Trifluoroacetic acid → 4-(1,1,4-Trioxo-1,2,5-thiadiazolidin-2-ylmethyl)-benzoic acid 2-ethyl-butyl ester

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Reaction Steps

A solution of the title C compound, 4-[5-(2,4-dimethoxy-benzyl)-1,1,4-trioxo-1,2,5-thiadiazolidin-2-ylmethyl]-benzoic acid 2-ethyl-butyl ester (230 mg, 0.456 mmol) and 2 mL of TFA in 6 mL of CH2Cl2 is stirred at RT overnight. The solvent is evaporated and the residue is treated with MeCN and filtered. The filtrate is concentrated and the residue is treated with Et2O, filtered and the Et2O is evaporated to give 4-(1,1,4-trioxo-1,2,5-thiadiazolidin-2-ylmethyl)-benzoic acid 2-ethyl-butyl ester as a light pink colored solid: [M−H]−=353.

Provenance & Evidence