Ethanol → 7-Amino-2,3-dihydro-1,4-benzodioxine-5-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

56 g of 7-nitro-1,4-benzodioxane-5-carboxylic acid, 560 ml of absolute ethanol and Raney nickel were introduced into an autoclave and then hydrogen under a pressure of 65 kg/cm2 was introduced while heating. The mixture was then agitated at 60° C. and treated with a solution of 50 ml of soda lye in 450 ml of water. The solution was filtered and treated with 50 ml of hydrochloric acid. The precipitate was dried off, washed with water and dried. 36.5 g of 7-amino-1,4-benzodioxane-5-carboxylic acid were obtained (M.P.: 220° C.; yield: 75%).

Provenance & Evidence