Method of preparing oxazolidone

• Main Authors: LUO RONGCHANG, YANG ZHI, JI HONGBING, ZHOU XIANTAI
• Format: Patent
• Language: Chinese; English
• Published: 26.10.2016
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HETEROCYCLIC COMPOUNDS; METALLURGY; ORGANIC CHEMISTRY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention discloses a method of preparing oxazolidone. The method uses aziridine and carbon dioxide as materials and imidazole ionic liquid modified Salen metal complex comprising polyether chains as a catalyst, and allows high-efficiency and high-selectivity catalytic synthesis of oxazolidone under a pressure of 0.1-2.0 Mpa at a temperature of 30-70 DEG C; the process has relatively mild reaction conditions, there is no need for any solvent or co-catalyst, and reaction time is short; in addition, the catalyst provided herein can form a homogeneous catalytic system with a substrate under certain temperature and pressure, and by adding the solvent, it is possible to separate from the reaction system to enable reuse. 本发明公开了种噁唑烷酮的制备方法。该方法以氮杂环丙烷和二氧化碳为原料，以含有聚醚链的咪唑类离子液体修饰的Salen金属配合物作为催化剂，在压力为0.1-2.0MPa，温度为30-70℃，能够高效率、高选择性地催化合成噁唑烷酮。该过程反应条件相对温和，不需要任何溶剂或助催化剂，反应时间短。此外，本发明提供的催化剂在定温度、压力下能够与底物形成均相催化体系，通过加入溶剂可以与反应体系分离，达到重复使用的目的。