158732-39-9Relevant academic research and scientific papers
Lewis base activation of Lewis acids: Catalytic, enantioselective addition of silyl ketene acetals to aldehydes
Denmark, Scott E.,Beutner, Gregory L.,Wynn, Thomas,Eastgate, Martin D.
, p. 3774 - 3789 (2007/10/03)
The concept of Lewis base activation of Lewis acids has been reduced to practice for catalysis of the aldol reaction of silyl ketene acetals and silyl dienol ethers with aldehydes. The weakly acidic species, silicon tetrachloride (SiCl4), can b
Lewis base activation of Lewis acids. Vinylogous aldol reactions
Denmark, Scott E.,Beutner, Gregory L.
, p. 7800 - 7801 (2007/10/03)
A highly regioselective vinylogous aldol reaction catalyzed by SiCl4 and a chiral phosphoramide (R,R)-5, providing δ-hydroxy enones for a variety of aldehyde and dienol ether structures, has been developed. Low catalyst loadings (1 mol %) can b
To probe the origin of activation effect of carboxylic acid and (+)-NLE in tridentated titanium catalyst systems
Yuan, Yu,Li, Xin,Sun, Jie,Ding, Kuiling
, p. 14866 - 14867 (2007/10/03)
The activation effect of carboxylic acid and positive nonlinear effect ((+)-NLE) in tridentated titanium catalyst systems for hetero Diels-Alder reaction and aldol-type reactions has been first elucidated on the basis of X-ray crystal structural analysis
Use of 1,3-dioxin-4-ones and related compounds in synthesis. XLIV. Asymmetric aldol reaction of 4-trimethylsiloxy-6-methylene-1,3-dioxines: Use of tartaric acid-derived (acyloxy)borane complex as the catalyst
Sato,Sunami,Sugita,Kaneko
, p. 839 - 845 (2007/10/02)
A novel enantioselective synthesis of 1,3-dioxin-4-ones having a 2-hydroxylated alkyl group at the 6-position has been accomplished by chiral tartaric acid-derived acylborane-mediated aldol condensation of the silyl enol ether derived from 6-methyl-derivatives of 1,3-dioxin-4-one with achiral aldehydes.
