Development of new methods for the synthesis of pharmacologically active compounds [Elektronische Ressource] : synthesis of new immobilized homo- and heterogeneous catalysts for the chemoselective oxidation of alcohols / vorgelegt von Alexandru Gheorghe

Alex

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Informations

• Publié par: universitat_regensburg
• Publié le: 01 janvier 2008
• Nombre de lectures: 31
• Langue: Deutsch
• Poids de l'ouvrage: 4 Mo

Extrait

Development of New Methods for The Synthesis of
Pharmacologically Active Compounds.
Synthesis of New Immobilized Homo- and Heterogeneous
Catalysts for The Chemoselective Oxidation of Alcohols.



Dissertation zur Erlangung
des Doktorgrades der Naturwissenschaften (Dr. rer. nat.)
der Naturwissenschaftlichen Fakultät IV - Chemie und Pharmazie
der Universität Regensburg







vorgelegt von
Alexandru Gheorghe


aus
Bukarest (Rumänien)

Regensburg 2006

















Diese Arbeit wurde angeleitet von Prof. Dr. O. Reiser


Promotionsgesuch eingereicht am: 27 Oktober, 2006


Tag der mündlichen Prüfung: 15 Dezember, 2006


Prüfungsausschluß: Prof. Dr. Hartmut Krienke (Vorsitzender)
Prof. Dr. Oliver Reiser (1. Gutachter)
Prof. Dr. Burkhard König (2. Gutachter)
Prof. Dr. Sigurd Elz (3. Prüfer)





Die vorliegende Arbeit wurde unter der Leitung von Herrn Prof. Dr. O. Reiser in der Zeit von
Oktober 2003 bis Oktober 2006 am Institut für Organische Chemie der Universität
Regensburg angefertigt.


























Herrn Prof. Dr. Oliver Reiser möchte ich für die Überlassung des äußerst interessanten
Themas, die anregenden Diskussionen und stete Unterstützung während der Durchführung
dieser Arbeit danken.





















































In Memory of my Mother


















Table of Contents


1. Synthesis of Functionalized Pyrrolidones and S-Vigabatrin from Pyrrole 1
1.1 Introduction 1
1.2 Aim of this work 2
1.3 Synthesis and scope of homoglutamic ester 8 3
1.4 Vigabatrin: Mode of action 7
1.4.1 Introduction 7
1.4.2 Synthesis of (S)-Vigabatrin 11
1.5 Literature 13
2. Synthesis of the Hydroxyamino Acid Moiety of AI-77-B 16
2.1 Introduction 16
2.2 Aim of this work 18
2.3 Synthesis of the dihydroxyamino acid moiety 18
2.4 Literature 21
3. Expedient Immobilization of TEMPO by Copper-Catalyzed Azide -Alkyne [3+2] 23
Cycloaddition Onto Polystyrene Resin
3.1 Introduction 23
3.2 Aim of this work 25
3.3 Synthesis of polystyrene-supported TEMPO 25
3.4 PS-CLICK-TEMPO oxidation of alcohols using bleach 26
3.5 Mn-Co-TEMPO-catalyzed oxidation of alcohols by oxygen 28
3.6 Literature 31
4. A facile Strategy to a New Fluorous -Tagged, Immobilized TEMPO Catalyst 33
Using a Click Reaction and Its Catalytic Activity
4.1 Introduction 33
4.2 Aim of this work 34
4.3 Synthesis of the novel fluorous-tagged TEMPO catalyst 35
4.4 Catalytic activity and recovery of F -CLICK-TEMPO 53 37 17
4.5 Literature 40
5. Synthesis of Novel Thermoresponsive Perfluorinated Building Blocks 42

by “Click Chemistry”
5.1 Introduction 42
5.2 Aim of this work 44
5.3 Synthesis of building blocks 45
5.4 Synthesis of perfluorinated TEMPOs 46
5.5 Catalytic activity of TEMPOs 62 and 63 46
5.6 Recovery of TEMPOs 62 and 63 51
5.7 Literature 54
6. Synthesis of Novel Perfluorinated Organogelators by “Click Chemistry” 55
6.1 Introduction 55
6.2 Aim of this work 55
6.3 Synthesis of organogelators 56
6.4 Literature 63
7. Summary 65
8. Experimental Section 69
8.1 General 69
8.2 Experimental details 70
8.3 NMR-Spectra 97
9. Appendix 130
Curriculum vitae 130
Publications list 131
Acknowledgments 132












Abbreviations

AIBN azo- isobutyronitrile
Boc tert-butoxycarbonyl
nBuLi n-butyl lithium
nBu SnH tributyltinhydride 3
CI chemical ionisation
CSA (+)-camphorsulfonic acid
m-CPBA m-chloroperbenzoic acid
CNS central nervous system
CuACC copper catalyzed azide-alkyne cycloaddition
DBU 1,8-Diazabicyclo[5.4.0]- undec-7-ene
DCM dichloromethane
Dec. decomposition
DIPEA di(isopropyl)ethylamine
DMF dimethyl fo rmamide
DMSO dimethylsulfoxide
ee enantiomeric excess
EI electron impact (MS)
equiv. equivalent
ES electron spray (MS)
EtOAc ethyl acetate
GABA gamma-aminobutyric acid
GABA-T gamma-aminobutyric acid transaminase
h hours
HPLC high pressure liquid chromatography
HRMS high resolution mass spectrum
IR infra red (spectrum)
J coupling constant
K Kelvin
LiHMDS lithium hexamethyldisilazide
LMWG low-molecular weight gelator
LRMS low resolution mass spectrum

CH CN acetonitrile 3
min minutes
mp melting point
MS mass spectrum
NBS N-bromosuccinimide
NMO 4-methyl morpholine N-oxide
NMR nuclear magnetic resonance
Ph Phenyl
PPh tri-phenyl phosphine 3
rac racemate
rt room temperature
SAM self-assembled monolayers
SEM scanning electron micrograph
SMBC simulated moving bed chromatography
tert tertiary
TEMPO 2,2,6,6-tetramethylpiperidine-1-oxyl
THF tetrahydrofuran
TMSCl trimethylsilyl chloride
TPAP tetra-n-propylammonium per-ruthenate
quant. quantitative