N-bromobutanimide → HCID 57816840, compound

Participants

Reaction Steps

To a solution of the phosphonate prepared in step 2 (300 mg, 0.59 mmol) in CH3CN (5 ml) was added NBS (157 mg, 0.88 mmol) at room temperature. The reaction mixture was stirred at room temperature for 1 h. The solvent was removed and the residue was washed with sat. aq Na2SO3 solution. The aqueous phase was extracted again with DCM. The organic layer was dried over Na2SO4, filtered, concentrated, and purified by prep HPLC on a C18 column, eluting with a gradient of 5-95% CH3CN in H2O as solvent. 1H NMR (CDCl3) δ 1.19-1.27 (m, 6H), δ 3.40 (s, 3H), δ 3.68 (t, 2H), δ 3.84-3.3.88 (m, 1H), δ 3.93-4.10 (m, 8H), δ 4.30-4.36 (m, 4H), δ 6.30 (bs, 2H), δ 6.83-6.97 (m, 3H), δ 7.23-7.28 (m, 2H); MS: 588.2 (M+1).

Provenance & Evidence