作者:Anton Tverdokhlebov、Rustam Iminov、Andrey Tolmachev、Yulian Volovenko、Alexander Kostyuk、Alexander Chernega、Eduard Rusanov
DOI:10.1055/s-2008-1072572
日期:2008.5
The interaction of methyl 2,4-dioxo-2H-3,1-benzoxazine-1(4H)-acetate, 1-(3,3-dimethyl-2-oxobutyl)- and 1-(2-oxopropyl)-2H-3,1-benzoxazine-2,4(1H)-diones with substituted acetonitriles, XCH2CN (X = CN, hetaryl), has been studied. In acetic acid in the presence of sodium acetate, imidazo[1,2-a]quinoline-2,5(1H,3H)-diones, 2-tert-butyl- and 2-methylimidazo[1,2-a]quinolin-5(3H)-ones were obtained in 60-85% yield. A reaction pathway is suggested and has been confirmed by the isolation of specific intermediates. The scope and limitations of the method are discussed. The structure of the obtained imidazo[1,2-a]quinoline derivatives has been assigned unambiguously on the basis of an X-ray crystallographic study.
研究了 2,4-二氧代-2H-3,1-苯并恶嗪-1(4H)-乙酸甲酯、1-(3,3-二甲基-2-氧代丁基)-和 1-(2-氧代丙基)-2H-3,1-苯并恶嗪-2,4(1H)-二酮与取代的乙腈 XCH2CN(X = CN,庚基)之间的相互作用。在醋酸钠存在下的醋酸中,得到了咪唑并[1,2-a]喹啉-2,5(1H,3H)-二酮、2-叔丁基和 2-甲基咪唑并[1,2-a]喹啉-5(3H)-酮,收率为 60-85%。该方法提出了一种反应途径,并通过分离特定的中间产物得到了证实。讨论了该方法的范围和局限性。在 X 射线晶体学研究的基础上,对所获得的咪唑并[1,2-a]喹啉衍生物的结构进行了明确的分配。