反应详情

Ethylmagnesium bromide (7.7 mmol, 3 M in ethyl ether) was added to a solution of quinoline-6-carbonitrile (0-4) (540 mg, 3.5 mmol) and Ti(Oi-Pr)4 (3.9 mmol, 1.16 mL) in Et2O (15 mL) at −70° C. The resulting yellow solution was stirred for 10 mins, warmed to room temperature over 1.5 h, and then was treated with BF3.OEt2 (7 mmol, 0.88 mL). The resulting mixture was stirred for 1 h. Then 1N aqueous HCl (11 mL) and ethyl ether (40 mL) were added, followed by NaOH (10% aq, 30 mL). The mixture was extracted with ethyl ether. The combined ethyl ether layers were dried over anhydrous Na2SO4, filtered, and concentrated in vacuo to afford the crude title compound, which was used for the next step without further purification. MS (m/z): 185 (M+1)+.

1. stirringThe resulting mixture was stirred for 1 h
2. extractionThe mixture was extracted with ethyl ether
3. dry with materialThe combined ethyl ether layers were dried over anhydrous Na2SO4
4. filtrationfiltered
5. concentrationconcentrated in vacuo