Diisopropylethylamine → 3-(7-(3,4-dimethoxyphenylamino)thiazolo[5,4-d]pyrimidin-5-yl)-N-(4-(methylcarbamoyl)phenyl)benzamide

Participants

Reaction Steps

A solution of 3-[7-(3,4-dimethoxy-phenylamino)-thiazolo[5,4-d]pyrimidin-5-yl]-benzoic acid (170 mg, 0.41 mmol) in 10 mL of DMF were added 4-amino-N-methyl-benzamide (81 mg, 0.54 mmol), HATU (205 mg, 0.54 mmol) and DIEA (79 mg, 0.61 mmol) at room temperature. Then the reaction mixture was stirred at room temperature for 16 hours. The solvent was evaporated to give a solid as a crude product. It was purified by preparative HPLC (Gemini 5u C18 150×21.2 mm; inject volume: 3 ml/inj, flow rate: 20 ml/min; wavelength: 214 nm and 254 nm; the gradient conditions are: 40% acetonitrile/60% water (0.1% TFA V/V) initially, and then proceed to 70% acetonitrile/30% water (0.1% TFA V/V) in a linear fashion after just 9 min.) to give 3-(7-(3,4-dimethoxyphenylamino)thiazolo[5,4-d]pyrimidin-5-yl)-N-(4-(methylcarbamoyl)phenyl)benzamide (66 mg, 29.7%) as a yellow solid. 1H NMR (300 MHz, DMSO): δ 10.66 (s, 1H), 10.21 (s, 1H), 9.39 (s, 1H), 8.93 (s, 1H), 8.59 (d, 1H, J=7.2 Hz), 8.38-8.37 (m, 1H), 8.05 (d, 1H, J=8.7 Hz), 7.89-7.82 (m, 6H), 7.71-7.68 (m, 12H), 7.54-7.50 (m, 1H), 6.97 (d, 1H, J=8.7 Hz), 3.78 (s, 3H), 3.72 (s, 3H), 2.78 (d, 1H, J=3.9 Hz). LC-MS: 541.1 [M+H]+, tR=1.72 min. HPLC: 96.60% at 214 nm, 97.75% at 254 nm, tR=6.68 min.

Provenance & Evidence