ChemInform Abstract: PEPTIDE CONFORMATIONS. 22. THE CONFORMATION OF CYCLO(PRO2-(NB)GLY) IN CRYSTAL AND SOLUTION BY X-RAY ANALYSIS AND ONE- AND TWO-DIMENSIONAL NMR SPECTROSCOPY

1983 ◽  
Vol 14 (18) ◽  
Author(s):  
H. KESSLER ◽  
R. SCHUCK ◽  
R. SIEGMEIER ◽  
J. W. BATS ◽  
H. FUESS ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Two Dimensional ◽  
X Ray ◽  
Peptide Conformations

Terpyridine - Ruthenium Complexes as Building Blocks for New Metallo-Supramolecular Architectures

2004 ◽  
Vol 57 (5) ◽  
pp. 419 ◽  
Author(s):  
Harald Hofmeier ◽  
Philip R. Andres ◽  
Richard Hoogenboom ◽  
Eberhardt Herdtweck ◽  
Ulrich S. Schubert
Keyword(s):  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
Functional Groups ◽  
Building Blocks ◽  
Two Dimensional ◽  
X Ray ◽  
Supramolecular Architectures ◽  
Directed Synthesis ◽  
Materials Research ◽  
Terpyridine Ligands

Supramolecular architectures are of great interest in modern materials research. The directed synthesis of asym-metric 2,2′:6′,2′′-terpyridine ruthenium(II) complexes is an important tool towards such systems. In this contribution, we report the synthesis of asymmetric terpyridine ruthenium(II) complexes as models for supramolecular architectures and polymers. Terpyridines, bearing different functional groups in the 4′-position, were complexed with unfunctionalized terpyridine ligands using Ru(III)/Ru(II) chemistry. The resulting compounds were characterized by UV-vis, one- and two-dimensional NMR spectroscopy as well as MALDI-TOF mass spectrometry. In addition, X-ray structure analysis was performed for one selected example.

Dimer oder nicht dimer, das ist hier die Frage: Zwei benachbarte I3–--Ionen eingeschlossen in Hohlr¨aumen einer komplexen Wirtsstruktur

2010 ◽  
Vol 65 (12) ◽  
pp. 1462-1466 ◽  
Author(s):  
Michaela K. Meyer ◽  
Jürgen Graf ◽  
Guido J. Reiß
Keyword(s):  
Nmr Spectroscopy ◽  
Hydrogen Bonds ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Dimensional Network ◽  
Oder Nicht ◽  
Bonding Interaction ◽  
Hydrogen Bonded

[Me(HO)2P-(CH2)10-P(O)OHMe]2[I3]2・MeHO(O)P-(CH2)10-P(O)OHMe (1) was synthesized and characterized by IR, Raman and NMR spectroscopy. Its structure was determined by singlecrystal X-ray diffraction (T = 100 K; space group P1̄). The structure consists of decane-1,10-diyl-bis- (methylphosphinic acid) molecules and the analogous mono-protonated cations in a ratio 1:2 connected with each other by strong O-H···O hydrogen bonds to form a two-dimensional network. Between these hydrogen-bonded layers, there are elongated cavities each containing two triiodide anions. The intermolecular I· · · I distance of the two enclosed triiodide anions is 3.6317(4) Å and should be considered as an interhalogen bonding interaction.

Synthesis of novel α-aminoecdysteroids via regio- and stereoselective oximation/hydrogenation of 20-hydroxyecdysone derivatives

2017 ◽  
Vol 95 (2) ◽  
pp. 130-133 ◽  
Author(s):  
Rimma G. Savchenko ◽  
Svetlana A. Kostyleva ◽  
Ekaterina S. Meshcheryakova ◽  
Leonard M. Khalilov ◽  
Lyudmila V. Parfenova ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Two Dimensional ◽  
One Dimensional ◽  
X Ray ◽  
X Ray Crystallography ◽  
C Nmr

Oximation of 20-hydroxyecdysone oxo derivatives proceeds regio- and stereoselectively and provides (E)-configured oximes in quantitative yields. The Ni–Ra-catalyzed hydrogenation of the oximes affords novel α-aminoecdysteroids with the unchanged 14α-hydroxy-7-en-6-on native chromophore of ecdysteroids. The structures of synthesized compounds were confirmed by the means of homo- and heteronuclear one-dimensional and two-dimensional 1H and 13C NMR spectroscopy and X-ray crystallography.

scholarly journals Bathyptilones: Terpenoids from an Antarctic Sea Pen, Anthoptilum grandiflorum (Verrill, 1879)

Marine Drugs ◽  
2019 ◽  
Vol 17 (9) ◽  
pp. 513 ◽  
Author(s):  
Santana A.L. Thomas ◽  
Anthony Sanchez ◽  
Younghoon Kee ◽  
Nerida G. Wilson ◽  
Bill J. Baker
Keyword(s):  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
Cell Line ◽  
Structure Elucidation ◽  
Two Dimensional ◽  
Mammalian Cell Line ◽  
X Ray ◽  
X Ray Crystallography ◽  
Austral Autumn ◽  
Skeleton Structure

An Antarctic coral belonging to the order Pennatulacea, collected during the 2013 austral autumn by trawl from 662 to 944 m depth, has yielded three new briarane diterpenes, bathyptilone A-C (1–3) along with a trinorditerpene, enbepeanone A (4), which bears a new carbon skeleton. Structure elucidation was facilitated by one- and two-dimensional NMR spectroscopy, mass spectrometry and confirmed by X-ray crystallography. The three compounds were screened in four cancer cell lines. Bathyptilone A displayed selective nanomolar cytotoxicity against the neurogenic mammalian cell line Ntera-2.

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