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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

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

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

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

6

Tricyclopropyliden ([3]-Rotan)

Lutz Fitjer, Prof. Dr. Jean-Marie Conia

Journal:

Angewandte Chemie

Year:

1973

Language:

german

File:

PDF, 215 KB

german, 1973

7

Eliminierungen am Dreiring_Cyclopropyl-cyclopropen und Bicyclopropyliden aus 1-Chlor-bicyclopropyl

Lutz Fitjer, Prof. Dr. Jean-Marie Conia

Journal:

Angewandte Chemie

Year:

1973

Language:

german

File:

PDF, 321 KB

german, 1973

8

Thermische Isomerisierung von Cyclopropyliden-spiropentan – ein ungewöhnlicher Weg zu Tricyclopropyliden ([3]-Rotan)

Dr. Lutz Fitjer, Prof. Dr. Jean-Marie Conia

Journal:

Angewandte Chemie

Year:

1973

Language:

german

File:

PDF, 212 KB

german, 1973

9

Durch Lewis-Säuren katalysierte Isomerisierungen von Alkenylidencyclopropanen

Dr. Lutz Fitjer

Journal:

Angewandte Chemie

Year:

1975

Language:

german

File:

PDF, 233 KB

german, 1975

10

Eine universelle Rotan-Synthese - Hexaspire [2.0.2.0.2.0.2.0.2.0.2.0]octadecan ([6]-Rotan)

Dr. Lutz Fitjer

Journal:

Angewandte Chemie

Year:

1976

Language:

german

File:

PDF, 204 KB

german, 1976

11

Kupplungsreaktionen doppelt allylständig halogenierter Vinylidendicyclopropane – eine ergiebige Synthese für Trispiro [2.0.2.0.2.0]nonan ([3]-Rotan)

Dr. Lutz Fitjer

Journal:

Angewandte Chemie

Year:

1976

File:

PDF, 203 KB

1976

12

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

13

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

14

Pentacyclo[11.3.0.01,5.05,9.09,13]hexadecan ([4.5]Coronan)

Prof. Dr. Lutz Fitjer, Ulrike Quabeck

Journal:

Angewandte Chemie

Year:

1987

Language:

german

File:

PDF, 302 KB

german, 1987

15

Von Tetraspiranen zu Bispropellanen

Prof. Dr. Lutz Fitjer, Ulrike Quabeck

Journal:

Angewandte Chemie

Year:

1989

Language:

german

File:

PDF, 363 KB

german, 1989

16

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

17

Synthese, absolute Konfiguration und spezifische Drehung von (+)- und (−)-Modhephen

Prof. Dr. Lutz Fitjer, Honorato Monzó Oltra, Dr. Mathias Noltemeyer

Journal:

Angewandte Chemie

Year:

1991

File:

PDF, 367 KB

1991

18

Tricyclopropylidene ([3]-Rotane)

Dr. Lutz Fitjer, Prof. Dr. Jean-Marie Conia

Journal:

Angewandte Chemie International Edition

Year:

1973

Language:

english

File:

PDF, 215 KB

english, 1973

19

Eliminations from Three-Membered Rings: Cyclopropylcyclopropene and Bicyclopropylidene from 1-Chiorobicyclopropyl

Dr. Lutz Fitjer, Prof. Dr. Jean-Marie Conia

Journal:

Angewandte Chemie International Edition

Year:

1973

Language:

english

File:

PDF, 321 KB

english, 1973

20

Thermal Isomerization of Cyclopropylidenespiropentane—An Unusual Route to Tricyclopropylidene ([3]-Rotane)

Dr. Lutz Fitjer, Prof. Dr. Jean-Marie Conia

Journal:

Angewandte Chemie International Edition

Year:

1973

Language:

english

File:

PDF, 205 KB

english, 1973

21

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

22

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

23

A Universal Rotane Synthesis—Hexaspiro[2.0.2.0.2.0.2.0.2.0.2.0]octadecane([6]Rotane)

Dr. Lutz Fitjer

Journal:

Angewandte Chemie International Edition

Year:

1976

Language:

english

File:

PDF, 204 KB

english, 1976

24

Multiple Cyclopropylmethyl-Cyclobutyl Rearrangements in a Pentaspirohexadecanol

Priv.-Doz. Dr. Lutz Fitjer, Detlef Wehle

Journal:

Angewandte Chemie International Edition

Year:

1979

Language:

english

File:

PDF, 234 KB

english, 1979

25

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

26

From Tetraspiranes to Bispropellanes

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

Journal:

Angewandte Chemie International Edition

Year:

1989

Language:

english

File:

PDF, 226 KB

english, 1989

27

Hexaspiro[3.0.3.0.3.0.3.0.3.0.3.0]tetracosane ([6.4]Rotane)

Prof. Dr. Lutz Fitjer, Dipl.-Chem. Karl Justus, Dipl.-Chem. Peter Puder, Dr. Martin Dittmer, Dipl.-Chem. Carla Hassler, Dr. Mathias Noltemeyer

Journal:

Angewandte Chemie International Edition

Year:

1991

Language:

english

File:

PDF, 374 KB

english, 1991

28

Synthesis, Absolute Configuration and Specific Rotation of (+)- and (−)-Modhephene

