Chlorotriethylsilane → (+/-)-4-[(4-chlorophenyl)(1,2-dihydro-1-methyl-2-oxo-4-phenyl-6-quinolinyl)hydroxymethyl]-N,N-dimethyl-2-(triethylsilyl)-1H-imidazole-1-sulfonamide

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Reaction Conditions

Reaction Steps

Butyllithium (30.1 ml) was added slowly at -78° C. to a solution of N,N-dimethyl-1H-imidazol-1-sulfonamide (8.4 g) in tetrahydrofuran (150 ml) and the mixture was stirred at -78° C. for 15 minutes. Chlorotriethylsilane (8.1 ml) was added and the mixture was stirred till the temperature reached 20° C. The mixture was cooled till -78° C., butyllithium (30.1 ml) was added, the mixture was stirred at -78° C. for 1 hour and allowed to reach -15° C. The mixture was cooled again till -78° C., a solution of 6-(4-chlorobenzoyl)-1-methyl-4-phenyl-2(1H)-quinolinone (15 g) in tetrahydrofuran (30 ml) was added and the mixture was stirred till the temperature reached 20° C. The mixture was hydrolized and extracted with ethyl acetate. The organic layer was dried (MgSO4), filtered off and evaporated till dryness. The product was used without further purification, yielding 26 g (100%) of (±)-4-[(4-chlorophenyl)(1,2-dihydro-1-methyl-2-oxo-4-phenyl-6-quinolinyl)hydroxymethyl]-N,N-dimethyl-2-(triethylsilyl)-1H-imidazole-1-sulfonamide (interm. 3-a).

Provenance & Evidence