The synthesis of several important organosilicon intermediates
Organosilicon materials have a series of excellent properties. So far, they have developed into an important branch of the chemical industry that is technology-intensive and occupies a certain position in the national economy, and has enabled various industries to obtain huge economic benefits. In recent years, due to high-tech With development, the variety of silicone polymers has clearly developed in the direction of functional, refined, professional, and serialized. Its number is as many as more than 5,000, and it is still increasing. It is the most suitable for the requirements and development of the times. One of the materials. This paper mainly focuses on the synthesis of several important organosilicon monomers, investigates the influence of various factors on their synthesis, and optimizes the synthesis process. The following results are obtained:
1. Through comparison, self-made The sulfur-containing compound 4-carboxy-1,3-thiazolidine is used as a co-catalyst, which greatly enhances the catalytic activity of chloroplatinic acid, and enables the addition reaction of methyldichlorosilane and chloropropene to obtain γ-chloropropene in a higher yield The yield of methyl dichlorosilane can reach 64.9%. In the process of synthesizing γ-chloropropyl methyl dichlorosilane, triethylamine, which has the best catalytic effect, is used as a co-catalyst to form a complex with chloroplatinic acid. Catalytic system, and the optimal process conditions of the reaction are optimized by orthogonal test method, the reaction time is greatly shortened, and the yield is as high as 85%, which is much higher than the yield reported in the previous literature.
2. Synthesis of γ in the alcoholysis reaction -In the process of chloropropylmethyldimethoxysilane, the influence of different factors on the alcoholysis reaction was investigated, and the orthogonal test method was used to improve the alcoholysis reaction, and the optimal process conditions were optimized. The rate can reach 83.8%. And there is no need to add a solvent in the reaction process, which further greatly simplifies the separation and purification of the reaction, thereby achieving the purpose of saving costs and reducing energy consumption, and is an industrially feasible and preferred synthesis process.