The effect of polar substituents on the conformation and stereochemistry of enolate radicals
ESR measurements and AM1 calculations show that ester substituted radicals 2 and 6 prefer conformation A as a result of allylic strain effects. But dipolar repulsion between substituents X and CO2Et In 2 and 6 has a pronounced effect on the con
Synthetic studies on fully substituted γ-pyrone-containing natural products: The absolute configurations of Ilikonapyrone and peroniatriols I and II
Mild cyclization method [DMSO - (COCl)2 or Ph3P - CCl4] of triketides bearing optically active functional groups to the corresponding γ-pyrones provided determination of the absolute configurations of ilikonapyrone and per