937-94-0Relevant academic research and scientific papers
A convenient method for converting hydroxyacetophenones into their ethylene or trimethylene acetals
Ono, Fumiaki,Takenaka, Hirotaka,Fujikawa, Toshikazu,Mori, Masaki,Sato, Tsuneo
experimental part, p. 1318 - 1322 (2009/12/07)
Various types of hydroxyacetophenones are efficiently converted into the corresponding ethylene acetals in the presence of ethane-1,2-diol, triisopropyl orthoformate, and a catalytic amount of cerium(III) trifluoromethanesulfonate under mild reaction conditions. The homologous trimethylene acetals can be also prepared in the same way. Georg Thieme Verlag Stuttgart.
Iridium complex-catalyzed addition of water and alcohols to non-activated terminal alkynes
Hirabayashi, Tomotaka,Okimoto, Yoshio,Saito, Akiyo,Morita, Masao,Sakaguchi, Satoshi,Ishii, Yasutaka
, p. 2231 - 2234 (2007/10/03)
The addition of water and alcohols to non-activated terminal alkynes was found to be promoted by an iridium complex combined with Lewis acid and phosphite. Thus, terminal alkynes reacted with water or alcohols to give ketones or ketals, respectively, in good to excellent yields. α,ω-Diyne like 1,7-octadiyne was converted into 1-(2-methyl-cyclopent-1-enyl)ethanone through the intramoleculer aldol condensation of the resulting 2,7-octanedione induced by Lewis acid.
Highly efficient heterogeneous acetalization of carbonyl compounds catalyzed by a titanium cation-exchanged montmorillonite
Kawabata, Tomonori,Mizugaki, Tomoo,Ebitani, Kohki,Kaneda, Kiyotomi
, p. 8329 - 8332 (2007/10/03)
The titanium cation-exchanged montmorillonite efficiently catalyzed the selective acetalization of various carbonyl compounds as a recyclable solid acid. This heterogeneous catalyst has an advantage of a strikingly simple workup procedure over conventional homogeneous acids.
Distannoxane-catalyzed acetilization of carbonyls
Otera, Junzo,Dan-oh, Nobuhisa,Nozaki, Hitosi
, p. 1449 - 1456 (2007/10/02)
1,3-Disubstituted tetrabutyldistannoxanes catalyze acetilization of carbonyl compounds under mild conditions. Thorough investigations of factors influencing this reaction are given. A variety of synthetically useful carbonyl compounds are efficiently converted to acetals. In particular, acetilization of cyclic α,β-unsaturated ketones is readily achieved which have met with only limited success so far.
THE RELATIVE REACTIVITY OF 2-METHYL-1,3-DIOXOLANE IN RADICAL REACTION WITH UNSATURATED COMPOUNDS
Ryabinina, T. A.,Kruglov, D. E.,Pastushenko, E. V.,Terent'ev, A. B.
, p. 602 - 605 (2007/10/02)
The reactivity of 2-methyl-1,3-dioxolan-2-yl radicals toward α-olefins containing substituents with various polarities was studied.There is a substantial increase in the relative addition rate constant in the series consisting of vinyl butyl ether, 1-hexene, vinyl acetate, trimethylvinylsilane, methyl acrylate, and acrylonitrile.This indicates that the 2-methyl-1,3-dioxolan-2-yl radicals have clearly defined nucleophilic character.
Sulfonated charcoal, a mild and efficient reagent for the preparation of cyclic acetals, dithioacetals and benzodioxepines
Patney, Haris K.
, p. 413 - 416 (2007/10/02)
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.
ELECTROGENERATED ACID AS AN EFFICIENT CATALYST FOR ACETYLIZATION OF CARBONYL GROUP WITH 1,2-BISTRIMETHYLSILOXYETHANE
Torii, Sigeru,Inokuchi, Tsutomu
, p. 1349 - 1350 (2007/10/02)
Electrolysis of a mixture of carbonyl compounds and bistrimethylsiloxyethane in CH2Cl2-LiClO4-(Pt) readily gave the corresponding acetalized products in good yields.
HOMOLYTIC ADDITION OF 1,3-DITHIOLANES AND 1,3-OXATHIOLANES TO 1-HEXENE
Batyrbaev, N. A.,Zorin, V. V.,Zlot-skii, S. S.,Rakhmankulov, D. L.
, p. 1727 - 1729 (2007/10/02)
In the presence of tert-butyl peroxide at 150 deg C 1,3-dithiolane and 2-methyl-1,3-dithiolane add to 1-hexene, forming 2-hexyl-1,3-dithiolane and 2-methyl-2-hexyl-1,3-dithiolane respectively.Under these conditions 1,3-oxathiolane and 2-methyl-1,3-oxathiolane form 2-hexyl-1,3-oxathiolane and octyl thioformate and 2-methyl-2-hexyl-1,3-oxathiolane and octyl thioacetate respectively.
