1、通过磺酰叠氮以及带吸电子基团的苯磺酰胺和端炔在铜盐做催化剂和三乙胺的存在下,一锅法反应生成中间体脒,然后中间体碳负位接着进攻分子内的碳硫键上的碳正位
摘要:α-芳基脒是一类重要的生物活性分子,由于它极好的生理活性,在抗原虫,抗肿瘤,抗炎,抗病毒,抗菌,除草等方面广泛的被使用。因此,简单高效环境友好地合成α-芳基脒是科研工作者长期研究的重要课题。本论文采用Smiles重排反应在温和的条件下,一锅法高效经济环保地合成α-芳基脒,其主要工作如下:
1: 以N-苄基4-硝基苯磺酰胺,苯乙炔,对甲基苯磺酰叠氮作为底物,以溴化亚铜作为催化剂,三乙胺作为碱,二氯甲烷作为溶剂通过一锅法反应合成α-芳基脒;
2:通过1HNMR核磁对其结构进行表征,通过对谱图的分析证明合成工作达到预期目标;
3:通过调节反应时间,反应温度,物料比等条件,探索出α-芳基脒的最优合成工艺条件。实验结果表明,在氮气条件下,以溴化亚铜作为催化剂,三乙胺作为碱,以二氯甲烷作为溶剂,在反应体系为1:3:3时常温下反应12h,达到最好效果90%,并扩展了几个α-芳基脒衍生物。
摘要关键字:α-芳基脒;烯酮亚胺;Smiles重排
Synthesis of α-Aryl Amidines from Ketenimines
abstract: α-Aryl adimine is an important class of bioactive molecules. It has been widely used in anti-protozoal, anti-tumor, anti-inflammatory, anti-virus, anti-bacterial, herbicidal and other aspects. Therefore, the simple, efficient and environment-friendly synthesis of α-aryl adimine is an important subject for long-term research by researchers. This paper uses the Smiles rearrangement reaction to synthesize α-aryl adimine in a mild, efficient, environmentally friendly manner under mild conditions. Its main work is as follows:
1. α-Aryl adimine and their derivatives were synthesized from N-benzyl 4-nitrobenzene sulfonamide, phenyl acetylene, p-methyl benzene sulfonyl azide by one-pot reaction using CuBr as the catalyst, triethylamine as the base and methylene chloride as solvent.
2. The products were characterized by 1HNMR, and the results proved to be the desired products.
3. To explore the optimal reaction conditions for the synthesis of α-aryl adimines, a series of reaction conditions including the reactive time, the reactive temperature, the ratio of substrates, etc were investigated. The experimental results showed that, under nitrogen conditions, the optimal reactions with the highest 90% yield for the synthesis of α-aryl adimines were CuBr as catalyst, triethylamine as base, methylene chloride as solvent and the ratio of substrates 1:3:3 under room temperature for 12 hours
Keywords: α-Aryl adimine; Ketenimine; Smiles rearrangement
目录
1前言 1
1.1脒类化合物的介绍 1
1.2脒类化合物的应用 1
(1)脒在农业方面的应用 1
(2)脒在化学方面的应用 2
(3)脒在药学方面的应用 2
1.3脒类化合物的合成方法 2
(1)腈的氨解法 2
(2)酰胺法: 3
(3)原甲酸酯法 3
(4)改进的Pinner法: 4
(5)α-芳基脒的合成 4
1.4本课题的研究目的和意义 5
1.5本课题主要研究内容及技术路线 5
2 实验方法和内容 6
2.1 实验准备 6
2.2 实验内容 7
3实验结果与讨论 10
3.1α-芳基脒合成的机理 10
3.2α-芳基脒的制备 10
(1) 底物硝基磺酰胺的合成 10
(2) α-芳基脒及其衍生物的合成。 10
3.3α-芳基脒的条件优化 11
3.3.1反应温度对中间产物得率的影响 11
3.3.2反应时间对中间产物的率的影响 12
3.3.3底物摩尔比对中间产物得率的影响 12
3.3.4催化剂种类对产物得率影响 13
3.3.5碱的种类对产物得率的影响 13
3.3.6溶剂种类对产物得率的影响 14
3.4其他两种α-芳基脒衍生物的制备 15
结论 16
致谢 17
参考文献 18
附录 19
1前言
1.1脒类化合物的介绍
脒是分子中含有脒基的一类化合物,遇到酸会容易变成盐,水解变成羧酸。脒不仅可以作为合成含氮杂环化合物的中间体。还可以作为药物使用。低级的脒常具有刺激性。