73867-62-6Relevant academic research and scientific papers
Selective Copper-N-Heterocyclic Carbene (Copper-NHC)-Catalyzed Aerobic Cleavage of β-1 Lignin Models to Aldehydes
Zhou, Zhong-Zhen,Liu, Mingxin,Li, Chao-Jun
, p. 3344 - 3348 (2017/06/09)
As fossil resources are undergoing fast depletion, the harvesting of sustainable aromatic compounds from biorenewable lignin has become highly appealing nowadays. However, the development of efficient catalysts for lignin depolymerization to high value-added chemicals is challenging. In this paper, a selective copper-N-heterocyclic carbene (copper-NHC)-catalyzed aerobic cleavage is reported for β-1 lignin model compound, which represents an important family of natural wood lignin. Using this catalyst system, the cleavage of β-1 model compounds gave >99% conversions and satisfactory yields of the corresponding aldehydes, which can serve as versatile starting materials for the chemical industry.
Synthesis of highly functionalized 9,10-phenanthrenequinones by oxidative coupling using MoCl5
Trosien, Simon,Waldvogel, Siegfried R.
supporting information; experimental part, p. 2976 - 2979 (2012/07/27)
The strong oxidative power of molybdenum pentachloride gives rise to an efficient oxidative C-C bond formation of benzil derivatives to the corresponding 9,10-phenanthrenequinones. A highly complementary method to previous approaches was developed. The required derivatives are accessible in a modular fashion and in excellent yields. By this approach the orchid-derived natural product cypripediquinone A was synthesized for the first time.
Synthesis of unsymmetrically substituted benzils via the Friedel-Crafts reaction of arenes with α-chloro-α-(methylthio)acetophenones
Ishibashi,Matsuoka,Ikeda
, p. 1854 - 1856 (2007/10/02)
Lewis acid-promoted reactions of arenes with α-chloro-α-(methylthio)acetophenones gave the Friedel-Crafts reaction products, which were then treated with 3 molar eq of cupric chloride in aqueous acetone to afford the unsymmetrically substituted benzils.
The Oxidation of (E)-α-Phenylcinnamic Acids with Manganese(III) Acetate
Oishi, Kazuki,Kurosawa, Kazu
, p. 179 - 184 (2007/10/02)
The oxidation of eight (E)-α-phenylcinnamic acids with manganese(III) acetate in boiling acetic acid containing acetic anhydride gave 3-phenylcoumarins, 3-phenyl-1-oxaspirodeca-3,7,9-triene-2,6-diones, 2-phenylbenzofurans, 3-(acetoxymethyl)-2-phenylbenzofurans, 3-formyl-2-phenylbenzofuran, 2-acetoxy-2-phenyl-3(2H)-benzofuranones, (Z)-Α-acetoxystilbenes, 2-acetoxy-1,2-diphenylethanones, 5-acetoxy-4,5-diphenyl-2(5H)-furanones, and diphenylacetylene.Tha reaction pathways are discussed.
