Nitric Acid → 5-Nitroisoquinoline-1-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

Isoquinoline-1-carboxylic acid (3.98 g, 23.0 mmol) was dissolved in conc. sulfuric acid (16 ml) at 0° C. A mixture of conc. sulfuric acid (5 ml) and fuming nitric acid (5 ml) was added over 10 min. and the reaction stirred for a further 1 h at 0° C., then poured into ice-water (400 ml). The solid was collected by filtration, then washed with water (100 ml), ethanol (100 ml) and ether (100 ml), then dried under vacuum to give the title compound (4.1 g, 82%).

Provenance & Evidence