反应详情

A mixture of the product of Step B (0.7 g) and MnO2 (1.5 g) in dioxane (20 ml) was stirred for 6 h at reflux. The mixture was filtered through Celite pad and the filtrate was evaporated to dryness to give the title compound (0.51 g, 73.4%) as creamy solid. 1H-NMR (CDCl3) 1.4 (d, 6H, J=6 Hz); 1.76 (s, 6H); 2.07 (s, 3H); 2.11 (s, 6H); 4.7-4.78 (m, 1H); 7.32-7.42 (m, 3H); 9.91 (s, 1H).

1. temperatureat reflux
2. filtrationThe mixture was filtered through Celite pad
3. customthe filtrate was evaporated to dryness