聚苯乙烯基二苯基膦-四氯化钛复合物的研究

Poly(Styryl)biphenylphosphine-Titanium Tetrachloride Complex

本文合成了一种交联的聚苯乙烯基二苯基膦载体小球(含有5.02%的P),在氯仿中与四氯化钛反应形成一种十分稳定的高分子络合物A(/Ph_(3)P-TiCl_(4)-PPh_(3)-)(含15.8%Cl)相当于1g络合物小球络合0.831mol TiCl_(4)。此络合物对于酯化、缩醛、缩酮、成醚等有机反应均有较高的产率。

A cross-linked bead of poly (styryl) biphenylphosphine containing 5.02% of phosphine was synthesized and combined with titanium tetrachloride in chloroform to form a very stable polystyrene bound bi(triphenylphosphine) -titanium tetrachloride complex containing 15.8% of chlorine which corresponds to 0.831mmol TiCl_(4)/1g·complex beads. The complex can be used to catalyze a lot of organic reactions, such as esterifications, acetalizations, ketal formations and etherification in high yield. It is important that the complex as a polymer-supported Lewis acid catalyst have better stability and can be reused at least 10 times.