反应详情

To a solution of the compound (98 mg, 0.28 mmol) prepared in Example 14 in DMF (4 mL) at −40° C. was added 1,3-dibromo-5,5-dimethylimidazolidine-2,4-dione (40 mg, 0.14 mmol) portion wise over a period of 1 minute. The reaction was stirred for 30 minutes and was allowed to warm to room temperature, and stirred overnight. DMF was removed, and the crude solid was extracted with sodium hydroxide (1N) and DCM. The organic layer was dried, concentrated to obtain the title compound (97 mg) having the following physical data.

1. stirringstirred overnight
2. customDMF was removed
3. extractionthe crude solid was extracted with sodium hydroxide (1N) and DCM
4. customThe organic layer was dried
5. concentrationconcentrated