Sodium Hydroxide → 2,5-Dichloro-3-[(methylsulfonyl)amino]benzoic acid hydrochloride

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

From common intermediate methyl 3-amino-2,5-dichlorobenzoate following the procedure outlined in scheme. Methyl 3-amino-2,5-dichlorobenzoate (2.10 g, 9.55 mmol), DIEA (3.0 ml) were stirred in DCM (40 ml) at 0° C. methanesulfonyl chloride (2.18 g, 19.08 mmol) was added dropwise whike stirring at 0° C. After 2 hrs at 0° C., reaction was allowed to warm to room temperature while stirring overnight. Quenched rxn with saturated NH4Cl and washed with brine. Organic layer with dried to yield crude methyl 2,5-dichloro-3-[(methylsulfonyl)amino]benzoate (3.10 g) which will be carried on. methyl 2,5-dichloro-3-[(methylsulfonyl)amino]benzoate (3.10 g) was treated with NaOH, methanol following procedure outlined in scheme to form 2,5-dichloro-3-[(methylsulfonyl)amino]benzoic acid hydrochloride (3.53 g).

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