1,3-Dibromo-5,5-dimethylhydantoin → HCID 58529949, compound

Participants

Reaction Conditions

Reaction Steps

To a cooled (−20° C.) solution of tert-butyl 4-[4-(4-aminopyrrolo[2,1-f][1,2,4]triazin-7-yl)-1,3-thiazol-2-yl]piperidine-1-carboxylate (914 mg. 2.28 mmol) in DMF (12.6 mL) and AcOH (5 mL) was added 1,3-dibromo-5,5-dimethylhydantoin (326 mg, 1.14 mmol) in 3 portions over 10 minutes. The mixture was stirred at 0° C. for 3 h. The reaction was quenched with the addition 5% aqueous K2CO3 (50 mL) and was allowed to warm to rt. The mixture was extracted with ethyl acetate (3×50 mL). The combined organics were washed with brine, dried (Na2SO4) and evaporated. The crude material was purified by ISCO® chromatography using a gradient of 50% to 75% ethyl acetate in hexanes to afford 596 mg (54%) of the desired product. ES-MS m/z 480.85 [M+H]+, HPLC RT (min) 3.45.

Provenance & Evidence