Hydrochloric Acid → 3-(5-Bromo-2-methylphenyl)-4-hydroxy-8-methoxy-8-(trifluoromethyl)-1-azaspiro[4.5]dec-3-en-2-one

Participants

Reaction Conditions

Reaction Steps

2.26 g (20.16 mmol) of potassium tert-butoxide were added to 4.70 g (10.08 mmol) of methyl 1-{[(5-bromo-2-methylphenyl)acetyl]amino}-4-methoxy-4-(trifluoromethyl)cyclohexanecarboxylate (Example 36A) in 50 ml of N,N-dimethylformamide. The reaction mixture was stirred at 80° C. for 60 minutes. For work-up, the cold reaction mixture was poured into 800 ml of ice-water and acidified with aqueous hydrochloric acid. The crude product was filtered off and dried. This gave 3.68 g (84% of theory) of the title compound as a beige powder.

Provenance & Evidence