Tf 2 O介导的α-酰基-β-(2-氨基吡啶基)丙烯酰胺的环化:获得N取代的4 H-吡啶基[1,2- a ]嘧啶-4-亚胺
摘要:
由三氟甲磺酸酐(Tf 2 O)介导的α-酰基-β-(2-氨基吡啶基)丙烯酰胺开发了一种N-取代的4 H-吡啶并[1,2 - a ]嘧啶-4-亚胺的简便有效的直接合成方法在2-氯吡啶存在下。该酰胺活化方案具有反应条件温和,操作简单,产率高和化学选择性高的特点,并且还可以通过实用的一锅法应用于取代的4 H-吡啶并[1,2- a ]嘧啶-4-酮的合成。程序。
An Efficient Friedlander Condensation Using Sodium Fluoride as Catalyst in the Solid State
作者:K. Mogilaiah、Ch. Srinivas Reddy
DOI:10.1081/scc-120023427
日期:2003.9
Abstract Sodium fluoride catalyzed Friedlander condensation of 2-aminonicotinaldehye with various carbonyl compounds containing α-methylene group in the solid state furnished corresponding 1,8-naphthyridines. The reaction proceeds efficiently at room temperature in high yields and in a state of excellent purity.
Oxidation of β-Ketoamides: The Synthesis of Vicinal Tricarbonyl Amides
作者:Yueyang Liu、Zhiguo Zhang、Yameng Wan、Guisheng Zhang、Zhonglian Li、Jingjing Bi、Nana Ma、Tongxin Liu、Qingfeng Liu
DOI:10.1021/acs.joc.6b03062
日期:2017.4.7
A facile and direct oxidative reaction for the synthesis of vicinaltricarbonyl amides in moderate to excellent yields (53–88%) was developed starting from readily available β-ketoamides in the presence of phenyliodine(III) bis(trifluoroacetate). The resulting products possess significant synthetic potential, making this approach a valuable addition to the group of traditional methods already available
Theoretical Study on the Structures and Absorption Properties of Yellow Azomethine Dyes
作者:Seiji Ichijima、Hiroo Fukunaga、Hidetoshi Kobayashi、Makoto Ishihara、Nobuaki Koga
DOI:10.1246/bcsj.76.733
日期:2003.4
To examine the relationship between the structural features and the visible absorption spectra of yellow α-acylacetanilide azomethinedyes, we carried out measurements of the visible absorption spectra, X-ray crystal structure analyses, and density functional theory calculations for 2-benzoyl-2-[N-(4-diethylamino-2-methylphenyl)imino]-2′-chloroacetanilide (BA) and 2-[N-(4-diethylamino-2-methylphen
为了检查黄色 α-酰基乙酰苯胺偶氮甲碱染料的结构特征与可见吸收光谱之间的关系,我们对 2-苯甲酰基-2- 的可见吸收光谱进行了测量、X 射线晶体结构分析和密度泛函理论计算。 [N-(4-diethylamino-2-methylphenyl)imino]-2'-chloroacetanilide (BA) 和 2-[N-(4-diethylamino-2-methylphenyl)imino]-2-pivaloyl-2'-chloroacetanilide (PA) )。BA 显示可见吸收光谱,在绿色区域具有较高的摩尔消光系数和不需要的吸收曲线,而 PA 显示可见吸收光谱,在绿色区域具有较低的摩尔消光系数和锐切吸收曲线地区。BA 和 PA 具有一个共同的结构特征,即对氨基苯基片段与偶氮甲碱-氨基甲酰基 (–N=C–CONH–) 片段共面,产生发色团,但与酰基片段垂直。稳定结构主要受 π..
Regioselective synthesis of functionalized [1,8]naphthyridine derivatives via three-component domino reaction under catalyst-free conditions
作者:Xian Feng、Jian-Jun Wang、Juan-Juan Zhang、Cheng-Pao Cao、Zhi-Bin Huang、Da-Qing Shi
DOI:10.1039/c4gc01469c
日期:——
and efficient one-potsynthesis of functionalized [1,8]naphthyridine derivatives via a three-component domino reaction of glutaraldehyde, malononitrile, and β-ketoamides, undercatalyst-freeconditions in an environmentally friendly medium (ethanol) is described. The main advantages of this protocol are short reaction times, practical simplicity, high yields, catalyst-freeconditions, cheap and benign