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1

The Wittig Reaction Using Potassium-tert-butoxide High Yield Methylenations of Sterically Hindered Ketones

Fitjer, Lutz, Quabeck, Ulrike

Journal:

Synthetic Communications

Year:

1985

Language:

english

File:

PDF, 306 KB

english, 1985

2

HUNTER: A conformational search program for acyclic to polycyclic molecules with special emphasis on stereochemistry

Weiser, J�rg, Holthausen, Max C., Fitjer, Lutz

Journal:

Journal of Computational Chemistry

Year:

1997

Language:

english

File:

PDF, 451 KB

english, 1997

3

ChemInform Abstract: Polyspiranes. Part 16. Cascade Rearrangements. Part 11. Synthesis, Structure, Conformation, and Dynamics of Heptacyclo(19.3.0.01,5.05,9.09,13.013,17.017,21)tetracosane ((6.5)Coronane).

WEHLE, D., SCHORMANN, N., FITJER, L.

Journal:

Year:

1989

File:

PDF, 173 KB

1989

4

Polyspirane, 91). Umlagerungskaskaden, 41). Über die Verwendbarkeit von Polyspiranen zum Eintritt in Polycyclen-Hyperflächen – Fünf- bzw. neunfache 1,2-Verschiebungen an einem Pentaspiro[3.0.2.0.3.0.2.0.3.1]nonadecan

Lutz Fitjer, Walter Kühn, Ulrich Klages, Ernst Egert, William Clegg, Norbert Schormann, George M. Sheldrick

Journal:

European Journal of Inorganic Chemistry

Year:

1984

File:

PDF, 986 KB

1984

5

Pentacyclo[11.3.0.01,5.05,9.09,13]hexadecane ([4.5]Coronane)

Prof. Dr. Lutz Fitjer, Dipl.-Chem. Ulrike Quabeck

Journal:

Angewandte Chemie International Edition

Year:

1987

Language:

english

File:

PDF, 314 KB

english, 1987

6

Multiple Cyclopropylmethyl-Cyclobutyl-Umlagerungen an einem Pentaspirohexadecanol

Dr. Lutz Fitjer, Detlef Wehle

Journal:

Angewandte Chemie

Year:

1979

Language:

german

File:

PDF, 229 KB

german, 1979

7

Hexaspiro[3.0.3.0.3.0.3.0.3.0.3.0]tetracosan ([6.4]Rotan)

Prof. Dr. Lutz Fitjer, Karl Justus, Peter Puder, Dr. Martin Dittmer, Carla Haßler, Dr. Mathias Noltemeyer

Journal:

Angewandte Chemie

Year:

1991

Language:

german

File:

PDF, 354 KB

german, 1991

8

Theoretische und spektroskopische Untersuchungen an Indigofarbstoffen, XIII Darstellung und Eigenschaften des 3.3′-Dioxo-4.4.4′.4′-tetramethyl-2.2′-biselenolanylidens, einer Verbindung mit dem Grundchromophorsystem des Selenoindigos

Lutz Fitjer, Wolfgang Lüttke

Journal:

European Journal of Inorganic Chemistry

Year:

1972

File:

PDF, 463 KB

1972

9

Cyclobutyl phenyl sulfoxide and (SR)-cyclobutyl p-tolyl sulfoxide: New reagents for the spiroannelation of cyclopentanone

Lutz Fitjer, Werner Schlotmann, Mathias Noltemeyer

Journal:

Tetrahedron Letters

Year:

1995

Language:

english

File:

PDF, 211 KB

english, 1995

10

ChemInform Abstract: Polyspiranes. Part 10. Synthesis and Rearrangement of Functionalized Dispiro- [3.0.3.3]undecanes.

FITJER, L., KANSCHIK, A., MAJEWSKI, M.

Journal:

Chemischer Informationsdienst

Year:

1986

File:

PDF, 131 KB

1986

11

Theoretische und spektroskopische Untersuchungen an Indigofarbstoffen, XIV 1.4.5.8-Tetrasubstituierte Octandione-(3.6) als mögliche Vorstufen zu Indigo-Grundchromophorsystemen

Lutz Fitjer, Wolfgang Lüttke

Journal:

European Journal of Inorganic Chemistry

Year:

1972

File:

PDF, 404 KB

1972

12

Chair/Twist-Boat Energy Gap in Monocyclic, Conformationally Unconstrained Polyalkylcyclohexanes

Weiser, Jörg, Golan, Oren, Fitjer, Lutz, Biali, Silvio E.

Journal:

Journal of Organic Chemistry

Year:

1996

Language:

english

File:

PDF, 305 KB

english, 1996

13

ChemInform Abstract: POLYSPIRANES. 8. CASCADE REARRANGEMENTS. 3. TOWARDS (6.5)CORONANE - FIVEFOLD CYCLOBUTYLMETHYL-CYCLOPENTYL REARRANGEMENT IN A PENTASPIROHENEICOSANOL

FITJER, L., GIERSIG, M., CLEGG, W., SCHORMANN, N., SCHELDRICK, G. M.

