The rapid one-pot catalytic synthesis of double-capped oligoesters was carried out by the ring-opening polymerization of various cyclic ester monomers (i.e. ε-caprolactone (ε-CL), δ-valerolactone (DVL), γ-butyrolactone (GBL), and L-lactide (L-LA)) followed by the transesterification reaction with a variety of alkyl esters as an end-capping agent. Simple metal amides were found to be an effective catalyst under mild condition. Among them, LiN(SiMe₃)₂ was shown to be the most active catalyst giving 94% conversion of double-capped oligo(ε-caprolactone) within 5 min at room temperature. The average chain length of the oligoesters can be controlled by the adjustment of the ratio of an alkyl ester to monomer, the reaction time and reaction temperature.

通过各种环酯单体（即ε-己内酯（ε -CL），δ-戊内酯（DVL），γ-丁内酯（GBL））的开环聚合反应，快速进行一锅法合成双封端低聚酯。，然后与L-丙交酯（L -LA））进行酯交换反应，并使用各种烷基酯作为封端剂。发现简单的金属酰胺在温和条件下是有效的催化剂。其中，LiN（SiMe ₃）₂是最活泼的催化剂，可提供94％的双封端低聚物（ε）转化率-己内酯）在室温下5分钟内。可以通过调节烷基酯与单体的比例，反应时间和反应温度来控制低聚酯的平均链长。