反应详情

4-(4-pyrimidin-2-yl-phenyl)-3,6-dihydro-2H-pyridine-1-carboxylic acid tert-butyl ester (crude from step 3) was dissolved in dichloromethane (200 ml) and trifluoroacetic acid (22 ml, 0.29 mol) was added at r.t. The mixture was stirred at r.t. for 5 hr and solvents were removed in vacuum. Diethyl ether was added and off-white solid was formed. The solid was filtered and washed with diethyl ether to give a salt (14.4 g, 71%).

1. customsolvents were removed in vacuum
2. additionDiethyl ether was added
3. customoff-white solid was formed
4. filtrationThe solid was filtered
5. washwashed with diethyl ether