Synthesis and Pharmacological Activities of Schiff Base Derivatives: An Overview

Abstract

Schiff bases are an important class of organic compounds characterized by the presence of an azomethine group (–C=N–), generally synthesized by condensation reactions between primary amines and aldehydes or ketones. Due to their structural diversity, ease of synthesis, and remarkable pharmacological properties, Schiff base derivatives have emerged as promising candidates in medicinal chemistry and pharmaceutical research. The present review highlights recent advances in the synthesis, physicochemical characteristics, metal complex formation, and pharmacological activities of Schiff base derivatives. Various synthetic approaches including conventional heating, microwave-assisted synthesis, solvent-free synthesis, and green chemistry methods have been discussed. Schiff bases and their metal complexes exhibit broad-spectrum biological activities such as antimicrobial, antifungal, antiviral, anti-inflammatory, antioxidant, anticonvulsant, antitubercular, antidepressant, antidiabetic, antihypertensive, and anticancer activities. Their ability to chelate transition metal ions significantly enhances their biological potential and therapeutic applications. The review also focuses on structure–activity relationship studies, mechanisms of action, analytical characterization techniques, and future perspectives for the development of novel Schiff base derivatives as therapeutic agents. Owing to their excellent pharmacological profile and synthetic versatility, Schiff bases continue to attract substantial attention in modern drug discovery and development research.