One-pot reactions are chemical processes where multiple reactants are combined and transformed into products in a single reaction vessel without the need for intermediate purification steps. This approach simplifies the synthesis by reducing the time and resources required, making it more efficient for producing complex molecules. These reactions are commonly used in organic chemistry and can involve various types of transformations, such as condensation, oxidation, or reduction. By minimizing the handling of materials and the number of steps, one-pot reactions can enhance yield and reduce waste, aligning with the principles of green chemistry.