68630-10-4Relevant academic research and scientific papers
Base-catalysed [3 + 2] cycloaddition of propargylamines and aldehydes to substituted furans
Shen, Jinhai,Zhao, Jing,Hu, Bing,Chen, Yangxin,Wu, Longqiao,You, Qihua,Zhao, Li
, p. 600 - 603 (2018/02/14)
A base-catalysed [3 + 2] cycloaddition reaction of propargylamines and aldehydes for the regiospecific synthesis of substituted furans under metal-free conditions is developed. Propargylamines are used as allenyl anion equivalents and applied in [3 + 2] cycloaddition reactions with aldehydes. Various substituted furans are provided up to 91% yield for 28 examples.
X-ray Absorption and Electron Paramagnetic Resonance Guided Discovery of the Cu-Catalyzed Synthesis of Multiaryl-Substituted Furans from Aryl Styrene and Ketones Using DMSO as the Oxidant
Wu, Yong,Huang, Zhiyuan,Luo, Yi,Liu, Dong,Deng, Yi,Yi, Hong,Lee, Jyh-Fu,Pao, Chih-Wen,Chen, Jeng-Lung,Lei, Aiwen
supporting information, p. 2330 - 2333 (2017/05/12)
The first example of DMSO serving not only as a solvent but also as an oxidant to promote the oxidation of Cu(I) to Cu(II) has been demonstrated. X-ray absorption and electron paramagnetic resonance evidence revealed a single-electron redox process where DMSO could oxidize Cu(I) to Cu(II). The novel discovery guided the rational design of copper-catalyzed oxidative cyclization of aryl ketones with styrenes to furans, providing a new method for the synthesis of multiaryl-substituted furans from cheap and readily available starting materials.
A co-operative effect of visible light photo-catalysis and CoFe2O4 nanoparticles for green synthesis of furans in water
Verma, Fooleswar,Singh, Puneet K.,Bhardiya, Smita R.,Singh, Manorama,Rai, Ankita,Rai, Vijai K.
supporting information, p. 4937 - 4942 (2017/07/12)
A novel approach to poly-functionalized furan synthesis is disclosed via oxidative decarboxylative [3+2] cycloaddition using co-operative catalysis by visible light and CoFe2O4 nanoparticles under ambient reaction conditions with water as a solvent. Although the reported method is efficient without catalyst in the presence of visible light (70% yield in 4 h at rt), the use of catalyst not only increases the yield (91%) but also accelerates the conversion rate (2 h at rt).
Regioselective Synthesis of Multisubstituted Furans via Copper-Mediated Coupling between Ketones and β-Nitrostyrenes
Ghosh, Monoranjan,Mishra, Subhajit,Hajra, Alakananda
, p. 5364 - 5368 (2015/05/27)
A copper-mediated intermolecular annulation of alkyl ketones and β-nitrostyrenes has been developed for the regioselective synthesis of multisubstituted furan derivatives in good yields. This protocol is applicable to both cyclic and acyclic ketones. (Che
Copper-catalyzed regioselective synthesis of furan via tandem cycloaddition of ketone with an unsaturated carboxylic acid under air
Ghosh, Monoranjan,Mishra, Subhajit,Monir, Kamarul,Hajra, Alakananda
, p. 309 - 314 (2015/01/16)
A catalytic decarboxylative annulation has been developed for the regioselective synthesis of trisubstituted furans by the cycloaddition of ketones with α,β-unsaturated carboxylic acids under ambient air. A library of furan derivatives were obtained in good yields from the readily available substrates in the combination of a catalytic amount of Cu-salt and a stoichiometric amount of water. Water plays a crucial role in this catalytic transformation. This journal is
Influence of Wavelength on the Photochemistry of Triarylbenzofurodioxin Derivatives
Horspool, William M.,Khalaf, Abedawn I.
, p. 1147 - 1152 (2007/10/02)
The u.v. irradiation of a number of triarylfurobenzodioxins has been carried out at both λ >280 nm and at 254 nm.The outcome of the reaction is to some extent dependent both on the substitution pattern on the bridgehead (9a) aryl group and on the waveleng
Facile Synthesis of Furans From 2-Ene-1,4-diones by Diphosphorus Tetraiodide
Demirdji, S. H.,Haddadin, M. J.,Issidorides, C. H.
, p. 495 - 496 (2007/10/02)
Diphosphorus tetraiodide effects reductive ring-closure of a variety of 2-ene-1,4-diones into furans within a few minutes at room temperature.
SUBSTITUENT AND WAVELENGHT EFFECT IN THE PHOTOCHEMISTRY OF 5,6,7,8-TETRACHLORO-3a,9a-DIHYDRO-2,3,9a-TRIARYLFURO(2,3-b)(1,4)BENZODIOXIN DERIVATIVES
Horspool, William M.,Khalaf, Abedawn I.
, p. 3745 - 3748 (2007/10/02)
A study of the photoreactions of some triarylfurobenzodioxin derivatives has shown that the outcome is dependent on the type and position of the substitution on the 9a-aryl group.A wavelenght dependence is also reported.
