3-Bromo-2-oxobutanoic acid methyl ester（Cat No.:R017438）is a halogenated α-keto ester with a bromine atom at the 3-position, a ketone at the 2-position, and a methyl ester group at the terminal carboxylic acid. This pale yellow to colorless liquid is reactive and widely used as a synthetic intermediate in organic chemistry. It participates readily in nucleophilic substitution and enolate chemistry, making it valuable in the construction of complex molecules, such as heterocycles and pharmaceuticals. Its α-bromoketone structure facilitates further functionalization, and it’s often used in the preparation of bioactive compounds and peptide analogs.