84235-35-8Relevant academic research and scientific papers
Silica and alumina modified by Lewis acids as catalysts in Diels-Alder reactions of chiral acrylates
Cativiela,Figueras,Garcia,Mayoral,Pires,Royo
, p. 621 - 624 (2007/10/02)
Silica and alumina, modified by treatment with AlClEt2 and TiCl4, are tested as catalysts in the reactions of cyclopentadiene (1) with (-)-methyl acrylate (2a), (R)-O-acryloyl pantolactone (2b) and (S)-O-acryloyl lactate (2c). Silica-modified systems are the most efficient heterogeneous catalysts described to date for this kind of reaction, leading to selectivities similar to those obtained with aluminium homogeneous catalysts. Whereas silica· AlClEt2 is better for the reaction of 2a and 2c, silica· TiCl4 is more suitable for the reaction of 2b.
Effect of clay calcination on clay-catalysed Diels-Alder reactions of cyclopentadiene with methyl and (-)-menthyl acrylates
Cativiela, Carlos,Fraile, Jose M.,Garcia, Jose I.,Mayoral, Jose A.,Pires, Elisabeth,Figueras, Francois,De Menorval, Louis C.
, p. 6467 - 6476 (2007/10/02)
Zn(II) and Fe(III)-exchanged K 10-montmorillonites, activated by several methods, are used as catalysts in the reaction between methyl acrylate and cyclopentadiene. Calcined clays are better catalysts than dried clays. Zn(II) clays, dried and calcined, are compared as catalysts of the asymmetric Diels-Alder reaction between (-)-methyl acrylate and cyclopentadiene. Calcined clay again shows a higher catalytic activity and leads to better percentages of diastereomeric excess. Furthermore, calcined clays are easily recovered with no loss of catalytic properties.
The effect of alumina on the Diels-Alder reactions of cyclopentadiene with menthyl acrylate and dimenthyl fumarate
Kabalka,Pagni,Bains,Hondrogiannis,Plesco,Kurt,Cox,Green
, p. 1283 - 1294 (2007/10/02)
Alumina catalyzes the Diels-Alder reactions of cyclopentadiene with optically active menthyl acrylate and dimenthyl fumarate. Significant diastereoselectivity is observed in each case.
Clay-catalysed asymmetric Diels-Alder reaction of cyclopentadiene with (-)-menthyl acrylate
Cativiela,Figueras,Fraile,Garcia,Mayorall
, p. 953 - 956 (2007/10/02)
Zn(II)-exchanged K10 montmorillonite is shown to be an efficient catalyst for the reaction between cyclopentadiene and (-)-menthyl acrylate, leading to the 1R,2R-cycloadduct with good chemical yield, high % d.e. and excellent endo/exo selectivity.
