Acetic Anhydride → HCID 54487648, compound

Participants

Reaction Steps

Racemic 2,7,8-Trimethyl-2-(β-carboxyethyl)-6-hydroxy chroman (500 mg) (see Example 11) was dissolved in pyridine (20 mL) at room temperature, and acetic anhydride (10 mL) was added. The solution was maintained at room temperature for 5 hours, solvent was removed under vacuum, methanol (4×10 mL) was added and then removed under reduced pressure. The residual oil was dissolved in ethyl acetate (150 mL) and the organic phase was washed with water (50 mL), aqueous HCl (1 N, 50 mL) and water (50 mL), then dried over sodium sulfate. Solvent was then removed, and the residual oily material was purified on a silica gel column with hexane/ethyl acetate (1:1). The desired product crystallized from acetone/hexane, m.p. 105-107° C.

Provenance & Evidence