Supplementary Materialsmolecules-22-01925-s001. on silica gel (petroleum ether:ethyl acetate = 4:1) to give 7 (0.39 g, 62.9%) as a white solid. (13a). Intermediate 7 (0.20 g, 1 mmol) was dissolved in acetonitrile (10 mL), and phosphorus oxychloride (0.17 mL, 1.9 mmol) was added in a slow stream. The perfect solution is was heated at reflux for… Continue reading Supplementary Materialsmolecules-22-01925-s001. on silica gel (petroleum ether:ethyl acetate = 4:1) to