Hydrochloric Acid → 3-(5-Bromo-2-methylphenyl)-4-hydroxy-1-azaspiro[4.5]dec-3-en-2-one

Participants

Reaction Conditions

Reaction Steps

1.71 g (15.2 mmol) of potassium tert-butoxide were added to 2.80 g (7.60 mmol) of the compound from Example 12A in 15 ml of N,N-dimethylformamide. The reaction mixture was heated at 80° C. for 15 minutes. After cooling, water was added and aqueous hydrogen chloride solution was added dropwise. The precipitate was filtered off with suction, washed with water and dried. This gave 2.33 g (90% of theory) of the title compound.

Provenance & Evidence