33662-99-6Relevant academic research and scientific papers
Reaction of 2-Alkyl-2-phenyl-1,3-dioxolans with Iodine Monochloride: Formation of α-Phenylalkanoate Esters
Goosen, Andre,McCleland, Cedric W.
, p. 1311 - 1312 (1982)
2-Alkyl-2-phenyl-1,3-dioxolans undergo a high-yield transformation into 2-chloroethyl α-phenylalkanoates upon treatment with iodine monochloride in dichloromethane.
C-C bond formation strategy through ecocatalysis: Insights from structural studies and synthetic potential
Garel, Claire,Renard, Brice-Lo?c,Escande, Vincent,Galtayries, Anouk,Hesemann, Peter,Grison, Claude
, p. 272 - 286 (2015/10/05)
We report the elaboration of novel bio-sourced ecocatalysts for Heck and Suzuki cross-coupling reactions. Ecocatalysis is based on the recycling of metals issued from phytoremediation or rehabilitation, and an innovative chemical valorization of the subsequent biomass in the field of catalysis. Here, we describe the efficient palladium accumulation by plants (Brassica juncea, Lolium multiflorum) via rhizofiltration. Taking advantage of the remarkable ability of the selected plants to accumulate Pd(II) species into their roots, these latter can be directly used for the preparation of ecocatalysts, called Eco-Pd. The formed Eco-Pd catalysts are thoroughly characterized via ICP-MS, XRD, XPS, TEM, SEM in order to elucidate the chemical composition and morphology of the formed materials. Significant differences to conventional Pd-based catalysts such as palladium(II) chloride can principally be related to a particular Lewis acid behavior of the Eco-Pd catalysts. Finally, the obtained Eco-Pd appear as highly active catalysts in Heck and Suzuki cross-coupling reactions necessitating considerably lower Pd quantity compared to precedently reported bio-sourced palladium containing catalysts.
Probing the lewis acidity and catalytic activity of the metal-organic framework [Cu3(btc)2] (BTC = Benzene-1,3,5-tricarboxylate)
Alaerts, Luc,Seguin, Etienne,Poelman, Hilde,Thibault-Starzyk, Frederic,Jacobs, Pierre A.,De Vos, Dirk E.
, p. 7353 - 7363 (2007/10/03)
An optimized procedure was designed for the preparation of the microporous metal-organic framework (MOF) [Cu3(btc)2] (BTC = benzene-1,3,5-tricarboxylate). The crystalline material was characterized by X-ray diffraction, optical microscopy, SEM, X-ray photoelectron spectroscopy, N2 sorption, thermogravimetry, and IR spectroscopy of adsorbed CO. CO adsorbs on a small number of Cu2O impurities, and particularly on the free CuII coordination sites in the framework. [Cu 3(btc)2] is a highly selective Lewis acid catalyst for the isomerization of terpene derivatives, such as the rearrangement of α-pinene oxide to campholenic aldehyde and the cyclization of citronellal to isopulegol. By using the ethylene ketal of 2-bromopropiophenone as a test substrate, it was demonstrated that the active sites in [Cu3(btc) 2] are hard Lewis acids. Catalyst stability, re-usability, and heterogeneity are critically assessed.