Prof. Dr. Lutz Fitjer, Dipl.-Chem. Honorato Monzó Oltra, Dr. Mathias Noltemeyer

Journal:

Angewandte Chemie International Edition

Year:

1991

Language:

english

File:

PDF, 371 KB

english, 1991

29

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

30

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

31

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

32

Theoretische und spektroskopische Untersuchungen an Indigofarbstoffen, XII Heterocyclische Fünfringketone aus 1.4-disubstituierten Butanonen-(2): 4.4-Dimethyl-pyrrolidon-(3), 4.4-Dimethyl-thiolanon-(3) und 4.4-Dimethyl-selenolanon-(3)

Lutz Fitjer, Wolfgang Lüttke

Journal:

European Journal of Inorganic Chemistry

Year:

1972

File:

PDF, 638 KB

1972

33

Polyspirane, 5. Synthese und Reaktionen funktionalisierter Polyspirane mit drei- bis achtgliedrigem Zentralring – Polycyclopropylidene ([n]Rotane)

Journal:

European Journal of Inorganic Chemistry

Year:

1982

Language:

german

File:

PDF, 815 KB

german, 1982

34

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

35

Polyspirane, 6. Versuche zur direkten Homologisierung von Trispiro[2.0.2.0.2.1]decan-10-on und 10-(Benzolsulfonimido)-trispiro[2.0.2.0.2.1]decan mit Diazocyclopropan

Lutz Fitjer, Detlef Wehle

Journal:

European Journal of Inorganic Chemistry

Year:

1982

File:

PDF, 466 KB

1982

36

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

37

Sterisch überladene Cyclohexane, 4. Zur Homologisierung von Hexamethylcyclobutanon: Octamethylcyclopentanon und Decamethylcyclohexanon

Lutz Fitjer, Detlef Wehle, Hans-Jörg Scheuermann

Journal:

European Journal of Inorganic Chemistry

Year:

1986

Language:

german

File:

PDF, 720 KB

german, 1986

38

Sterisch überladene Cyclohexane, 3. 4,4,8,8,12,12-Hexamethyltrispiro[2.1.2.1.2.1]dodecan und 4,4,8,8,9,9,10,10-Octamethyldispiro[2.1.2.3]decan – Zwei per(cyclo)alkylierte Cyclohexane in Twistbootkonformation

Lutz Fitjer, Hans-Jörg Scheuermann, Ulrich Klages, Detlef Wehle, David S. Stephenson, Gerhard Binsch

Journal:

European Journal of Inorganic Chemistry

Year:

1986

Language:

german

File:

PDF, 946 KB

german, 1986

39

Sterisch überladene Cyclohexane, 5. Synthese, Konformation und Dynamik von 4,4,5,5,6,6,7,7,8,8-Decamethylspiro[2.5]octan und Dodecamethylcyclohexan

Detlef Wehle, Hans-Jörg Scheuermann, Lutz Fitjer

Journal:

European Journal of Inorganic Chemistry

Year:

1986

File:

PDF, 767 KB

1986

40

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

41

Polyspirane, 16. – Umlagerungskaskaden, 11. Synthese, Struktur, Konformation und Dynamik von Heptacyclo[19.3.0.01,5.05,9.09,13.0 13,17.017,21]tetracosan ([6.5]Coronan)

Detlef Wehle, Norbert Schormann, Lutz Fitjer

Journal:

European Journal of Inorganic Chemistry

Year:

1988

Language:

german

File:

PDF, 756 KB

german, 1988

42

ChemInform Abstract: Sterically Crowded Cyclohexanes. Part 10. Synthesis, Conformation and Dynamics of 8,8,13,13-Tetramethyltetraspiro(2.0.3.1.3.1.3.0) heptadecane.

B. RISSOM, L. FITJER

Journal:

Year:

1997

File:

PDF, 33 KB

1997

43

ChemInform Abstract: Conformation and Dynamics of (-)-β-Caryophyllene.

M. HUEBNER, B. RISSOM, L. FITJER

Journal:

Year:

1997

File:

PDF, 25 KB

1997

44

ChemInform Abstract: Cascade Rearrangements. Part 22. The Bicyclobutylidene to Bicyclooctene Rearrangement: Formal Syntheses of (.+-.)-Ceratopicanol and (.+-.)-Hirsutene.

T. ANGER, O. GRAALMANN, H. SCHROEDER, R. GERKE, U. KAISER, L. FITJER, M. NOLTEMEYER

Journal:

Year:

1998

File:

PDF, 43 KB

1998

45

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

46

The molecular structure and conformation of per-alkylated cyclohexanes Part I. 4,4,8,8,12,12-Hexamethyltrispiro [2,1,2,1,2,1] dodecane

M. Traetteberg, P. Bakken, R. Seip, L. Fitjer, H.J. Scheuermann

Journal:

Journal of Molecular Structure

Year:

1987

Language:

english

File:

PDF, 605 KB

english, 1987

47

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

48

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

49

A new approach to helical primary structures of four-membered rings: (P)- and (M)-tetraspiro[3.0.0.0.3.2.2.2]hexadecane

Lutz Fitjer, Andreas Kanschik, Ralf Gerke

Journal:

Year:

2004

Language:

english

File:

PDF, 328 KB

english, 2004

50

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