Cesium carbonate → 2-({5-Chloro-2-[(1,5-dimethyl-1H-pyrazol-4-yl)amino]-4-pyridinyl}amino)-N-(methyloxy)benzamide

関与物質

反応条件

反応手順

A microwave tube was charged with 2-[(2,5-dichloro-4-pyridinyl)amino]-N-(methyloxy)benzamide (200 mg, 0.64 mmol), 1,5-dimethyl-1H-pyrazol-4-amine (142 mg, 1.28 mmol), cesium carbonate (626 mg, 1.92 mmol) and dioxane/THF (3:1 ml). The reaction mixture was degassed under nitrogen for 10 min and palladium (II) acetate (5.8 mg, 0.03 mmol) and BINAP (40 mg, 0.06 mmol) were added. The tube was sealed and the mixture was stirred in an oil bath at 150° C. overnight. The dark brown solution was filtered thru celite and evaporated. It was dissolved in MeOH and filtered thru an Acrodisc (Pall Corporation; www.pall.com) and further purified on preparative Agilent HPLC (5 to 95% water:acetonitrile with 0.1% formic acid). The dark brown oil residue was dissolved in DMF and water was slowly added. A tan precipitate crashed out and was filtered off and dried under vacuum at 40° C. for 2 hrs to afford the desired product (18 mg, 7.3%) as a tan solid. LC-MS [M+H]+=387.1, 389.1. 1H NMR (400 MHz, DMSO-d6) δ ppm 11.91 (br. s., 1 H) 9.41 (br. s., 1 H) 7.85-7.98 (m, 2 H) 7.49-7.59 (m, 3 H) 7.42 (br. s., 1 H) 7.07-7.13 (m, 1 H) 6.50 (br. s., 1 H) 3.69 (d, J=10.36 Hz, 6 H) 2.11 (s, 3 H).

情報源と証拠