反应详情

温度

70 °C

1-(tert-butyldimethylsilyloxy)propan-2-one (188 mg, 1.0 mmol) and Ti(OEt)4 (0.52 mL, 2.5 mmol) were dissolved in THF (5 mL). Then 2-methylpropane-2-sulfinamide (121 mg, 1.0 mmol) was added to the mixture under nitrogen atmosphere. The mixture was heated to 70° C. for 2 h. The mixture was poured into brine and filtered through a plug of Celite. The organic layer was concentrated and purified by silica gel chromatography using PE/EA (5/1) to give product the title compound (190 mg, 65%). EDI-MS (M+1): 292. 1H NMR (300 MHz, CDCl3) δ 4.152 (s, 2H), 2.248 (s, 3H), 1.156 (s, 9H), 0.839 (s, 9H), 0.001 (s, 6H).

1. filtrationfiltered through a plug of Celite
2. concentrationThe organic layer was concentrated
3. custompurified by silica gel chromatography