Are there alternatives to Butyl 2-oxopropanoate (CAS: 20279-44-1) in synthesis?

There are several alternatives to Butyl 2-oxopropanoate (CAS: 20279-44-1) in synthesis, including other esters like methyl 2-oxopropanoate and ethyl 2-oxopropanoate. Isomers such as the cis and trans forms can also be used, depending on the specific reaction requirements. Common substitutes include other carboxylic acid derivatives that can be easily converted to the desired ester through esterification reactions.