反应详情

温度

150 °C

4-(4-Amino-5-isopropoxy-2-methyl-phenyl)-piperidine-1-carboxylic acid tert-butyl ester (170 mg, 0.488 mmol) from the previous step, (2,5-Dichloro-pyrimidin-4-yl)-[2-(propane-2-sulfonyl)-phenyl]-amine (Intermediate 2, 169 mg, 0.488 mmol, 1 equiv.), xantphos (28 mg, 0.049 mmol, 0.1 equiv.), palladium acetate (5.5 mg, 0.024 mmol, 0.05 equiv.), and Cs2CO3 (477 mg, 1.46 mmol, 3 equiv.) are dissolved in anhydrous THF (6 mL). N2 is bubbled through the reaction mixture for 5 minutes and then the reaction vessel is sealed and heated with microwave irradiation to 150° C. for 20 min. The reaction is filtered and the filtrate concentrated under vacuum. After concentration, the crude product is purified by silica gel chromatography (gradient from hexanes to 30% ethyl acetate in hexanes) to give 4-(4-{5-chloro-4-[2-(propane-2-sulfonyl)-phenylamino]-pyrimidin-2-ylamino}-5-isopropoxy-2-methyl-phenyl)-piperidine-1-carboxylic acid tert-butyl ester as a yellow film: ESMS m/z 658.3 (M+H+). This product (105 mg, 0.160 mmol) is dissolved in CH2Cl2 (3 mL) and treated with TFA (3 mL). After 45 min., the reaction is concentrated under vacuum. 1 N HCl in Et2O (5 mL×2) is added causing the product HCl salt to precipitate. The solvent is removed by decantation. The resulting 5-Chloro-N2-(2-isopropoxy-5-methyl-4-piperidin-4-yl-phenyl)-N4-[2-(propane-2-sulfonyl)-phenyl]-pyrimidine-2,4-diamine (66) is dried under high vacuum, generating an off-white powder: 1H NMR (400 MHz, DMSO-d6+trace D2O) δ 8.32 (s, 1H), 8.27 (d, 1H), 7.88 (d, 1H), 7.67 (dd, 1H), 7.45 (dd, 1H), 7.42 (s, 1H), 6.79 (s, 1H), 4.56-4.48 (m, 1H), 3.49-3.32 (m, 3H), 3.10-2.91 (m, 3H), 2.09 (s, 3H), 1.89-1.77 (m, 4H), 1.22 (d, 6H), 1.13 (d, 6H); ESMS m/z 558.1 (M+H+).

1. customN2 is bubbled through the reaction mixture for 5 minutes
2. customthe reaction vessel is sealed
3. filtrationThe reaction is filtered
4. concentrationthe filtrate concentrated under vacuum
5. concentrationAfter concentration
6. customthe crude product is purified by silica gel chromatography (gradient from hexanes to 30% ethyl acetate in hexanes)