论文部分内容阅读
以聚(苯乙烯-异丙烯膦酸)-磷酸氢锆(ZPS-IPPA)为载体,对其苯环氯甲基化、磺酸化后与手性Salen Mn(Ⅲ)轴向配位,合成了一类新的固载型手性Salen Mn(Ⅲ)催化剂,采用FTIR,XPS,SEM,TEM,N2吸附等对催化剂表征.分别在次氯酸钠溶液和间氯过氧苯甲酸氧化体系中,考察了固载催化剂对苯乙烯、α-甲基苯乙烯、茚等非功能化烯烃不对称环氧化反应的催化性能,结果表明,与均相催化剂相比,对映体选择性明显提高.尤其在m-CPBA/NMO氧化体系中0℃反应12h,茚的环氧化物的转化率及ee值均达到99%以上.并且催化剂容易分离,回收使用5次仍能保持较好的催化性能.
The phenyl ring was chloromethylated with poly (styrene-isopropene phosphonic acid) -zirconium phosphate (ZPS-IPPA) as a support, and its coordination with chiral Salen Mn (Ⅲ) A new type of supported chiral Salen Mn (Ⅲ) catalyst was characterized by means of FTIR, XPS, SEM, TEM, N2 adsorption, etc. In the sodium hypochlorite solution and the meta-chloroperoxybenzoate oxidation system, The results show that the selectivity of enantioselective catalysis is higher than that of homogeneous catalysis, especially in m -CPBA / NMO oxidation system at 0 ℃ for 12h, the conversion and ee value of indene epoxides reached more than 99%, and the catalyst can be easily separated and the recovery can be used 5 times to maintain good catalytic performance.