Cyclobutanone → HCID 69053183, compound

Participants

Reaction Steps

To a solution of 3-acetyl-4-hydroxy-6-isopropyl-2-methylphenyl acetate (8.5 g) and cyclobutanone (2.6 g) in toluene (150 mL) was added pyrrolidine (1.2 g). The solution was left at room temperature for 16 hours, refluxed for two hours, and then a Dean-Stark was used to remove the water. Work up and chromatography (silica gel, hexane-ethyl acetate 2% to 5%) gave 4 g of 7-isopropyl-5-methyl-4-oxospiro[chroman-2,1′-cyclobutane]-6-yl acetate.

Provenance & Evidence