RESUMEN

Simple three-step asymmetric and racemic syntheses of GlaxoSmithKline's highly potent PDE IVb inhibitor 1 were developed. The suggested approach is based on reductive domino transformations of 3-ß-carbomethoxyethyl-substituted six-membered cyclic nitronates, which are easily accessed by a stereoselective [4 + 2] cycloaddition of an appropriate nitroalkene to vinyl ethers. In vitro studies of PDE IVb inhibition by enantiomeric pyrrolizidinones (+)-1 and (-)-1 were performed.

Asunto(s)

Inhibidores de Fosfodiesterasa 4/química , Inhibidores de Fosfodiesterasa 4/síntesis química , Pirroles/química , Pirroles/síntesis química , Pirrolidinonas/química , Ciclización , Estructura Molecular , Pirrolidinonas/farmacología