反应详情

Hydrochloric acid (35 wt %, 892 μl) was added to 2,3-diamino-4-(2-thienyl)-6-ethoxycarbonylaminopyridine (1.28 g, 4.61 mmol) and orthoformic acid ethyl ester (24.6 ml), followed by stirring at room temperature for 3 days. This solution was filtered and the product was washed with ether to give 7-(2-thienyl)-5-ethoxycarbonylamino-3H-imidazo[4,5-b]pyridine (1.36 g, yield 91%).

1. filtrationThis solution was filtered
2. washthe product was washed with ether