反应详情

To a mixture of 2-(2,2-dimethyl-1,3-dioxolan-4-yl)-7,8-dihydroquinolin-5(6H)-one (0.182 g, 0.736 mmol) and morpholine (0.321 mL, 3.68 mmol) in toluene (3 mL) at 0° C. was added titanium(IV) chloride (1.0 M in toluene) (0.405 mL, 0.405 mmol) dropwise. The ice-bath was removed, and the orange, heterogeneous reaction mixture was stirred at room temperature overnight. The reaction mixture was filtered through a pad of CELITE®, which was then rinsed with toluene (3×10 mL). The pale yellow filtrate was concentrated under reduced pressure to give 4-(2-(2,2-dimethyl-1,3-dioxolan-4-yl)-7,8-dihydroquinolin-5-yl)morpholine (0.194 g, 0.613 mmol, 83% yield) as a yellow oil.

1. customThe ice-bath was removed
2. filtrationThe reaction mixture was filtered through a pad of CELITE®, which
3. washwas then rinsed with toluene (3×10 mL)
4. concentrationThe pale yellow filtrate was concentrated under reduced pressure