Journal:

Chemischer Informationsdienst

Year:

1984

File:

PDF, 123 KB

1984

14

Theoretische und spektroskopische Untersuchungen an Indigofarbstoffen, XV Indigo-Grundchromophorsysteme und Indigo-Grundchromophor-Abbausubstanzen aus 1.4.5.8-tetra-substituierten Octandionen-(3.6)

Lutz Fitjer, Wolfgang Lüttke

Journal:

European Journal of Inorganic Chemistry

Year:

1972

Language:

german

File:

PDF, 534 KB

german, 1972

15

ChemInform Abstract: THE STEREOCHEMISTRY OF THE (2 + 2)-CYCLOADDITIONS OF CYCLOPENTYNE - EVIDENCE FOR AN ANTISYMMETRICAL SINGLET GROUND STATE

FITJER, L., MODARESSI, S.

Journal:

Chemischer Informationsdienst

Year:

1984

File:

PDF, 118 KB

1984

16

Polyspirane, 14. — Umlagerungskaskaden, 9. Fünffache Cyclobutylmethyl-Cyclopentyl-Umlagerung an einem Pentaspiro[3.0.3.0.3.0.3.0.3.1]henicosanol — Eine Schlüsselsequenz zur Synthese des [6.5]Coronans

Manfred Giersig, Detlef Wehle, Lutz Fitjer, Norbert Schormann, William Clegg

Journal:

European Journal of Inorganic Chemistry

Year:

1988

File:

PDF, 757 KB

1988

17

Synthesis of tricyclopentanoid sesquiterpenes via rearrangement routes: (±)-modhephene, (±)-epimodhephene and (±)-isocomene

Lutz Fitjer, Marita Majewski, Honorato Monzó-Oltra

Journal:

Year:

1995

Language:

english

File:

PDF, 1.29 MB

english, 1995

18

Synthesis and rearrangement of functionalized dispiro[2.1.3.3]Undecanes - preferred C4C5 over C3C4 ring enlargements

Lutz Fitjer, Marita Majewski, Andreas Kanschik, Ernst Egert, George M Sheldrick

Journal:

Tetrahedron Letters

Year:

1986

Language:

english

File:

PDF, 232 KB

english, 1986

19

ChemInform Abstract: Polyspiranes. Part 12. Cascade Rearrangements. Part 7. Heptacyclo(19.3.0.01,5.05,9.09,13.013,17.017,21)tetracosane ((6.5)Coronane).

WEHLE, D., FITJER, L.

Journal:

Year:

1987

File:

PDF, 134 KB

1987

20

ChemInform Abstract: Sterically Crowded Cyclohexanes. Part 7. Synthesis, Crystal Structure, Conformation and Dynamics of Hexaspiro(2.0.3.0.2.0.3.0.3.0.3.0)docosane and Hexaspiro(2.0.3.0.3.0.3.0.3.0.3.0)tricosane.

FITJER, L., GIERSIG, M., WEHLE, D., DITTMER, M., KOLTERMANN, G.-W., SCHORMANN, N., EGERT, E.

Journal:

Year:

1988

File:

PDF, 193 KB

1988

21

Heptacyclo[19.3.0.01,5.05,9.09,13.013,17.017,21]tetracosan ([6.5]Coronan)

Detlef Wehle, Prof. Dr. Lutz Fitjer

Journal:

Angewandte Chemie

Year:

1987

Language:

german

File:

PDF, 331 KB

german, 1987

22

Heptacyclo[19.3.0.01,5.05,9.09,13.013,17.017,21]-tetracosane([6.5]coronane)

Dipl.-Chem. Detlef Wehle, Prof. Dr. Lutz Fitjer

Journal:

Angewandte Chemie International Edition

Year:

1987

Language:

english

File:

PDF, 365 KB

english, 1987

23

ChemInform Abstract: Sterically Crowded Cyclohexanes. Part 8. Synthesis, Crystal Structure, Conformation and Dynamics of Pentaspiro(2.0.2.0.2.0.2.0.2.1)hexadecane, Pentaspiro(3.0.2.0.3.0.2.0.3.1)nonadecane and Pentaspiro(3.0.3.0.3.0.3.0.3.1)heneicosane.

FITJER, L., KLAGES, U., WEHLE, D., GIERSIG, M., SCHORMANN, N., CLEGG, W., STEPHENSON, D. S., BINSCH, G.

