The Synthesis And Application Of Piperidyl Tert-butyl Di(Methoxy)Silane

This article is about the Ziegler-Natta catalysis and the external donors. As the discussion, we think that amino silane has a good performance. We analyze the method of introducing tert-butyl and amino to silicon. From the method above, we gave two ways of synthesis piperidyl tert-butyl di(methoxy)silane.The experiment has three parts. The first part is to synthesize the tert-butyl di(methoxy)silane. It's yield is about 90%. I have study the conditions of the tert-butyl Grignard reagent. And then introduce tert-butyl to trimethoxysilane, to prepare tert-butyl dimethoxysilane. And find the optimal temperature of the reaction and optimize the separation method. And redesign the process of separation. The isolated yield is 67%.The second part is synthesis. Tert-butyl dimethoxysilane is chloride with chlorine. The conditions are mild, no byproducts are produced. The GC yield is near to 100%. Then aminolysis of the chloride silane with piperidine to produce the piperidyl tert-butyl di(methoxy)silane.The third part, I explored the dehydrogenative silylation between amines and phenols. Synthesis the Sm-imine complexes, to catalyze the reaction between amines and silanes.Let the piperidyl tert-butyl di(methoxy)silane as external donor. In the conditions of CS-1 and TEAL, we found that the productivity is similar than DDS. And the MI is 0.3-0.6. The propylene polymerization experiments showed that piperidyl tert-butyl di(methoxy)silane has a special performance.