First Representatives of Phosphorylated Flavanones
The natural flavanoid dihydroquercetin was for the first time regioselectively phosphorylated using phosphoramidites. The resulting compounds were isolated in a homogeneous state as phosphorothioates, and their structure was confirmed by 1H, 13C, and 31P NMR spectroscopy.
Abstract Palmatol ( 3 ) is a diterpenoid exhibiting an unprecedented prenylbicyclogermacrane skeleton. The structure and the relative stereochemistry, mainly suggested by an extensive NMR study, were supported by some simple chemical transformations.