HELVETICA CHEMICA ACTA

1999 - Vol. 82
No. I
1-141

Temperature-Dependent MNR and CD Spectra of beta-Peplidcs: I
On the Thermal Stability of beta Peplide Helices Is llie Folding
Process of beta Peptides Non-cooperative?
k. Gademann,, B. Juun, D. Seebach*, R. Perozzo, L. Scapozza,
G. Folkers

7-Halogenated 7-Deaza-2'-deoxyinosines 12
N. Ramzaeve, C. Mitteilbach, F. Seela*

New Synthesis of 18-Norcstradiol 30
A. Kuhl, H. Kareln, W. Kreiser*

Ab inilio Structure Determination of [(Dimetliylamino) 35
methyleneJbis(phosplionic Acid] Dihydrale from X-Ray Powder
Diffiraction Data: Comparison with [he Corresponding
Monollydrate and Unhydrated Form

A. Neels*, H. Stoakli-Evans, B. Costisella,h. Jancke,
K. D. Knudsen, P. Pattison

Identification of m-Mentha-3(8),6-diene (Isosylveterpinolene)
in Black Pepper Oil 53

C. Nusshunmer, R. Cadalbert,p.karft*


Konfigurations- und konformationsisomere paratrope, rotalionsdynamisclie
Teti-aepoxy[32]annulene(6.2.6.2) und diatrope
Tetraoxa[30]porphyrin(6.2.6.2)-Dikationen: Nachweis eines
Tetraepoxy[31]annulen(6.2.6.2)-Radikalkations G. Markl*, R. Ehrl. H. Sauer, P.
Kreitmeier, T. Burgemeister

Nonenzymatic Hydrolysis of Cocaine via Intramolecular 85 Acid Catalysis P. Li,
K. Zhao*, S. Deng, D. W. Landry*

Enantioselective Deprotonation/Electrophile Addition Reactions of
Tricarbonyl(phenyl carbarnate)chromium Complexes A. Quattropani,G.
Bernardinelli, E. P. Kundig*
The High-Anti Conformation of 7-Halogcnated 8-Aza-7- 105
deaza-2'-deoxyguanosineii: A Study of the Infhicnce of Modified Bases on the
Sugar Structure of Nlicleosides F. Seela*, G. Becher, H. Rosemeyer, H. Reuter,
G. Kusiner, 1. A. Mikhailopulo

New, Axially Chiral, Bimetallic Catalysis for Asymmetric Alkylation ofAldehydes
with Diethyl^inc

f.: Keller, A. J. Rippert*

A Convenient Synthesis ofAromatic-Ring-Slilislituled Diacetylencs A. Sarkar*, S.
Okada, h. Nakanishi, H. Matsuda

Nucleotides. Part LVIII. Synthesis and Biological Activity
of(2'-5')oligoadenylate Triniers Containing a 5'-Terminal 5'-Amino-5'-deoxy- or
5'-Ammo-3',5'-dideoxyadenosine Derivative

E. l. Kvasyuk.l. A. Mikhailopulo. W. Homan, K. T. lacono N. F. Muto, R. J.
Sulunhinik, W. Pfleiderer*

Catalytic Antibodies by Fluorescence Screening 44 N. Bensel. N. Bahr, M. T.
Reymand, C. Schenkels, J.-L. Reymond*

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HELVETICA CHIMICA ACTA
VOL:82, NO:6, 1999
Self-Assembly of Synihetic Zinc Chlorins in Aqueous 797
Microheterogeneous Media to an Artificial Supramolecular
Light-Harvesting Device
T. Miyuiuke, H. Tumiaki*, A. R. Holzwarth*, K. Schuffncr

Variable Coordination Modes Realized with a Dihydroxy- 811
alkyidiphosphane as a Hemilabile Ligand: A Combined
103Rh-NMR and Density-Functional Study
M. Bithi, W. Bilamitnn*, R. Kadirov, A. Borncr*

Total Asymmetric Synthesis of Doubly Branched Carba- 821
hexopyranoses and Amino Derivatives Starting from the
Diesl-Alder Adducts of Maleic Anhydride to furfuryl Estcrs
N. JoilerwHi, P. Vogel*, K. Scheiik

Electrochemical Synthesis and Structure Analysis of 848
Neocoenzyme B12- An Epimer of Coenzyme B12
with a Remarkably Flexible Organometallic Group
G. Koontaaxis, D. Riether, R. Hannak, M. Toliinger, B. Krautler

Development of a Capillary Electrophoresis Method to 870
Monitor Protein Oxidation and Antioxidant Protection
A. Siliri, P.-A. Carrupt, B. Testa*

Nucleotides. Part LXII. Pyridinium Salts - An Effective 879
Class of Catalysts for Oligonucleotide Synthesis
M. Beier, W. Pfleiderer

A Novel Acid-Catalyzed Isomerization of Alb-Containing 888
Tiliodipeptides
J. Lehmann A. Linden, H. Heimgartner

Studies on the Reactivity of alpha-C'yano-alpha-isocyanoalkanoates 909
- Versatile Synthons For the Assembly of lmidazoles
M. Bergemann, R. Neidlen

Synthesis of Zn-, Mn-, and Fe-Containing Mono- and 919
Heterometallated Ethanediyl-Bridged Porphyrin Dimers
V. V. Borovkov J. M. Lintuluoto, Y. lnouv*

Transition-Metal-Catalyzed Carbenoid Reactions of 935
Sulfoniuim Ylides
P. Muller*, D. Fernandez, P. Nury J.-C. Rossier

Reactions of Thioketones with Dichlorocarbene 946
G. Mloston*, J. Romanski., A. Swiatec, H. Heimgartner

Preparation and NMR Structure of the Cyclo-beta-tripeptide 957
[beta3-HGlu]3 in Aqueous Solution: A New Clsss of Entrobactin
Type C3-Syinmetric Ligands?
K.Gademann, D. Seebach

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