68630-11-5Relevant academic research and scientific papers
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.
Rh/Cu-Catalyzed Cascade [4+2] Vinylic C?H O-Annulation and Ring Contraction of α-Aryl Enones with Alkynes in Air
Zhao, Yinsong,Li, Shiqing,Zheng, Xuesong,Tang, Junbin,She, Zhijie,Gao, Ge,You, Jingsong
supporting information, p. 4286 - 4289 (2017/04/03)
An unprecedented Rh-catalyzed ketone-directed vinylic C?H activation/[4+2] O-annulation of α-aryl enones with internal alkynes followed by a Cu-catalyzed ring contraction in air to provide multiaryl-substituted furan derivatives has been developed. The preliminary mechanism study identifies the active pyrylium salt as the key intermediate.
Successively recycle waste as catalyst: A one-pot wittig/1,4-reduction/paal-knorr sequence for modular synthesis of substituted furans
Chen, Long,Du, Yi,Zeng, Xing-Ping,Shi, Tao-Da,Zhou, Feng,Zhou, Jian
, p. 1557 - 1560 (2015/03/30)
A one-pot tandem Wittig/conjugate reduction/Paal-Knorr reaction is reported for the synthesis of di- or trisubstituted furans. This novel sequence first demonstrates the possibility of successively recycling waste from upstream steps to catalyze downstream reactions.
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.
