The reaction of n-butyllithium with diphenylacetylene: structure elucidation of the mono- and dilithio product by one- and two-dimensional NMR spectroscopy, x-ray analysis, and MNDO calculations. Agostic activation by lithium

1988 ◽  
Vol 110 (18) ◽  
pp. 6033-6046 ◽  
Author(s):  
Walter. Bauer ◽  
Martin. Feigel ◽  
Gerhard. Mueller ◽  
Paul v. R. Schleyer
Keyword(s):  
Nmr Spectroscopy ◽  
Structure Elucidation ◽  
Two Dimensional ◽  
X Ray ◽  
Mndo Calculations

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.

Facile Synthesis of 4,5-Dihydro-1,3,4-Thiadiazoles by 1,3-Dipolar Cycloaddition of Thioisomünchnones

2009 ◽  
Vol 62 (4) ◽  
pp. 356 ◽  
Author(s):  
Bárbara Sánchez ◽  
José Luis Bravo ◽  
María Josí Arívalo ◽  
Ignacio López ◽  
Mark E. Light ◽  
...  
Keyword(s):  
Structure Analysis ◽  
Structure Elucidation ◽  
Room Temperature ◽  
Dipolar Cycloaddition ◽  
Two Dimensional ◽  
Facile Synthesis ◽  
X Ray ◽  
Mild Conditions ◽  
Nmr Techniques

The present paper summarizes a straightforward synthesis of 4,5-dihydro-1,3,4-thiadiazoles by the 1,3-dipolar cycloaddition of thioisomünchnones. These reactions have been carried out in dichloromethane and are essentially complete within 60 min at room temperature. Under such mild conditions the asymmetric version has been explored as well. Unequivocal structure elucidation has been accomplished by means of one- and two-dimensional NMR techniques as well as X-ray structure analysis.

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.

scholarly journals Hydroxylated PCB Derivatives. Synthesis and Structure Elucidation by NMR Spectroscopy and X-Ray Diffraction.

1994 ◽  
Vol 48 ◽  
pp. 684-688 ◽  
Author(s):  
Erkki Mannila ◽  
Erkki Kolehmainen ◽  
Kari Rissanen ◽  
Graciela Andrei ◽  
Robert Snoeck ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Structure Elucidation ◽  
X Ray Diffraction ◽  
X Ray
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