[Br:1][C:2]1[C:3]([NH:24][C@H:25]([CH3:30])[C:26]([OH:29])([CH3:28])[CH3:27])=[N:4][C:5]([NH:8][C:9]2[CH:14]=[CH:13][C:12]([S:15]([CH3:23])(=[N:17]C(OCC)=O)=[O:16])=[CH:11][CH:10]=2)=[N:6][CH:7]=1.CC[O-].[Na+].[Na+].[Cl-]>C(O)C>[Br:1][C:2]1[C:3]([NH:24][C@H:25]([CH3:30])[C:26]([OH:29])([CH3:27])[CH3:28])=[N:4][C:5]([NH:8][C:9]2[CH:14]=[CH:13][C:12]([S:15]([CH3:23])(=[NH:17])=[O:16])=[CH:11][CH:10]=2)=[N:6][CH:7]=11.65 g (3.30 mmol) of (RS)-S-[4-({5-bromo-4-[(R)-(2-hydroxy-1,2-dimethylpropyl)amino]pyrimidin-2-yl}amino)phenyl]-N-(ethoxycarbonyl)-S-methyl sulfoximide in 6.5 ml of ethanol is mixed with 19.1 ml (6.69 mmol) of a 0.35 molar solution of NaOEt in ethanol and stirred under reflux for 5 hours. The batch is stirred overnight at room temperature and then added to a saturated NaCl solution. It is extracted with ethyl acetate, and the combined organic phases are dried (Na2SO4), filtered and concentrated by evaporation. The remaining residue is purified by chromatography (DCM/EtOH 9:1). 0.95 g (2.22 mmol, corresponding to 67% of theory) of the product is obtained.
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