Sodium hydride → HCID 18960404, compound

Participants

Reaction Steps

A solution of 5.0 g (0.020 mol) of N-(1,1-dimethylethyl)-1H-indole-3-sulfonamide in 30 mL anhydrous DMF was cooled to 10° C. under nitrogen atmosphere and was treated slowly with 0.87 g (0.022 mol) 60% sodium hydride (oil dispersion). The mixture was stirred for 20 minutes at room temperature then recooled to 10° C., whereupon 5.0 g (0.024 mol) of 2-(2'-bromoethoxy)tetrahydropyran (J. Org. Chem., Vol. 50, p. 4243, 1985) was added followed by heating to 70° C. for 3 hours. After cooling in an ice bath, 20 mL of saturated NH4Cl solution plus 20 mL of water was added and the mixture was extracted twice with ethyl acetate. The organic extract was washed twice with dilute HCl solution, then brine followed by drying (MgSO4) and evaporation in vacuo. The residue was triturated and collected by filtration with n-butyl chloride to afford 6.61 g of the title compound, m.p. 125°-132° C.

Provenance & Evidence