Cl[C:2]1[N:7]=[C:6]([C:8]2[CH:13]=[CH:12][N:11]=[CH:10][CH:9]=2)[N:5]=[C:4]([NH:14][S:15]([CH2:18][CH2:19][C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)(=[O:17])=[O:16])[C:3]=1[C:26]1[CH:31]=[CH:30][C:29]([CH3:32])=[CH:28][CH:27]=1.C(O)(=O)C[C:35](CC(O)=O)([C:37](O)=[O:38])[OH:36]>C(O)CO.O>[OH:36][CH2:35][CH2:37][O:38][C:2]1[N:7]=[C:6]([C:8]2[CH:13]=[CH:12][N:11]=[CH:10][CH:9]=2)[N:5]=[C:4]([NH:14][S:15]([CH2:18][CH2:19][C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)(=[O:17])=[O:16])[C:3]=1[C:26]1[CH:31]=[CH:30][C:29]([CH3:32])=[CH:28][CH:27]=12-Phenyl-ethanesulfonic acid (6-chloro-2-pyridin-4-yl-5-p-tolyl-pyrimidin-4-yl)-amide (480 mg) was added to a solution of K-tert. butylate (580 mg) in ethylene glycol (5 ml). The mixture was stirred at 11° C. for 72 h before it was diluted with water (100 ml), acidified with 10% aq. citric acid (13 ml). The resulting precipitate was collected, washed with water and diethyl ether and dried to give 2-phenyl-ethanesulfonic acid [6-(2-hydroxy-ethoxy)-2-pyridin-4-yl-5-p-tolyl-pyrimidin-4-yl]-amide as a beige powder. LC-MS: tR=4.17 min, [M+1]+=491.24, [M−1]−=489.08.
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