Journal:

Year:

1988

File:

PDF, 114 KB

1988

24

Isomerizations of Alkenylidenecyclopropanes Catalyzed by Lewis Acids

Dr. Lutz Fitjer

Journal:

Angewandte Chemie International Edition

Year:

1975

Language:

english

File:

PDF, 223 KB

english, 1975

25

ChemInform Abstract: Cascade Rearrangements. Part 21. Mono- and Bicyclic Cyclopentenes by Rearrangement of 1-Methylcyclobutylmethanols: Synthesis of (.+-.)-Cuparene and Formal Syntheses of (.+-.)-Laurene and (.+-.)-Herbertene.

K. MANDELT, L. FITJER

Journal:

Year:

1999

File:

PDF, 34 KB

1999

26

Helical primary structures of 1,2-spiroannelated five-membered rings: attempted synthesis of (±)-tetraspiro[4.0.0.0.4.3.3.3]heneicosane

Tien Widjaja, Lutz Fitjer, Kathrin Meindl, Regine Herbst-Irmer

Journal:

Year:

2008

Language:

english

File:

PDF, 375 KB

english, 2008

27

A rearrangement approach to (±)-cerapicol

Nizar El-Hachach, Matthias Fischbach, Ralf Gerke, Lutz Fitjer

Journal:

Year:

1999

Language:

english

File:

PDF, 601 KB

english, 1999

28

MM3 parameters for carbocations

David Strobl, Jörg Weiser, Lutz Fitjer

Journal:

Year:

1997

Language:

english

File:

PDF, 378 KB

english, 1997

29

Towards a synthesis of (±)modhephene via cascade rearrangement: Synthesis and rearrangement of dispiro[3.0.4.2]undecanes to [3.3.3]propellanes

Lutz Fitjer, Marita Majewski, Andreas Kanschik

Journal:

Tetrahedron Letters

Year:

1988

Language:

english

File:

PDF, 147 KB

english, 1988

30

Durch Lewis-Säuren katalysierte Isomerisierungen von Alkenylidencyclopropanen

Dr. Lutz Fitjer

Journal:

Angewandte Chemie

Year:

1975

Language:

german

File:

PDF, 233 KB

german, 1975

31

Polyspirane, 7. Umlagerungskaskaden, 2: Von Polyspiranen zu Polycyclen – Sechsfache 1,2-Verschiebungen an funktionalisierten Pentaspiro[2.0.2.0.2.0.2.0.2.1]hexadecanen

Lutz Fitjer, Detlef Wehle, Mathias Noltemeyer, Ernst Egert, George M. Sheldrick

Journal:

European Journal of Inorganic Chemistry

Year:

1984

File:

PDF, 955 KB

1984

32

Helical primary structures of four-membered rings: (M)-trispiro[3.0.0.3.2.2]tridecane

Lutz Fitjer, Ralf Gerke, Jörg Weiser, Gabor Bunkoczi, Judit E Debreczeni

Journal:

Year:

2003

Language:

english

File:

PDF, 298 KB

english, 2003

33

Permethylcyclohexane

Lutz Fitjer, Hans-Jörg Scheuermann, Detlef Wehle

Journal:

Tetrahedron Letters

Year:

1984

Language:

english

File:

PDF, 255 KB

english, 1984

34

Synthesis of (3a R ,6a R )-2,2,5,6-Tetramethyl-1,2,3,3a,4,6a-hexahydropentalene: A Potential Precursor of Protoilludane Sesquiterpenes

Fitjer, Lutz, Gerke, Ralf, Anger, Thorsten

Journal:

Year:

1994

File:

PDF, 214 KB

1994

35

ChemInform Abstract: Towards a Synthesis of (.+-.)-Modhephene via Cascade Rearrangement: Synthesis and Rearrangement of Dispiro(3.0.4.2)undecanes (IV) and (VIII) to (3.3.3)Propellanes (V) and (IX).

FITJER, L., MAJEWSKI, M., KANSCHIK, A.

Journal:

Year:

1988

File:

PDF, 96 KB

1988

36

ChemInform Abstract: TRICYCLOPROPYLIDEN-((3)-ROTAN)

FITJER, LUTZ, CONIA, JEAN-MARIE

Journal:

Chemischer Informationsdienst

Year:

1973

File:

PDF, 112 KB

1973

37

ChemInform Abstract: THEORETISCHE UND SPEKTROSKOPISCHE UNTERSUCHUNGEN AN INDIGORFARBSTOFFEN 15. MITT. INDIGO-GRUNDCHROMOPHORSYST. UND INDIGO-GRUNDCHROMOPHOR-ABBAUSUBSTANZEN AUS 1,4,5,8-TETRASUBSTITUIERTEN OCTANDIONEN-(3,6)

FITJER, LUTZ, LUETTKE, WOLFGANG

Journal:

Chemischer Informationsdienst

Year:

1972

File:

PDF, 236 KB

1972

38

(±)Modhephene and (±)isocomene via cascade rearrangement

Lutz Fitjer, Andreas Kanschik, Marita Majewski

Journal:

