PIDA作用下構(gòu)建二氮雜卓母核結(jié)構(gòu)的方法學研究
[Abstract]:Up to now, heterocyclic synthesis has been developed for many years, but the search for new methods of heterocyclic structure synthesis is still a hot topic in the field of drug chemistry. The structure of dibenzo [BNE] [1 (4)] azodiazepines is an important heterocyclic compound, which is widely found in many physiologically active drugs. High valence iodine reagents have been studied for many years because of their unique oxidation ability in the formation of carbon-carbon bonds, carbon-oxygen bonds and carbon-nitrogen bonds, so they are still used to increase the yield of different heterocyclic compounds. Furthermore, it is well known that high valence iodine reagents can produce stable nitrogen cationic intermediates when they react with N-methoxylamine compounds, and then undergo intramolecular aromatic electrophilic cyclization to obtain different kinds of nitrogen-containing heterocyclic compounds. The research in this paper mainly includes the following aspects: 1. Through the research and inspiration of relevant literature and previous research work of our group, we have designed a carbon-nitrogen bond mediated by oxidation of high valence iodine reagent to complete the synthesis of dibenzo [b]. E] method for constructing heterocyclic structures of diazepines. 2. Due to the electron donor effect of methoxy, a stable intermediate of nitrogen ions can be formed during the oxidative cyclization of methoxy substituted nitrogen compounds. Therefore, we try to apply this theory to practice to complete the aromatic-electrophilic cyclization of this molecule to obtain different nitrogen-containing heterocyclic compounds. 3. According to the influence of electron effect and space effect, we designed 16 samples with two aromatic rings containing different substituents in the substrate system to verify the effect of substituents on the yield of the reaction. 4. Methoxy groups can be removed under reductive conditions for wider application. The structure of demethoxy can be used to synthesize more dibenzo [BX] [1 + 4] diazazepines. The obvious characteristics of this method are its wide range of suitable substrates, mild reaction conditions and the absence of heavy metals in the key step of oxidative coupling. And the end product of methoxy can be removed to prepare more derivatives of amide structure.
【學位授予單位】:天津大學
【學位級別】:碩士
【學位授予年份】:2014
【分類號】:R914
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