反应详情

To a solution of 3-butenylmagnesium bromide in THF (0.50 M, 200 mL) at 0° C. was added o-anisaldehyde (13.62 g, 100 mmol) in THF (20 mL) dropwise and the reaction mixture was heated under reflux for 1 hour. Water was added, the aqueous layer was extracted with ether (x4), and the combined organic layers were washed with brine, dried over MgSO4 and evaporated in vacuo to give the title compound. The crude product was used for Preparation 17 without purification. 1H NMR (CDCl3, 400 MHz) δ: 7.3 (2H), 6.9 (2H), 5.8 (2H), 4.8-5.1 (3H), 3.85 (3H, OMe), 2.5 (1 H), 1.8-2.3 (4H).

1. temperaturethe reaction mixture was heated
2. temperatureunder reflux for 1 hour
3. extractionthe aqueous layer was extracted with ether (x4)
4. washthe combined organic layers were washed with brine
5. dry with materialdried over MgSO4
6. customevaporated in vacuo