Procedure for the preparation of (4S) - 4 - (cyano - 2-methoxyphenyl) - 5 - ethoxy - 2.8 - dimethyl - 1,4 - dihydro - 1.6 - naftiridina - 3 - carboxamide and purification for use as pharmaceutical Active principle
The present Invention refers to a new and improved process for the preparation of (4S) - 4 - (cyano - 2-methoxyphenyl) - 5 - ethoxy - 2.8 - dimethyl - 1,4 - dihydro - 1.6 - naftiridina - 3 - carboxamide of formula (i)La presente invención se refiere a un procedimiento nuevo y mejorado para la preparación de (4S)-4- (4-ciano-2-metoxifenilo)-5-etoxi-2,8-dimetilo-1,4-dihidro-1,6-naftiridina-3-carboxamida de la fórmula (I)
