Sodium Chloride → tert-Butyl 2-(3,4-dichloro-N-methylphenylsulfonamido)-4,5,6,7-tetrahydrobenzo-[b]thiophene-3-carboxylate

Participants

Reaction Conditions

Reaction Steps

tert-Butyl 2-(3,4-dichlorophenylsulfonamido)-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate (21.64 g, 46.8 mmol) was dissolved in acetone (200 ml), and K2CO3 (12.9 g, 93.6 mmol) was added thereto. Methyl iodide (5.83 ml, 93.6 mmol) was then added, and the suspension was heated overnight at 40° C. After cooling to room temperature, water and saturated NaCl solution were added and the product was extracted with ethyl acetate. The organic phase was dried (sodium sulfate) and the product was purified by crystallization from methanol.

Provenance & Evidence