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C2 symmetrical nickel complexes derived from a-amino amides as efficient catalysts for the enantioselective addition of dialkylzinc reagents to aldehydes

Escorihuela Fuentes, Jorge; Altava Benito, Belén; Burguete Azcarate, Mª Isabel; Luis Lafuente, Santiago (Elsevier, 2013-01-14)

[EN] A series of C2 symmetrical 1:2 Ni:L complexes derived from a-amino amides were studied for the enantioselective addition of dialkylzinc reagents to aldehydes. Different structural elements on the ligands seem to play ...
Catalytic Asymmetric Formal [3+2] Cycloaddition of 2-Isocyanatomalonate Esters and Unsaturated Imines: Synthesis of Highly Substituted Chiral g-Lactams

Espinosa, Miguel; Blay, Gonzalo; Cardona, Luz; Muñoz Roca, María Del Carmen; Pedro, José R. (John Wiley & Sons, 2017-10-20)

[EN] Unlike their isocyano and isothiocyanato analogues, isocyanato esters remain almost unexplored as formal 1,3-dipoles in asymmetric catalytic reactions. The first asymmetric formal [3+2] cycloaddition involving ...
Lanthanum-pyBOX complexes as catalysts for the enantioselective conjugate addition of malonate esters to beta-gamma-unsaturated alfa-ketimino esters

Espinosa, M.; Blay, G.; Cardona, L.; Fernández, I.; Muñoz Roca, María Del Carmen; Pedro, J.R. (Taylor & Francis, 2018)

[EN] In this paper, we report the application of chiral complexes of La(III) with pyBOX ligands as Lewis acid catalysts in the conjugate addition of malonic esters to N-tosyl imines derived from ß,gamma-unsaturated alfa-keto ...
Role of association in chiral catalysis: from asymmetric synthesis to spin selectivity

Ageeva, A.A.; Khramtsova, E.A.; Magin, I.M.; Purtov, P.A.; Miranda Alonso, Miguel Ángel; Leshina, T.V. (John Wiley & Sons, 2018-12-12)

[EN] The origin of biomolecules in the pre-biological period is still a matter of debate, as is the unclarified nature of the differences in enantiomer properties, especially for the medically important activity of chiral ...
Trimeprazine is enantioselectively degraded by an activated sludge in ready biodegradability test conditions

Escuder-Gilabert, Laura; Martin-Biosca, Y.; Perez-Baeza, Mireia; Sagrado, Salvador; Medina-Hernandez, Maria Jose (Elsevier, 2018)

[EN] A great number of available pharmaceuticals are chiral compounds. Although they are usually manufactured as racemic mixtures, they can be enantioselectively biodegraded as a result of microbial processes. In this ...

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Browsing by Subject "Enantioselectivity"

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Browsing by Subject "Enantioselectivity"