Sequential Brønsted acid promoted amination/annulation/aromatization of β‐(2‐aminophenyl)‐α,β‐ynones with cyclic α‐methylene carbonyl compounds has been developed for the synthesis of polycyclic quinolines in good to high yields in ethanol. The protocol achieves the selective formation of the target quinolines and is expected to find practical applications due to its operational simplicity.
A facile and rapid route for the synthesis of Cu/Cu<sub>2</sub>O nanoparticles and their application in the Sonogashira coupling reaction of acyl chlorides with terminal alkynes
作者:Manohar A. Bhosale、Takehiko Sasaki、Bhalchandra M. Bhanage
DOI:10.1039/c4cy00868e
日期:——
solvent. The 1,3-propanediol plays multiple roles in the reaction including solvent, reactant, promoter and capping agent, and there is no need for any other additives. A structural and morphological study of the Cu/Cu2O NPs was carried out using XRD, FEG-SEM, EDS, TEM, FT-IR, DSC-TGA and TPR techniques. This is one of the simpler, faster, less expensive and greener approaches for the synthesis of nanocrystalline
我们已经证明了通过微波方法制备Cu / Cu 2 O纳米颗粒(NPs)的简便的一步合成策略。微波能量是合成Cu / Cu 2 O NPs的驱动力,这使该过程经济。在当前方法中,使用乙酸铜(II)作为前体和1,3-丙二醇作为溶剂,在三分钟内合成了Cu / Cu 2 O NP 。1,3-丙二醇在反应中起多种作用,包括溶剂,反应物,促进剂和封端剂,并且不需要任何其他添加剂。Cu / Cu 2的结构和形态研究使用XRD,FEG-SEM,EDS,TEM,FT-IR,DSC-TGA和TPR技术进行O NP。这是用于合成纳米晶体Cu / Cu 2 O的更简单,更快,更便宜和更环保的方法之一。此外,纳米晶体Cu / Cu 2 O在炔烃与酰氯的Sonogashira偶联反应中显示出出色的催化活性。
An Improved Environmentally Friendly Approach to 4-Nitro-, 4-Sulfonyl-, and 4-Aminoquinolines and 4-Quinolones through Conjugate Addition of Nucleophiles to β-(2-Aminophenyl)-α,β-ynones
led to valuable 4-sulfonylquinolines and 4-nitroquinolines. The latter proved to be versatile precursors of N-unsubstituted 4-aminoquinolines and 4-quinolones. Reaction of β-(2-aminophenyl)-α,β-ynones with DMF/NaOH resulted in the formation of 4-(dimethylamino)quinolines. The use of an alternative CO-free procedure for the preparation of substrates β-(2-aminophenyl)-α,β-ynones allowed extension of the
TBAF‐Catalyzed Tandem Synthesis of Triazolo[4,5‐
<i>c</i>
]quinolines at Ambient Temperature
作者:Nan Sun、Han Yang、Kai Zheng、Liqun Jin、Baoxiang Hu、Zhenlu Shen、Xinquan Hu
DOI:10.1002/ejoc.202001280
日期:2020.11.22
1H‐[1,2,3]triazolo[4,5‐c]quinolines have been developed based on tandem TBAF‐catalyzed intermolecular azide‐alkyne [3+2] cycloaddition of β‐(2‐aminoaryl)‐α,β‐ynones and TMS‐N3, followed by intramolecular dehydration annulation reaction. This transformation can smoothly proceed at ambient temperature to provide a broad range of functionalized 1H‐[1,2,3]triazolo[4,5‐c]quinolines in up to 95 % yield in
基于串联TBAF催化的分子间叠氮化物-炔烃[3 + 2]环加β-(),开发了一种高效且无金属的1 H- [1,2,3]三唑并[4,5- c ]喹啉。 2-氨基芳基)-α,β-炔酮和TMS-N 3,然后进行分子内脱水环化反应。这种转化可以在环境温度下平稳地进行,以提供32个实例中高达95%的收率的多种功能化1 H- [1,2,3]三唑[4,5- c ]喹啉。
Bio-Inspired Fragmentations: Rapid Assembly of Indolones, 2-Quinolinones, and (−)-Goniomitine
作者:Haokun Li、Peng Cheng、Long Jiang、Jin-Liang Yang、Liansuo Zu
DOI:10.1002/anie.201611830
日期:2017.3.1
goniomitine, new synthetic bio‐inspired fragmentation strategies for the synthesis of functionalized 2‐quinolinones and indolones have been developed. Remarkable synthetic efficiency was achieved by telescoping several transformations into one‐pot reactions, allowing for the direct coupling of 2‐alkynyl‐anilines and diazo ketones. The synthetic utility was demonstrated by the 5‐step asymmetric total synthesis