620-47-3Relevant articles and documents
Continuous flow preparation of iron oxide nanoparticles supported on porous silicates
Yepez, Alfonso,Lam, Frank L. Y.,Romero, Antonio A.,Kappe, C. Oliver,Luque, Rafael
, p. 276 - 282 (2015)
A simple, innovative, and efficient continuous flow methodology for the direct preparation of supported nanoparticles on porous materials by using metal precursor solution flowing through heated packed-bed reactors containing the support material has been developed. The effects of the flow rate of the precursor solution, temperature, and nature of the support material and metal loading have been investigated. Results indicated that optimum conditions comprised short residence times (with typical flow rates of 0.5 mL min-1 and below) under mild heating (100 ?°C) to achieve optimum materials in terms of nanoparticle size and structure and catalytic activity. The support was found to have a remarkable effect on both loading and distribution and agglomeration of nanoparticles in the system, with a previously reported Fe/Al synergy also observed in the prepared nanomaterials, which led to optimum results.
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Brown,Bolto
, p. 3320 (1959)
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No contest: A co-reactant deprived of reactivity
Cornelis, Andre,Dony, Charles,Laszlo, Pierre,Nsunda, Kinkela M.
, p. 2903 - 2904 (1991)
Whereas benzyl chloride is normally more reactive than benzyl alcohol toward aromatic hydrocarbons, at 20°C alkylation of toluene is totally inhibited in the presence of an equimolar mixture of the two benzylating agents and of a clay-based catalyst. At 80°C, all the alcohol molecules are first consumed. Then, and only then, at time T = 45 mn, the chloride molecules start their reaction.
Conversion of Aryl Aldehydes to Benzyl Iodides and Diarylmethanes by H3PO3/I2
Lv, Fang,Xiao, Jing,Xiang, Junchun,Guo, Fengzhe,Tang, Zi-Long,Han, Li-Biao
, p. 3081 - 3088 (2021/02/01)
For the first time, H3PO3 was used as both the reducing reagent and the promotor in the reductive benzylation reactions with aryl aldehydes. By using a H3PO3/I2 combination, various aromatic aldehydes underwent iodination reactions and Friedel-Crafts type reactions with arenes via benzyl iodide intermediates, readily producing benzyl iodides and diarylmethanes in good yields. Intramolecular cyclization reactions also took place, giving the corresponding cyclic compounds. This new strategy features easy-handling, low-cost, and metal-free conditions.
The Dual Role of Benzophenone in Visible-Light/Nickel Photoredox-Catalyzed C?H Arylations: Hydrogen-Atom Transfer and Energy Transfer
Dewanji, Abhishek,Krach, Patricia E.,Rueping, Magnus
supporting information, p. 3566 - 3570 (2019/02/26)
A dual catalytic protocol for the direct arylation of non-activated C(sp3)?H bonds has been developed. Upon photochemical excitation, the excited triplet state of a diaryl ketone photosensitizer abstracts a hydrogen atom from an aliphatic C?H bond. This inherent reactivity was exploited for the generation of benzylic radicals which subsequently enter a nickel catalytic cycle, accomplishing the benzylic arylation.