Sodium Hydroxide → HCID 58997406, compound

Participants

Reaction Steps

A solution of sodium hydroxide (105.4 mg, 2.64 mmol) in water (2.54 g) is added to a solution of the Example 37 title compound, 3-(1,1,4-Trioxo-1,2,5-thiadiazolidin-2-yl)-benzoic acid methyl ester (37.1 mg, 0.137 mmol) in MeOH (5.48 mL). This is allowed to stir 13 h and then neutralized by addition of 1N aqueous HCl (2.64 mL). The reaction mixture is loaded onto a preparative reverse phase HPLC column (YMC CombiPrep Pro C18, 50×20 mm I.D., particle size S-5 micron, 12 nM) in two equal aliquots and eluted at 30 mL/min with a gradient of 100:0 (water containing 0.1% TFA: MeCN) for 0 min to 2.5 min, then to 10:90 at 5.5 min. Then held at 10:90 until 7 min. Fractions containing the product are combined and concentrated on a Savant Speedvac to yield 3-(1,1,4-trioxo-1,2,5-thiadiazolidin-2-yl)-benzoic acid as a white powder: API-Ms [M−H]=255.09.

Provenance & Evidence