Stereospecific transannular cyclization of (Z)- and (E)-thiacyclooct-4-enes: synthesis and carbon-13 nuclear magnetic resonance spectra of substituted cis-1-thioniabicyclo[3.3.0]octane salts. Conformational analysis (force field) of (E)-thiacyclooct-4-ene and its 2- and 3-methyl derivatives

1980 ◽  
Vol 45 (13) ◽  
pp. 2641-2649 ◽  
Author(s):  
Carlo Calderoni ◽  
Vanda Cere ◽  
Salvatore Pollicino ◽  
Edda Sandri ◽  
Antonino Fava ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Conformational Analysis ◽  
Force Field ◽  
Transannular Cyclization ◽  
Nuclear Magnetic Resonance Spectra ◽  
Methyl Derivatives ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

scholarly journals C-Glycosylflavonoids. The chemistry of orientin and iso-orientin

1965 ◽  
Vol 97 (2) ◽  
pp. 444-448 ◽  
Author(s):  
BH Koeppen ◽  
DG ROUX
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Ferric Chloride ◽  
Periodic Acid ◽  
Nuclear Magnetic Resonance Spectra ◽  
Methyl Derivatives ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

1. The structures of orientin and iso-orientin have been investigated by periodic acid and ferric chloride oxidation of the tetra-O-methyl derivatives and by identification of the products of oxidation. 2. The preparation and properties of the 3‣,4‣,7-trimethyl ethers of orientin and iso-orientin are described, and the nuclear-magnetic-resonance spectra of orientin, iso-orientin and their tri- and tetra-O-methyl derivatives are discussed. 3. Orientin and iso-orientin are formulated as 8- and 6-C-beta-d-glucopyranosyl-luteolin respectively.

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