对 3-含氧酸的几种苯胺在与硝酸铈铵的氧化反应中的行为的研究表明,选择性分子间 CC 键形成,导致它们的二聚体,是这些化合物的典型特征。这些二聚体在两条路线 A 和 B 中环化,产生 3-[2'-(1'-aniline-3'-oxo)-indene]-quinoline-2-on 衍生物与 HCl(g)(路线 A ),并使用 H2SO4 作为环化剂,得到呋喃-3,4-二羧酸衍生物(路线 B)。
1,4,2-Dioxazol-5-ones as Isocyanate Equivalents: An Efficient Synthesis of 2-Quinolinones via β-Keto Amides
作者:Ramakrishna Guduru、Anand Vala、Nirali Parmar、Jigar Y Soni、Sharadsrikar Kotturi
DOI:10.1055/s-0040-1720889
日期:2021.12
Under thermal conditions, 1,4,2-dioxazol-5-ones are known to undergo decarboxylation followed by Lossen’s rearrangement to yield isocyanates. Described herein is the in situ trapping of the resulting isocyanates with carbon nucleophiles to synthesize β-keto amides. Furthermore, a general and mild method for the conversion of the resulting β-keto amides into quinolin-2-ones is reported.
Palladium-Catalyzed Formation of C=C Bonds: A Regioselective Strategy for the Synthesis of 2-Vinylfurans by 1,2-H Shift of Palladium-Carbene Complexes
作者:Haiying Zhan、Xiulian Lin、Yanying Qiu、Zuodong Du、Peixian Li、Yongjian Li、Hua Cao
DOI:10.1002/ejoc.201300016
日期:2013.4
A convenient method to synthesize vinylfurans through a palladium-catalyzed cyclization/1,2-H shift sequence under mild conditions is described. This is an efficient strategy to synthesize 2-vinylfurans from ene–yne ketones, and the corresponding products are obtained in good yields.
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
SYNTHESIS OF NOVEL DERIVATIVES OF 4-METHYLTHIO-N-ARYL-2-PYRIDONE AND DEAZAPURINE ANALOGUES: THE REACTION OF KETENE DITHIOACETALS WITH SUBSTITUTED ACETANILIDES
作者:Galal H. Elgemee、Hosny A. Ali、Ahmed H. Elghandour、Ghada W. Abd Elaziz
DOI:10.1080/10426500008045245
日期:2000.1
Abstract A new one-pot synthesis of 4-methylthio-N-aryl-2-pyridones and their deazapurine analogues by the reaction of ketene dithioacetals with substituted acetanilides have been reported.