三氯化鋁催化炔酰胺和鄰亞甲基苯醌的環(huán)加成反應(yīng)
[Abstract]:Because of its unique molecular structure, acetylidene takes into account the relationship between the stability of acetylene group and the reaction activity, and shows good regioselectivity in chemical reaction. Therefore, in the organic synthesis methodology, natural products are fully synthesized. In particular, the synthesis of nitrogenous compounds has great advantages. The cycloaddition reaction of acetylene amides is a method that can efficiently synthesize monocyclic or polycyclic compounds. However, previous studies on cycloaddition reactions of acetylidene amides have been focused on the formation of carbon-ring compounds. However, there are few reports on the synthesis of heterocyclic compounds. Therefore, it is very important to study the application of acetylene amide in the synthesis of heterocyclic compounds. Amino substituted chromotene (benzopyran) structure as a common component of many natural products and drugs, its synthesis methods have been widely concerned. However, due to the traditional synthesis method of aminochromene compounds is relatively simple, so reported relatively few of these compounds. In this paper, AlCl3 was used to catalyze the cycloaddition reaction of acetylidene amide and o-methylene benzoquinone to synthesize different amine-substituted chromene compounds. 4-amino-2H-chroene compounds were synthesized by cycloaddition reaction of acetylidene amide with substituted group at the end of acetylene group and o-methylene benzoquinone in good yield and high enantioselectivity. 2-amino-4H-chroene compounds were obtained by the reaction of alkyne amide with o-methylene benzoquinone without substituents at the end of acetylene group in good yield. This method provides a convenient and efficient way for the synthesis of various amino substituted chromene compounds.
【學(xué)位授予單位】:鄭州大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2016
【分類號】:O621.256.7
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