[EN] IMIDAZOPYRAZINONES, PYRAZOLOPYRIMIDINONES AND PYRAZOLOPYRIDINONES AS PDE1 INHIBITORS [FR] IMIDAZOPYRAZINONES, PYRAZOLOPYRIMIDINONES ET PYRAZOLOPYRIDINONES EN TANT QU'INHIBITEURS DE PDE1
[EN] IMIDAZOPYRAZINONES, PYRAZOLOPYRIMIDINONES AND PYRAZOLOPYRIDINONES AS PDE1 INHIBITORS [FR] IMIDAZOPYRAZINONES, PYRAZOLOPYRIMIDINONES ET PYRAZOLOPYRIDINONES EN TANT QU'INHIBITEURS DE PDE1
IBX facilitated the reaction of beta-enamino esters with allylic alcohols affording a direct, one-pot and metal free synthesis of functionalized pyridines including 2-substituted nicotinic acids, densely substituted pyridines and precursors of azafluorenones. The methodology also afforded the racemic pyridine core of cyclothiazomycin.