Benzenesulfonyl chloride → 2-(3-Benzenesulfonyloxy-4-methoxy-benzoylamino)-indane-2-carboxylic acid

Participants

Reaction Steps

The compound of step 2 of example 15 (200 mg, 0.586 mmol) was dissolved in ACN (3 ml), potassium carbonate (243 mg, 1.7 mmol) and benzenesulfonyl chloride (155 mg, 0.88 mmol) were added, and the mixture was stirred for 30 min. The mixture was partitioned between EA and saturated sodium chloride solution, the aqueous phase extracted with EA, and the combined organic extracts were dried over magnesium sulfate, filtered, and evaporated to dryness. The residue was dissolved in dioxane (0.8 ml), lithium hydroxide (0.8 ml of a 1 N aqueous solution) was added, and the mixture was stirred at room temperature for 2.5 h. The mixture was partitioned between 2 N hydrochloric acid and EA, the aqueous phase extracted with EA, and the combined organic extracts were dried over magnesium sulfate, filtered and evaporated to dryness. The residue was purified by preparative RP HPLC (water/ACN gradient) to give 115 mg of the title compound.

Provenance & Evidence