自由基型的脂肪醛與烯烴脫羰—加成反應研究
[Abstract]:The construction of new chemical bonds is the core of organic synthetic chemistry and the basis and key of synthetic medicine, pesticide and all kinds of organic functional materials. In recent decades, there have been numerous reports of transition metal-catalyzed coupling reactions forming new chemical bonds. However, with the rise of the concept of "green chemistry" in recent years, the development of mild, environmentally friendly and easily available raw materials has become a new direction of organic synthesis chemistry. This paper focuses on the development of new chemical bonds for environmentally friendly decarbonylation, and studies the decarbonylation and addition of aliphatic aldehydes, aliphatic olefins and aromatic olefins under the condition of non-metallic participation. The specific research contents include the following two aspects: 1. Decarbonylation of aliphatic aldehydes and electron deficient alkenes was realized under the condition of no metal participation. In this reaction, di-tert-Ding Ji peroxide was used as a radical initiator and oxidant to initiate the splitting of C (sp2) -H bond of aldehydes, which was converted into acyl radical, and then the alkyl radical formed by a molecule of CO, was added to the double bond of olefin. A single decarbonylation-addition product was obtained selectively. This reaction has good tolerance for both straight chain and branched aldehydes, and broadens the application range of peroxide-promoted decarbonylation of aldehydes. 2. A kind of aliphatic aldehydes was developed under the condition of non-metallic participation and cheap aliphatic aldehydes as raw materials. The oxidative decarbonylation of aldehydes, N-hydroxyphthalimide (NHPI) and aromatic olefin was carried out in order to form C-C bond and C-O bond. The reaction was also carried out with di-tert-Ding Ji (DTBP) as the free radical initiator and oxidant. The reaction yield was high, the conditions were mild, and the reaction was suitable for both terminal aromatic olefins and non-terminal aromatic olefins. This is the first time that the decarbonylation of aldehydes has been applied to the difunctionalization of olefins. At the same time, the target product of our study is very easy to protect to obtain alkoxy amine compounds. Therefore, the oxidative decarbonylation of these three components provides a novel method for the synthesis of alkoxy amines.
【學位授予單位】:湘潭大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:O626
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