鈀催化N-取代苯胺鄰位C-H鍵選擇性活化羰基化合成鄰氨基苯甲酰胺
本文選題:C(sp~2)-H鍵活化 + 鈀催化反應(yīng); 參考:《河南師范大學(xué)》2017年碩士論文
【摘要】:鄰氨基苯甲酰胺類化合物具有重要的生物及藥理活性,在醫(yī)藥、農(nóng)藥、有機(jī)合成等領(lǐng)域有著廣泛的應(yīng)用。但目前其主要合成方法仍存在許多問題:原子經(jīng)濟(jì)性差;環(huán)境污染嚴(yán)重;對設(shè)備腐蝕性強(qiáng);成本高;反應(yīng)步驟冗長等。本文以廉價(jià)易得的N-取代苯胺、CO及胺為起始原料,經(jīng)鈀催化的N-取代苯胺鄰位C-H鍵選擇性活化羰基化反應(yīng)來直接合成鄰氨基苯甲酰胺類化合物,從而為該類化合物的合成開辟出一條原子經(jīng)濟(jì)性高、環(huán)境友好、條件溫和、成本低、合成路線簡短、簡單便捷的新途徑。本文共分四章,具體內(nèi)容如下:第一章,文獻(xiàn)綜述。本章總結(jié)了鄰氨基苯甲酰胺類化合物在醫(yī)藥、農(nóng)藥、有機(jī)合成等領(lǐng)域的重要應(yīng)用、鄰氨基苯甲酰胺類化合物的主要合成方法、以及鈀催化C(sp~2)-H鍵活化羰基化的研究進(jìn)展。在此基礎(chǔ)上,提出了本文的選題構(gòu)想。第二章,鈀催化N-取代苯胺鄰位C-H鍵活化羰基化合成鄰氨基苯甲酰胺。本章中,以醋酸鈀為催化劑,以N-取代苯胺、CO及胺為起始原料,經(jīng)鈀催化的N-取代苯胺鄰位C-H鍵活化羰基化反應(yīng)直接合成鄰氨基苯甲酰胺,并對反應(yīng)時(shí)間、反應(yīng)溫度、氧化劑種類及用量、添加劑種類及用量、溶劑種類等因素對反應(yīng)的影響進(jìn)行了探索和優(yōu)化。最后,在最優(yōu)的條件下合成了一系列鄰氨基苯甲酰胺類化合物,產(chǎn)率從中等至良好。第三章,鈀催化N-取代苯胺鄰位C-H鍵活化羰基化合成鄰氨基苯甲酰胺的機(jī)理探討。通過文獻(xiàn)調(diào)研及相關(guān)控制實(shí)驗(yàn),初步探討了碘化鉀、醋酸、醋酸鈀、醋酸銅和氧氣在改反應(yīng)體系中的作用,在此基礎(chǔ)上提出了該反應(yīng)的機(jī)理。第四章,硒催化5-氨基-1,2,3-噻二唑與胺氧化羰基化合成不對稱1,2,3-噻二唑脲。在完成上述研究內(nèi)容后,本章又進(jìn)行了硒催化5-氨基-1,2,3-噻二唑與胺羰基化合成不對稱1,2,3-噻二唑脲的研究探索。通過條件優(yōu)化探索,獲得了實(shí)施該反應(yīng)的適宜條件。在此基礎(chǔ)上合成了一系列不對稱1,2,3-噻二唑脲類化合物,目標(biāo)物產(chǎn)率從中等至良好。
[Abstract]:O-aminobenzoides have important biological and pharmacological activities and are widely used in medicine, pesticide, organic synthesis and so on. However, there are still many problems in the main synthesis methods, such as poor atomic economy, serious environmental pollution, strong corrosion to equipment, high cost, long reaction steps and so on. In this paper, o-aminobenzoamide compounds were directly synthesized by palladium catalyzed selective activation carbonylation of N-substituted aniline with N-substituted aniline CO and amine. Thus, a new way for the synthesis of this kind of compounds with high atomic economy, environmental friendliness, mild conditions, low cost, short synthesis route and simple and convenient synthesis is opened up. This paper is divided into four chapters, the specific contents are as follows: the first chapter, literature review. In this chapter, the important applications of o-aminobenzamide in medicine, pesticide and organic synthesis, the main synthesis methods of o-aminobenzamide, and the research progress of palladium catalyzed carbonylation of C(sp~2)-H bond are summarized. On this basis, this paper puts forward the idea of topic selection. In chapter 2, palladium catalyzed the activation of N-substituted aniline C-H bond to produce o-aminobenzoamide. In this chapter, using palladium acetate as catalyst, N-substituted aniline CO and amine as starting materials, o-aminobenzoamide was directly synthesized by palladium catalyzed carbonylation of N-substituted aniline with C-H bond. The effects of oxidant type and dosage, additive type and amount, solvent type on the reaction were explored and optimized. Finally, a series of o-aminobenzoamide compounds were synthesized under the optimum conditions. The yield of o-aminobenzoamide compounds ranged from medium to good. In chapter 3, the mechanism of synthesis of o-aminobenzoamide by activation carbonylation of N-substituted aniline by C-H bond catalyzed by palladium is discussed. The effects of potassium iodide, palladium acetate, copper acetate and oxygen on the modification of the reaction system were preliminarily discussed by literature investigation and related control experiments, and the mechanism of the reaction was put forward. In chapter 4, 5-amino-1-thiadiazole-3-thiadiazole and amine were synthesized by the oxidation carbonylation of 5-amino-2-thiadiazole-3-thiadiazoluron with selenium. After completing the above research, the synthesis of asymmetric 1H _ 2N _ 3-thiadiazolarbazuron catalyzed by seleno-catalyzed carbonylation of 5-amino-2-thio-3-thiadiazole with amine was studied in this chapter. The optimum conditions for the reaction were obtained by optimizing the conditions. On this basis, a series of asymmetric 1'2'2'3 'thiadiazole ureas were synthesized, and the target yield ranged from medium to good.
【學(xué)位授予單位】:河南師范大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:O625.632
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