A mixture of [6-(2-methoxy-phenyl)-pyrimidin-4-yl]-carbamic acid ethyl ester (XL) (0.30 g, 1.1 mmol), 4-amino-piperidine-1-carboxylic acid tert-butyl ester (0.23 g, 1.1 mmol) and toluene (4 ml) was subjected to microwave conditions at 120° C. and 100 psi pressure for 10 minutes. The reaction was monitored by TLC. After completion of the reaction, water was added and the mixture was extracted with ethyl acetate. The organic layer was separated, dried over anhydrous sodium sulfate and concentrated to provide 0.250 g of 4-{3-[6-(2-methoxy-phenyl)-pyrimidin-4-yl]-ureido}-piperidine-1-carboxylic acid tert-butyl ester (XLIV).
