5-Chloro-2-methoxybenzene-1-sulfonyl chloride → N-(5-bromo-2-hydroxymethyl-phenyl)-5-chloro-2-methoxybenzenesulfonamide

Beteiligte Stoffe

Reaktionsschritte

A solution of (2-amino-4-bromo-phenyl)-methanol (1.53 g, 7.57 mmol) in pyridine (15 mL) was treated with 5-chloro-2-methoxybenzenesulfonyl chloride (1.85 g, 7.57 mmol) at room temperature and stirred for 72 h, then poured upon ice-cold 2 M aq. hydrochloric acid solution and extracted with ethyl acetate. The organic layer was washed with brine, dried (MgSO4), and evaporated to produce a gummy residue, from which the product was precipitated by addition of toluene. The precipitate was collected by filtration and dried to afford N-(5-bromo-2-hydroxymethyl-phenyl)-5-chloro-2-methoxy-benzenesulfonamide (2.51 g, 82%). Off-white solid, MS (ISP)=404.2 (M−H)−.

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