129917-45-9Relevant articles and documents
99.Transferts d'hydrogenes dans les cations radicaux ethylene-acetals derives de cyclopentanones et cyclohexanones
Audier, H. E.,Tabet, J. C.,Fetizon, M.
, p. 903 - 911 (1985)
Hydrogen Transfer during Decompositions of Molecular Ions of Acetals Derived from Substituted Cyclopentanones and Cyclohexanones.The isomerisation process of ethylene-acetal radical ions of low internal energy has been reinvestigated in more detail .The ring contraction of cyclohexane derivatives into methylcyclopentanes is quite general for these ions.The relative rates of H transfers to the C free resulting from C-C cleavage α to the acetal group plays the most important part in the mechanism.
A remarkable iodine-catalyzed protection of carbonyl compounds
Banik, Bimal K.,Chapa, Marin,Marquez, Jocabed,Cardona, Magda
, p. 2341 - 2343 (2005)
We report here a remarkably simple molecular iodine-catalyzed protection method for various carbonyl compounds as ketals in a general reaction. The iodine-catalyzed reaction of mandelic acid and lactic acid with several aldehydes has furnished a highly diastereoselective synthesis of cis and trans dioxolanones.
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Sulzbacher et al.
, p. 2827 (1948)
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Sulfonated charcoal, a mild and efficient reagent for the preparation of cyclic acetals, dithioacetals and benzodioxepines
Patney, Haris K.
, p. 413 - 416 (1991)
1,3-Dioxolanes, 1,3-Ditholanes and 1,5-dihydro-3H-2,4-benzodioxepines were prepared by the direct condensation of carbonyl compounds with 1,2-ethanediol, 1,2-ethanedithiol or 1,2-benzenedimethanol under the heterogeneous conditions of sulfonated charcoal catalyst.
Stereoselective synthesis of tertiary ethers through geometric control of highly substituted oxocarbenium ions
Liu, Lei,Floreancig, Paul E.
supporting information; experimental part, p. 5894 - 5897 (2010/12/18)
Fully substituted, fully controlled I The geometries of 1,1-disubstituted oxocarbenium ions and the conformations of oxocarbenium ions that contain a tertiary stereocenter can be predicted based on simple models. These models have been applied to highly stereoselective syntheses of tetrahydropyran derivatives that contain tertiary ethers (see scheme; RL, Rs, and RN represent large, small, and nucleophilic groups, respectively). (Figure Presented)
1,3-Dioxolanes from carbonyl compounds over zeolite HSZ-360 as a reusable, heterogeneous catalyst
Ballini, Roberto,Bosica, Giovanna,Frullanti, Bettina,Maggi, Raimondo,Sartori, Giovanni,Schroer, Frank
, p. 1615 - 1618 (2007/10/03)
Carbonyl compounds are converted, in good yields, into their 1,3-dioxolanes over zeolite HSZ-360, as a new reusable catalyst. Good chemoselectivity is also observed.
