利用环氧丙烷对γ-丁内酯的催化扩环反应一步法合成内酯型冠醚

One-step synthesis of oxo-crown ethers by catalytic ring-enlargement of γ-butyrolactone with propylene oxide

探索用Mg-Al基复合物催化剂催化环氧丙烷(PO)嵌入γ-丁内酯(GBL)经扩环反应一步法合成内酯型冠醚的新方法。FTIR、HPLC-(ESI)MS及UV的表征结果表明上述反应形成了内酯型冠醚的特征结构。此合成方法简便快捷,转化率高,无须稀释剂。实验结果表明150～160℃、0.5～0.6 MPa、n(PO)∶n(GBL)=13∶1条件下γ-丁内酯的转化率达到90.4%。

A one-step synthesis of oxo-crown ethers by ring-enlargement of γ-butyrolactone with propylene oxide catalyzed by Mg-Al composite was investigated.The formation of oxo-crown ether structure in the above reaction was identified by FT-IR,HPLC-（ESI）MS and UV.The novel synthesis route was simple and convenient,and had the advantage of high conversion of γ-butyrolactone without using any diluent.The experimental result showed that conversion of γ-butyrolactone reached 90.4% at 150—160 ℃ and 0.5—0.6 MPa when the mole ratio of PO to GBL was 13∶1.