Water → HCID 69056802, compound

Participants

Reaction Steps

A mixture of 3-acetyl-6-ethyl4-hydroxy-2-methylphenyl acetate (5.18 g), cyclobutanone (4.5 g) and pyrrolidine (1.5 mL) in toluene (50 mL) was stirred at refluxing temperature with a Dean Stark. After 8 hours it was poured into water and the toluene was separated, dried, and evaporated. The residue was dissolved in MeOH (50 mL) with LiOH (2 g), stirred at room temperature for 3 hours, poured into water, and extracted with ethyl acetate. The ethyl acetate was washed, dried, and evaporated. The residue was purified by silica gel column eluting with 15% ethyl acetate in hexane, giving 7-ethyl-6-hydroxy-5-methylspiro[chroman-2,1′-cyclobutan]-4-one as a light brown oil (0.82 g).

Provenance & Evidence