Hydrochloric Acid → HCID 68286089, compound

Participants

Reaction Conditions

Reaction Steps

Ethyl 5-(4-chlorophenyl)-4-(dimethylamino)-3-(4-sulfamoylphenyl)thiophene-2-carboxylate (compound 34e, 2.00 g, 4.30 mmol) was suspended in ethanol (30 ml) and solution of NaOH (0.86 g, 21.5 mmol) in water (4 ml) was added to it at 25° C. The reaction mixture was then heated at 75° C. under stirring for 2 hr. The progress of the reaction was monitored by TLC. The reaction mixture was then concentrated under reduced pressure. The residue so obtained was diluted with water (10 ml) and cooled using ice bath. To the cooled mixture was added aqueous 10% HCl to bring the pH od the solution to about 6. The mixture so obtained was extracted with ethyl acetate (3×30 ml). The combined organic layer was then dried over anhydrous Na2SO4. The solvent was evaporated from the dried organic layer under reduced pressure to obtain the title compound (1.60 g, 85.1%)

Provenance & Evidence