β-keto esters are organic compounds characterized by the presence of both a ketone and an ester functional group. They have the general structure R1C(=O)CH2C(=O)OR2, where R1 and R2 are hydrocarbon groups. These compounds are important in organic synthesis and are often used as intermediates in the production of various pharmaceuticals and agrochemicals. One of the key reactions involving β-keto esters is the Claisen condensation, which allows for the formation of larger carbon chains. Additionally, they can undergo decarboxylation to yield enolates, making them valuable in the synthesis of complex molecules.