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Relevant academic research and scientific papers

Mesoporous aluminosilicate-catalyzed Mukaiyama aldol reaction of aldehydes and acetals

A mesoporous aluminosilicate (Al-MCM-41) was found to be an effective heterogeneous catalyst for the reaction of both aldehydes and acetals with silyl enol ethers or ketene silyl acetals to give the corresponding aldol adducts in moderate to high yields. The remarkable high catalytic activity of Al-MCM-41 over amorphous silica-alumina and aluminum-free mesoporous silicate was observed in the reaction. The solid acid catalyst could be recovered easily by filtration and the recovered catalyst was reusable in the same reactions without a significant loss of catalytic activity.

Direct use of esters in the Mukaiyama aldol reaction: A powerful and convenient alternative to aldehydes

An indium triiodide catalyst promoted the direct transformation from esters to β-hydroxycarbonyl compounds using hydrosilanes and silyl enolates by a one-stage process. Various esters were applicable, and the high chemoselectivity of this system brings compatibility to many functional groups: alkenyl, alkynyl, chloro, and hydroxy.

Chemoselective aldol reaction of silyl enolates catalyzed by Mgl2 etherate

(matrix presented) Mukaiyama-type aldol coupling of typical silyl enolates 2-4 with aryl or vinyl aldehydes and acetals was realized in the presence of 1-5 mol % of MgI2 etherate (1) in a mild, efficient, and highly chemoselective manner. Iodid

Bismuth(III) Triflate: A Water-Stable Equivalent of Trimethylsilyl Triflate for the Catalysis of Mukaiyama Aldol Reactions

Bismuth tris-trifluoromethanesulfonate (1) has been found to be an efficient catalyst for the Mukaiyama aldol-type reactions.The catalytic activity of this catalyst is higher than the one previously reported for the rare earth triflates M(OTf)3 (M = Sc, L

Aminium salt promoted catalytic substitution reactions of acetals with silylated nucleophiles

A catalytic amount of tris(p-bromophenyl)aminium hexachloroantimonate promoted the substitution reactions of dimethylacetals with various silylated nucleophiles through an electron transfer mechanism. Silyl compounds include silyl enol ether, ketene silyl

Pyrylium salt promoted substitution reactions of acetals with various silylated nucleophiles

Catalytic amounts of triarylpyrylium salts photochemically and thermally promoted the substitution reactions of dimethyl acetals with silylated nucleophiles.

Lanthanide trifluoromethanesulfonates as reusable catalysts: Aldol reactions in organic solvents

The aldol reaction of silyl enolates with aldehydes or acetals using a lanthanide trifluoromethanesulfonate as catalyst smoothly proceed in organic solvents to afford the corresponding aldol-type adducts in high yields. The catalyst can be easily recovere

Efficient Activation of Acetals, Aldehydes, and Imines toward Silylated Nucleophiles by the Combined Use of Catalytic Amounts of 2 and TMS-CN under Almost Neutral Conditions

In the presence of catalytic amount of a transition metal compound such as 2, Co(acac)2, or NiCl2, trimethylsilyl cyanide smoothly reacts with acetals to form α-methoxy carbonitriles in good yields.In the coexistence of catalytic amounts of Rh