The present invention relates to a process for preparing a lactone. The process comprises the steps of reacting an aldehyde with an organic halide in a carbon chain extension reaction to form an alcohol compound comprising a functional group capable of allowing for carbonylation of said alcohol compound, and then reacting said alcohol compound in a carbonylation reaction to form an hydroxycarboxylic acid; and cyclising the hydroxycarboxylic acid to produce the lactone.
                            本发明涉及一种制备内酯的方法。该方法包括以下步骤:将醛与有机卤化物在碳链延伸反应中反应,形成含有功能基团的醇化合物,该功能基团能够允许醇化合物进行羰基化反应,然后在羰基化反应中反应所述醇化合物,以形成羟基
羧酸;将羟基
羧酸环化,以产生内酯。