Diethyl Ether → (7R)-7-amino-4-chloro-9-(2,2,2-trifluoroethyl)-6,7,9,10-tetrahydroazepino[3,4-e]indazol-8(3H)-one

Beteiligte Stoffe

Reaktionsschritte

(R)-Benzyl 4-chloro-8-oxo-9-(2,2,2-trifluoroethyl)-3,6,7,8,9,10-hexahydroazepino[3,4-e]indazol-7-ylcarbamate (450 mg, 964 μmol) was dissolved in dichloromethane (20 ml). Anisole (250 μl, 2300 μmol) was added to the mixture followed by methanesulfonic acid (5.0 ml, 77051 μmol). Reaction stirred at room temperature for 1.5 hours. 100 mL of diethyl ether was added to the mixture. Reaction stirred at room temperature for 45 minutes. Liquids were decanted off. Remaining solid was washed with diethyl ether and the liquids decanted. Solids were dissolved in water. Mixture was made basic with aqueous sodium bicarbonate. Mixture was extracted twice with ethyl acetate and the aqueous phase was discarded. Material was washed successively with aqueous sodium bicarbonate, water and brine and the aqueous phases were discarded. Organics were dried MgSO4, filtered and then concentrated to dryness. Title compound was obtained as light yellow solid in 78% yield. MS (M+H)+=321.2.

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