abstract |
The invention relates to a novel process for the preparation of spiro derivatives, especially 7-methyl-2- [4-methyl-6- [4- (trifluoromethyl) phenyl] pyrimidin-2-yl] -1,7-diazaspiro [ 4.4] nonan-6-one, as well as new intermediates used in said process with methods for preparing said intermediates. |