A mixture of methanesulfonic acid 3-(4-{[(2-cyano-pyrimidin-4-yl)-(2,2-dimethyl-propyl)-amino]-methyl}-phenyl)-propyl ester and methanesulfonic acid 2-(4-{[(2-cyano-pyrimidin-4-yl)-(2,2-dimethyl-propyl)-amino]-methyl}-phenyl)-propyl ester (in ratio of 3:1) (130 mg, 0.31 mmoles) is dissolved in 3 ml of DMF and 1-piperizine (0.06 ml, 0.64 mmoles) is added at rt. The mixture is stirred at rt for overnight. Water is added and the organic layer is extracted with AcOEt, dried over magnesum sulfate and concentrated. The crude product is purified by silica gel column chromatography to give 56 mg of desired 4-{(2,2-dimethyl-propyl)-[4-(3-piperidin-1-yl-propyl)-benzyl]-amino}-pyrimidine-2-carbonitrile (A) in 56% yield and 24 mg of desired methanesulfonic acid 2-(4-{[(2-cyano-pyrimidin-4-yl)-(2,2-dimethyl-propyl)-amino]-methyl}-phenyl)-propyl ester (B) in 18% yield.
