反应详情

To a solution of 3-(α-acetonylbenzyl)-4-hydroxycoumarin (warfarin) (3.70 g, 12 mmol) in 120 ml anhydrous dioxane and 25 ml pyridine was added elaidic acid chloride (3.60 g, 12 mmol) and the reaction mixture was stirred at ambient temperature for 4 hours. The solvents were evaporated at high vacuum. The residue was partitioned between ether and water. The organic phase was washed with tartaric acid (aq), NaHCO3 (aq) and water. The dried organic phase was concentrated and the product purified on a column of slica gel with heptane/ethylacetate (6:1) as the eluent system. Impure fractions were repurified and homogenous fractions were evaporated to give 5.1 g (70%) of the title compound as a pale yellow oil.

1. customThe solvents were evaporated at high vacuum
2. customThe residue was partitioned between ether and water
3. washThe organic phase was washed with tartaric acid (aq), NaHCO3 (aq) and water
4. concentrationThe dried organic phase was concentrated
5. customthe product purified on a column of slica gel with heptane/ethylacetate (6:1) as the eluent system
6. customImpure fractions were repurified
7. customhomogenous fractions were evaporated