Benzotriazol-1-ylacetic Acid is used as a reagent in the synthesis of benzotriazole imidazoline compounds which are used as metal corrosion inhibitors. Benzotriazol-1-ylacetic Acid is also a reagent in the synthesis of N-(benzo[1,2,3]triazol-1-yl)-N-((benzyl)acetamido)phenyl carboxamides which are used as severe acute respiratory syndrome coronavirus (SARS-CoV) 3CLpro inhibitors.