The absolute configuration of the diterpenoid 9,12-cyclomulin-13-ol (1), a constituent of Azorella and Laretia species, has been established by vibrational circular dichroism spectroscopy in combination with density ...

The absolute configuration of the pentacyclic ichthyotoxin stypotriol, a constituent of Stypopodium zonale, was deduced to be 3S,5R,8R,9R,10S,13S,14S-(-) -1 by vibrational circular dichroism spectroscopy of the derived ...

1,3-Diols are frequently involved in biologically important compounds and, therefore, determination of the stereochemistry of these structural elements, in particular those in acyclic systems, has been one of the focuses ...

1,3-Diols are frequently involved in biologically important compounds and, therefore, determination of the stereochemistry of these structural elements, in particular those in acyclic systems, has been one of the focuses ...

The structural revision of natural (+)-diplopyrone (ND) was achieved by quantum NMR calculations. A DP4/J-DP4/DP4+ tandem suggested 3 as the most likely structure, but ECD calculations did not match the experimental values. ...

The absolute configuration of semisynthetic (-)-3α,6β- acetoxytropane 1, prepared from (-)-6β-hydroxyhyoscyamine 2, has been determined using vibrational circular dichroism (VCD) spectroscopy. The vibrational spectra (IR ...

The use of mandelate derivatives to determine the enantiomeric purity and the absolute configuration of isomeric mixtures of bicyclic and monocyclic secondary cyclohexenols was investigated. Synthesis, NMR and conformational ...

A secolignan, (-)-2-methyl-3-[bis(3 ',4 '-methylenedioxy-5 '-methoxyphenyl) methyl] butyrolactone (1), with a rare cis configuration was isolated from the aerial parts of Peperomia blanda (Piperaceae). The structure of ...