PARABANIC ACID

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Compound 158 (47 mg, 0.1 mmol) and parabanic acid (16 mg, 0.14 mmol) were treated as described in the preparation of compound 219. Purification was done by flash chromatography (CH2Cl2/ethyl acetate 4:1) to provide the title compound, which was impure. The product was further purified by preparative TLC (CH2Cl2/ethyl acetate 20:1) to furnish the title compound as yellow oil. Purification