Condensation organocatalysts refer to organic compound catalysts that can promote condensation reactions in organic synthesis. This type of catalyst has important applications in green chemistry, drug synthesis, and materials science. Condensation reaction usually refers to the process in which two molecules form larger molecules by losing small molecules (such as water, alcohol, ammonia, etc.). Condensation organocatalysts are widely used in modern organic synthesis, especially in esterification, dehydration, C-C bond formation, asymmetric synthesis and other reactions. They have the advantages of environmental protection, high efficiency, and no metal pollution. They are gradually replacing traditional metal catalysts and playing an increasingly important role in the fields of pharmaceuticals and material synthesis.