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Hydrolysis of 2′′,2′′′-[6′-(4-sulfamoylphenylamino)-1′,3′,5′-triazine-2′,4′-diyl]-bis(azanediyl)diacetate intermediate 2 to product 3. Reagents and conditions: a mixture of 2′′,2′′′-[6′-(4-sulfamoylphenylamino)-1′,3′,5′-triazine-2′,4′-diyl]-bis(azanediyl)diacetate 2, MeOH, LiOH, and H2O was stirred at r.t. for 3 h. Product yield: 64%.
