5-Methoxy[1,3]thiazolo[5,4-b]pyridin-2-amine → 3-cyclopentyl-2-(4-methanesulfonyl-phenyl)-N-(5-methoxy-thiazolo[5,4-b]pyridin-2-yl)-propionamide

関与物質

反応手順

To a solution of the title A compound, 5-methoxy-thiazolo[5,4-b]pyridin-2-ylamine (1.22 mmol, 222 mg) in 3 mL of pyridine at 0° C. is added 3-cyclopentyl-2-(4-methansulfonyl-phenyl)-propionyl chloride (1.02 mmol, prepared as described for the preparation of the title C compound in Example 1). The reaction is allowed to warm to RT over 12 h, then evaporated and the residue is partitioned between MTBE and aqueous 0.1 N HCl. The organic solution is washed with water, saturated aqueous NaHCO3 and brine, dried and evaporated to an oil. Chromatography over silica affords 3-cyclopentyl-2-(4-methanesulfonyl-phenyl)-N-(5-methoxy-thiazolo[5,4-b]pyridin-2-yl)-propionamide; 1H NMR δ 9.7 (s, 1H), 7.85 (m, 3H), 7.38 (d, J=8, 2H), 6.83 (d, J=8, 1H), 4.05 (s, 3H), 3.63 (t, J=7.5, 1H); 3.09 (s, 3H), 2.2 (m, 1H), 1.1-1.9 (m, 10H); e/z (ES) 460 (M+1, 100%).

情報源と証拠