反应详情

To an ice bath cooled solution of 9.76 g (0.116 mole) of 2-ethylacrolein in 40 mL of dry THF was added 24.6 g (0.116 mole) of 2-mercaptobenzophenone in 40 mL of THF followed by 13 g (0.128 mole) of triethylanine. The reaction mixture was stirred at room temperature for 3 days, diluted with ether, and was washed successively with dilute HCl, brine, and 1 M potassium carbonate. The ether layer was dried over MgSO4 and concentrated in vacuo. The residue was purified by HPLC (10% EtOAc-hexane) to give 22 g (64%) of 11 in the second fraction. An attempt to further purifiy this material by kugelronr distillation at 0.5 torr (160-190° C.) gave a fraction (12.2 g) which contained starting material indicating a reversed reaction during distillation. This material was dissolved in ether (100 mL) and was washed with 50 mL of 1 M potassium carbonate three times to give 6.0 g of a syrup which was purified by HPLC (10% EtOAc-hexane) to give 5.6 g of pure 11.

1. washwas washed successively with dilute HCl, brine, and 1 M potassium carbonate
2. dry with materialThe ether layer was dried over MgSO4
3. concentrationconcentrated in vacuo
4. customThe residue was purified by HPLC (10% EtOAc-hexane)