Benzoic acid, 2-(aminosulfonyl)-, methyl ester → N1-(2,6-dichloro-7-methyl-8-purinyl)-2-carbomethoxybenzenesulfonamide

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Reaction Steps

At 70° C., 6.60 g (28 mmol) of 2-carbomethoxybenzenesulfonamide was added to a suspension of 3.00 g (14.0 mmol) of 8-amino-2,6-dichloro-7-methylpurine in 150 ml of pyridine. After 3 hours at 70°-80° C., the reaction mixture was evaporated down in a rotary evaporator, and the residue was stirred into ice/H2O and acidified with dilute HCl. The desired product was obtained in the form of a brown powder having the following physical data (active ingredient 1.020)

Provenance & Evidence