4-Methoxybenzenesulfonyl chloride → 5-Bromo-2-(4-methoxy-benzenesulfonylamino)-3-methyl-benzoic acid methyl ester

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 24.5 g (100 mmol) of the product of Example 133 in 100 mL of pyrdine was added 21.0 g (100 mmol) of p-methoxybenzenesulfonyl chloride and the resulting mixture was heated to 80° C. for 24 h. The reaction mixture was then quenched with ice cold water and acidified with concentrated HCl. The resulting mixture was extracted with chloroform, washed with water, dried over MgSO4, filtered and concentrated in vacuo. The residue was triteretd with diethyl ether, filtered and dried to provide 35 g (84%) of the desired product as a brown solid. Electrospray Mass Spec 416, (M+H).

Provenance & Evidence