone and aloin derivatives from Aloe broomii, A. Africana and A. speciosa

Cedric W. Holzapfel, Philippus L. Wessels, Ben-Erik Van Wyk, Wilhelmina Marais, Madrie Portwig

Journal:

Year:

1997

Language:

english

File:

PDF, 416 KB

english, 1997

31

The synthesis and conformation in solution of cyclo[L-pro-L-leu-(gln)thz-(gly)thz-L-val] (dolastatin 3)

Cedric W. Holzapfel, Wynand J. van Zyl, Marita Roos

Journal:

Year:

1990

Language:

english

File:

PDF, 788 KB

english, 1990

32

Palladium-catalysed cyclisation of chiral carbohydrate-derived geminal diacetates

Cedric W. Holzapfel, Lizel Marais, Francois Toerien

Journal:

Year:

1999

Language:

english

File:

PDF, 679 KB

english, 1999

33

Direct transformation of steroidal ethers into ketones by dimethyldioxirane

Fanie R. van Heerden, John T. Dixon, Cedric W. Holzapfel

Journal:

Tetrahedron Letters

Year:

1992

Language:

english

File:

PDF, 238 KB

english, 1992

34

Samarium (II) iodide mediated transformations of carbohydrate derived iodo oxime ethers into stereodefined alkoxy aminocyclopentanes

J.J. Cronjé, Cedric W. Holzapfel

Journal:

Tetrahedron Letters

Year:

1997

Language:

english

File:

PDF, 167 KB

english, 1997

35

Palladium-catalysed cyclisation and functionalisation of 1,1-diacetoxy-2,7-diene and 1,1-diacetoxy-2-en-7-yne derivatives

Cedric W. Holzapfel, Lizel Marais

Journal:

Tetrahedron Letters

Year:

1998

Language:

english

File:

PDF, 175 KB

english, 1998

36

Palladium-catalysed substitution reactions of geminal allylic diacetates

Fanie R. van Heerden, Johan J. Huyser, D. Bradley, G. Williams, Cedric W. Holzapfel

Journal:

Tetrahedron Letters

Year:

1998

Language:

english

File:

PDF, 184 KB

english, 1998

37

Photochemical oxidation of partially protected derivatives of α-d-glucofuranose and β-d-fructofuranose

Laetitia Den Drijver, Cedric W. Holzapfel, Martha S. van Dyk, Gert J. Kruger

Journal:

Carbohydrate Research

Year:

1987

File:

PDF, 1.07 MB

1987

38

A facile route to 3a,8a-dihydrofuro[2,3-b]benzofurans

Cedric W. Holzapfel, D. Bradley, G. Williams

Journal:

Year:

1995

Language:

english

File:

PDF, 573 KB

english, 1995

39

Stereocontrolled palladium(0) catalysed cyclisation and cyclisation/carbonylation of pseudoglycal derivatives

Cedric W. Holzapfel, Gerhard J. Engelbrecht, Lizel Marais, Francois Toerien

Journal:

Year:

1997

Language:

english

File:

PDF, 983 KB

english, 1997

40

Stannylene directed selective acylation of some open-chain L-arabinose derivatives

Martin W. Bredenkamp, Cedric W. Holzapfel, Anna D. Swanepoel

Journal:

Tetrahedron Letters

Year:

1990

Language:

english

File:

PDF, 436 KB

english, 1990

41

Macrocyclisation: The tin directed reaction of a carbohydrate derivative with succinyl chloride

Mathys M. Basson, Martin W. Bredenkamp, Cedric W. Holzapfel

Journal:

Tetrahedron Letters

Year:

1989

Language:

english

File:

PDF, 302 KB

english, 1989

42

Palladium-catalysed cascade reactions of unsaturated carbohydrate derivatives. Synthesis of enantiopure tricyclic compounds

Cedric W. Holzapfel, Lizel Marais

Journal:

Tetrahedron Letters

Year:

1997

Language:

english

File:

PDF, 115 KB

english, 1997

43

The Effects of SCILL Catalyst Modification on the Competitive Hydrogenation of 1-Octyne and 1,7-Octadiene versus 1-Octene

Stuart F. Miller, Prof. Holger B. Friedrich, Prof. Cedric W. Holzapfel

Journal:

Year:

2012

Language:

english

File:

PDF, 1.01 MB

english, 2012

44

A chemotaxonomic survey of kaurene derivatives in the genus Alepidea (Apiaceae)

Cedric W. Holzapfel, Ben-Erik Van Wyk, Antonio De Castro, Wilhelmina Marais, Madrie Herbst

Journal:

Biochemical Systematics and Ecology

Year:

1995

Language:

english

File:

PDF, 268 KB

english, 1995

45

Antineoplastic agents. Par 108. Structural biochemistry. Part 23. Synthesis of the dolastatin thiazole amino acid component (gln)Thz

Holzapfel, Cedric W., Pettit, George R.

Journal:

Journal of Organic Chemistry

Year:

1985

Language:

english

File:

PDF, 717 KB

english, 1985

46

The role of essential histidines in the mechanism of catalysis of the flavoenzyme, β-cyclopiazonate oxidocyclase

Daniel J. Steenkamp, Johan C. Schabort, Cedric W. Holzapfel, Nicolas P. Ferreira

Journal:

Biochimica et Biophysica Acta (BBA) - Enzymology

Year:

1974

Language:

english

File:

PDF, 814 KB

english, 1974

47

On a Facile Synthesis of Melatonin and Other Related Indoles

Marais, Wilhelmina, Holzapfel, Cedric W.

Journal:

Synthetic Communications

Year:

1998

Language:

english

File:

PDF, 394 KB

english, 1998

48

Alternative Syntheses of L-(-)-Oleandrose from L-Rhamnose 1 Preparation of Glycals

Bredenkamp, Martin W., Holzapfel, Cedric W., Toerien, Francois

Journal:

Synthetic Communications

Year:

1992

Language:

english

File:

PDF, 703 KB

english, 1992

49

o-Nitrophenyltriflates in Quinoline Synthesis: Easy Access to a Streptonigrin Synthon

W. Holzapfel, Cedric, Dwyer, Catherine

Journal:

Year:

1998

Language:

english

File:

PDF, 144 KB

english, 1998

50

The Chiral Synthesis of Thiazole Amino Acid Enantiomers

Bredenkamp, Martin W., Holzapfel, Cedric W., van Zyl, Wynand J.

Journal:

Synthetic Communications

Year:

1990

Language:

english

File:

PDF, 542 KB

english, 1990

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