Tea-derived catalysts: a sustainable approach to organic transformations.

The increasing demand for sustainable and environmentally friendly catalytic systems has led researchers to use natural resources to develop catalysts. In this line, tea, as a widely consumed beverage rich in bioactive compounds such as polyphenols, has been proposed as an effective material for the synthesis of tea-derived catalysts. These catalysts with unique properties such as high stability, reusability, and improved catalytic activites have been successfully employed in various organic reactions such as reduction, two-component catalytic reactions, multicomponent reactions, and miscellaneous reactions offering high yields under mild and environmentally friendly conditions. This review article explores the preparation, characterization, and application of these types of catalysts, highlighting their potential in transforming organic reactions based on green chemistry rules and advancing sustainable synthetic methods.