1858-14-6Relevant academic research and scientific papers
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.
Selective rhenium-catalyzed oxidation of secondary alcohols with methyl sulfoxide in the presence of ethylene glycol, a convenient one-pot synthesis of ketals
Arterburn, Jeffrey B.,Perry, Marc C.
, p. 769 - 771 (2008/02/12)
Formula presented Secondary alcohols are oxidized preferentially by DMSO and the catalyst ReOCl3(PPh3)2 in the presence of ethylene glycol and refluxing toluene, producing the corresponding ketals. The reactions are rapid, and proceed in very good to excellent yields. The byproducts of the reaction, methyl sulfide and water, are easily removed. No epoxidation or other common side reactions were observed. This direct oxidative transformation of alcohols to the protected ketal derivatives should have broad synthetic applicability.
A new selective catalytic acetalization method promoted by microwave irradiation
Kalita, Dipok J.,Borah, Ruli,Sarma, Jadab C.
, p. 4573 - 4574 (2007/10/03)
A new selective method of acetalization of aldehydes and cyclic ketones with 1,2-diols or alcohols catalyzed by iodine under microwave irradiation is reported.
Montmorillonite Clay Catalysis. Part 2. 1 An Efficient and Convenient Procedure for the Preparation of Acetals catalysed by Montmorillonite K-10
Li, Tong-Shuang,Li, Sheng-Hui,Li, Ji-Tai,Li, Hui-Zhang
, p. 26 - 27 (2007/10/03)
Acetalization of aldehydes and ketones is catalysed by montmorillonite K-10 in refluxing benzene or toluene in excellent yields.
Synthetic models for transmembrane channels: Structural variations that alter cation flux
Murillo, Oscar,Watanabe, Shigeru,Nakano, Akio,Gokel, George W.
, p. 7665 - 7679 (2007/10/03)
Twelve novel bis- or tris(macrocyclic) compounds have been designed as models for cation-conducting channels that function in phospholipid bilayer vesicle membranes. In general, the channel model systems have the structure "sidearm-crown-spacer-crown-spac
A New Ready, High-Yielding, General Procedure for Acetalization of Carbonyl Compounds
Caputo, Romualdo,Ferreri, Carla,Palumbo, Giovanni
, p. 386 - 389 (2007/10/02)
Carbonyl compounds are smoothly and rapidly acetalized by treatment with alcohols, in anhydrous acetonitrile, in the presence of polystyryl diphenyl phosphine - iodine complex as catalyst.Open and cyclic acetals, including 1,3-dioxolanes, 1,3-oxathiolanes, and 1,3-dithiolanes, of miscellaneous aldehydes and ketones have been successfully prepared in this way.The isolation of the product is very easily performed, by simple filtration of the polymer-linked phosphine oxide which is formed in the reaction.
