FTP name this set of reactions, the ester analog of the aldol condensation.
The Dieckmann variation of this reaction system results in a five or six member ring. Methanoate esters cannot undergo this set of reactions due to the lack of a highly acidic alpha hydrogen, which is usually removed by an alkoxide in the first step of the reaction. This yields an intermediate ester enolate, which then attacks the carbonyl carbon of another ester in a nucleophilic substitution. The intermediate then collapses, yielding a beta ketoester. FTP name this set of reactions, the ester analog of the aldol condensation.
The Dieckmann variation of this reaction system results in a five or six member ring.
{Claisen condensation}