Water → 4-Amino-5-iodo-2-methoxybenzoic acid

Participants

Reaction Steps

To a stirred and heated (25° C.) solution of 5 g of 4-amino-2-methoxy benzoic acid in 75 ml of 1,4-dioxane were added 6.9 g of grinded 1-iodo-2,5-pyrrolidinedione. The mixture was stirred in an oil bath at 105° C. for 3 hours. After the addition of 300 ml of water, the crystallized product was filtered off and dried, yielding 4.3 g (48.9%) of 4-amino-5-iodo-2-methoxybenzoic acid; mp. 180.6° C. (interm. 5).

Provenance & Evidence