Cinnamic Acid Derivatives and Their Biological Applications

Cinnamic acid derivatives encompass a diverse class of compounds obtained by chemical modification of the core cinnamic acid scaffold, which consists of a phenyl ring conjugated to an acrylic acid moiety. Substitutions on the aromatic ring or esterification and amidation of the carboxyl function give rise to esters, amides, hybrids and other multifunctional molecules. Such modifications tailor physicochemical properties, enhance membrane permeability and modulate interactions with biological targets. These derivatives exhibit a broad spectrum of activities, including antimicrobial, antioxidant, anti-inflammatory, anticancer and antidiabetic effects. In antimicrobial applications, certain derivatives disrupt cell membranes or inhibit key enzymes, while others act synergistically with β-lactam antibiotics to overcome resistant strains. As antioxidants, they scavenge free radicals and inhibit lipid peroxidation, offering protection against oxidative stress in chronic disorders. In oncology, select cinnamic derivatives induce apoptosis and interfere with signalling pathways. Their capacity to inhibit enzymes such as lipoxygenases or proteases has underpinned the design of multi-target agents for inflammatory and cardiovascular diseases. Beyond human health, cinnamic acid esters show promise as environmentally friendly fungicides in agriculture, and catechol-bearing analogues support wound healing by combining antimicrobial and pro-regenerative properties. The structural versatility of cinnamic acid derivatives thus positions them as valuable leads in drug discovery and agricultural chemistry.

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Cinnamic Acid Derivatives and Their Biological Applications publication trend

The graph below shows the total number of articles in cinnamic acid derivatives and their biological applications across all publications each year (not limited to Nature Index journals).

Technical terms

Cinnamic acid derivative: Compound structurally based on cinnamic acid, modified at the aromatic ring or carboxyl group to alter biological properties.

Minimum inhibitory concentration (MIC): Lowest concentration of an antimicrobial that prevents visible growth of a microorganism.

Synergistic effect: Interaction between two agents that produces a combined effect greater than the sum of their individual effects.

β-Lactam antibiotic: Class of antibiotics featuring a four-membered β-lactam ring, which inhibits bacterial cell wall synthesis.

Biofilm: Structured community of microorganisms adherent to a surface and embedded in a self-produced extracellular matrix.

References

1. Synergistic Interactions between Selected β-Lactam Antibiotics and Cinnamic Acid and Its Chosen Derivatives. Antibiotics (2024).
2. Synthetic Cinnamides and Cinnamates: Antimicrobial Activity, Mechanism of Action, and In Silico Study. Molecules (2023).
3. Cinnamic Acid Derivatives and Their Biological Efficacy. International Journal of Molecular Sciences (2020).
4. Bioactivity and structure-activity relationship of cinnamic acid esters and their derivatives as potential antifungal agents for plant protection. PLOS ONE (2017).
5. Multifunctional Cinnamic Acid Derivatives. Molecules (2017).
6. Multitarget Molecular Hybrids of Cinnamic Acids. Molecules (2014).
7. Synthesis and Biological Evaluation of Novel Cinnamic Acid-Based Antimicrobials. Pharmaceuticals (2022).