Hydrochloric Acid → 1-(t-Butylamino)isoquinoline-5-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

Methyl 1-(t-butylamino)isoquinoline-5-carboxylate (1.6 g, 6.20 mmol) obtained in Step (5) above was stirred in a solution of tetrahydrofuran (16 mL) and distilled water (16 mL). The reaction solution was added with LiOH (0.57 g, 13.6 mmol) and stirred for about 12 hours at 80° C. The reaction mixture was cooled to room temperature and adjusted to have a pH value in a range of 1˜2 by adding 1N aqueous HCl. The reaction mixture was diluted with ethyl acetate, and washed with distilled water. The organic layer thus obtained was dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure to obtain the title compound (0.6 g, 40%).

Provenance & Evidence