Potassium hydride → HCID 58107417, compound

Participants

Reaction Conditions

Reaction Steps

A dispersion of potassium hydride in oil (33.15 mmol) is washed with hexanes under argon then tetrahydrofuran (310 mL) is added at 0° C. and the resulting suspension is treated by dropwise addition of 6.77 g of 6-bromoindole in tetrahydrofuran (61 mL). The reaction mixture is stirred at 0° C. for 15 min to give a yellow solution. A solution of 44.2 mL of tert-butyllithium (1.5 M in pentane) is added slowly at −78° C. while maintaining the temperature below −75° C. to produce a yellow suspension. After 15 min a solution of 3.08 g of 4-chloro-N-methoxy-N-methyl-3-sulfamoyl-benzamide in tetrahydrofuran (61 mL) is added and the temperature is allowed to increase slowly to 0° C. The reaction mixture is quenched by addition of 62 mL of saturated aqueous ammonium chloride and extracted with ethyl ether. The organics were washed with water, dried over magnesium sulfate and concentrated to 9.65 g of a brown oil which is chromatographed on silica gel (1:1 hexanes/ethyl acetate) to give 2-chloro-5-(1H-indole-6-carbonyl)-benzenesulfonamide as a yellow foam. MS (m/z): 333 (M−1); Rf 0.37 (1:1 hexanes/ethyl acetate).

Provenance & Evidence