1728-38-7Relevant academic research and scientific papers
Synthesis of peroxide compounds by the BF3-catalyzed reaction of acetals and enol ethers with H2O2
Terent'ev,Kutkin,Platonov,Vorontsov,Antipin,Ogibin,Nikishin
, p. 681 - 687 (2004)
Aliphatic and alicyclic gem-bis-hydroperoxides and their derivatives, bis(1-hydroperoxycycloalkyl) and bis(1-hydroperoxyalkyl) peroxides, dispiro- and tetraalkyl-1,2,4,5-tetroxanes were synthesized by the reaction of aliphatic and alicyclic acetals and enol ethers with H2O2 in the presence of BF3 in anhydrous Et2O.
Pt nanoparticle supported on nanocrystalline CeO2: Highly selective catalyst for upgradation of phenolic derivatives present in bio-oil
Sarkar, Bipul,Pendem, Chandrashekar,Konathala, L. N. Sivakumar,Sasaki, Takehiko,Bal, Rajaram
, p. 18398 - 18404 (2015/02/19)
Pt nanoparticle supported on nanocrystalline CeO2 was prepared, and it was found that the catalyst can selectively hydrogenate phenolic derivatives present in bio-oil. The catalyst was characterized by XRD, XPS, ICP-AES, EXAFS, SEM and TEM. TEM micrograms confirm the presence of very small Pt nanoparticles supported on nanocrystalline CeO2. The catalyst was found to be very effective in liquid phase hydrogenation of phenol and phenolic compounds present in bio-oil in the presence of molecular H2. The synergy between the surface and very small Pt particles on the nanocrystalline CeO2 plays the most vital role towards the extremely high catalytic activity of the catalyst. The reusability of the catalyst was tested, and it was found that the catalyst does not exhibit any significant change in its catalytic activity even after five reuses. The catalyst showed ～100% conversion with very high selectivity after 3 h in phenol conversions of 100% with >98% cyclohexanol selectivity achieved after 3 h of reaction at 100 °C in aqueous medium.
Synthesis of Cyclic and Acyclic Enol Ethers (Vinyl Ethers)
Gassman, Paul G.,Burns, Stephen J.,Pfister, Keith B.
, p. 1449 - 1457 (2007/10/02)
A general method has been developed for the conversion of both cyclic and acyclic acetals of cyclic ketones, acyclic ketones, and aldehydes into enol ethers through treatment of the acetal with trimethylsilyl triflate in the presence of N,N-diisopropylethylamine.The range of isolated yields of enol ethers from the various classes of acetals was as follows: cyclic acetals of cyclic ketones, 83-98percent; acyclic acetals of ketones, 72-94percent; acyclic and cyclic acetals of aldehydes, 65-90percent.
Chiral 2,2-Disubstituted Cyclohexanones; Annulation via Claisen Rearrangement Products
Grattan, T. J.,Whitehurst, J. S.
, p. 11 - 18 (2007/10/02)
The methyl enol ether of 2-methylcyclohexanone reacts regiospecifically with the optical active forms of but-3-yn-2-ol and but-3-en-2-ol. (R)-But-3-yn-2-ol yields an approximately 4:1 mixture of (R)-2-methyl-2-(R-buta-1,2-dienyl)cyclohexanone and the corresponding SR compound.By contrast the but-3-en-2-ol reaction is ca. 96percent enantioselective; (R)-but-3-en-2-ol gives (R)-2-(trans-but-2-enyl)-2-methylcyclohexanone and (S)-but-3-en-2-ol gives the corresponding (S)-cyclohexanone.These Claisen rearrangement products have been transformed into Robinson-type annulated ketones.Cleavage of some highly hindered esters has been carried out efficiently by sodium methylsulphinyl-methanide in dimethyl sulphoxide.
General Method for the Synthesis of Enol Ethers (Vinyl Ethers) from Acetals
Gassman, Paul G.,Burns, Stephen J.
, p. 5574 - 5576 (2007/10/02)
A general, high yield method for the synthesis of enol ethers from acetals has been devised that involves treatment of an appropriate acetal with a 10-75percent molar excess of trimethylsilyl triflate and a 20-90percent molar excess of N,N-diisopropylethy
A FACILE PREPARATION OF METHYL ENOL ETHERS FROM ACETALS AND KETALS USING TRIMETHYLSILYL IODIDE
Miller, R.D.,McKean, D.R.
, p. 323 - 326 (2007/10/02)
Acetals and ketals are converted in high yields to the corresponding methyl vinyl ethers by treatment with trimethylsilyl iodide in the presence of hexamethyldisilazane at room temperature or below.
