反应详情

A solution of compound 3B (50 mg, 0.16 mmol) and 3-methoxy-1-(2-methoxy-ethyl)propylamine (140 mg, 0.96 mmol) in 1 ml DCE was heated to 85° C. for 72 hours. The reaction mixture was chromographed directly on a Supelco™ 2 g/12 ml silica column with gradient solvent of CH2Cl2 to a final solvent mixture of CH2Cl2:MeOH:acetone (94:3:3). Two additional chromatographies were required to provide 24 mg of 6-Ethoxy-2[3-methoxy-1(2-methoxyethyl)propylamino]-8,8a-dihydro-4aH-pyrido[2,3-d]pyrimidin-7-one (Example 1) at 86% purity as judged by MS/HPLC. M++337.