Tetrahedron Letters

Year:

1988

Language:

english

File:

PDF, 268 KB

english, 1988

39

Rearrangement of (-)-.beta.-Caryophyllene. A Product Analysis and Force Field Study

Fitjer, Lutz, Malich, Andreas, Paschke, Carola, Kluge, Sabine, Gerke, Ralf, Rissom, Beate, Weiser, Joerg, Noltemeyer, Mathias

Journal:

Journal of the American Chemical Society

Year:

1995

Language:

english

File:

PDF, 1.25 MB

english, 1995

40

Polyspiranes. 22. Cascade rearrangements. 16. Stereospecific rearrangements in tricyclopentanoid sesquiterpenes: the absolute configuration of (-)-isocomene, (-)-.beta.-isocomene, and (-)-silphinene

Fitjer, Lutz, Monzo-Oltra, Honorato

Journal:

Journal of Organic Chemistry

Year:

1993

Language:

english

File:

PDF, 293 KB

english, 1993

41

ChemInform Abstract: CYCLOALKYNES. PART 1. (2 + 2)-CYCLOADDITIONS OF CYCLOPENTYNE

FITJER, L., KLIEBISCH, U., WEHLE, D., MODARESSI, S.

Journal:

Chemischer Informationsdienst

Year:

1982

File:

PDF, 135 KB

1982

42

ChemInform Abstract: POLYSPIRANES. 4. SYNTHESES AND COUPLING REACTIONS OF VINYLCYCLOPROPANES AND VINYLIDENEDICYCLOPROPANES HALOGENATED IN ALLYLIC POSITIONS

Journal:

Chemischer Informationsdienst

Year:

1982

File:

PDF, 165 KB

1982

43

ChemInform Abstract: POLYSPIRANES. 3. MULTIPLE CYCLOPROPYLMETHYL-CYCLOBUTYL REARRANGEMENTS TO A PENTASPIROHEXADECANE

FITJER, L., WEHLE, D.

Journal:

Chemischer Informationsdienst

Year:

1980

File:

PDF, 211 KB

1980

44

Conformational isomerism in a fully substituted cyclohexane

Detlef Wehle, Lutz Fitjer

Journal:

Tetrahedron Letters

Year:

1986

Language:

english

File:

PDF, 207 KB

english, 1986

45

Cyclobutyl phenyl sulfoxide and (SR)-cyclobutyl p-tolyl sulfoxide: new reagents for the spiroannelation of cyclopentanone

Journal:

Tetrahedron Letters

Year:

1995

Language:

english

File:

PDF, 211 KB

english, 1995

46

ChemInform Abstract: 1,1-BIFUNCTIONAL CYCLOPROPANES, CONVENIENT SYNTHESIS OF 1-BROMO- 1-CHLORO- AND 1-FLUOROCYCLOPROPYL METHYL KETONE

Journal:

Chemischer Informationsdienst

Year:

1977

File:

PDF, 112 KB

1977

47

ChemInform Abstract: Sterically Crowded Cyclohexanes. Part 3. 4,4,8,8,12,12-Hexamethyltrispiro[2.1.2.1.2.1]dodecane and 4,4,8,8,9,9,10,10-Octamethyldispiro[2.1.2.3]decane - Two Per(cyclo)alkylated Cyclohexanes Adopting a Twistboat Conformation.

FITJER, L., SCHEUERMANN, H.-J., KLAGES, U., WEHLE, D., STEPHENSON, D. S., BINSCH, G.

Journal:

Chemischer Informationsdienst

Year:

1986

File:

PDF, 241 KB

1986

48

Coupling Reactions of Vinylidenedicyclopropanes Doubly Halogenated in Allylic Positions—A Productive Synthesis of Trispiro[2.0.2.0.2.0]nonane([3]Rotane)

Dr. Lutz Fitjer

Journal:

Angewandte Chemie International Edition

Year:

1976

Language:

english

File:

PDF, 201 KB

english, 1976

49

Polyspirane, 4. Synthesen und Kupplungsreaktionen allylständig halogenierter Vinylcyclopropane und Vinylidendicyclopropane

Journal:

European Journal of Inorganic Chemistry

Year:

1982

Language:

german

File:

PDF, 682 KB

german, 1982

50

Sterically crowded cyclohexanes - 71). synthesis, crystal structure, conformation and dynamics of hexaspiro[2.0.3.0.2.0.3.0.3.0.3.0]docosane and hexaspiro[2.0.3.0.3.0.3.0.3.0.3.0]tricosane

Lutz Fitjer, Manfred Giersig, Detlef Wehle, Martin Dittmer, Georg-Wilhelm Koltermann, Norbert Schormann, Ernst Egert

Journal:

Year:

1988

Language:

english

File:

PDF, 1.02 MB

english, 1988

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