Results 91 to 100 of about 32,089 (279)

Enantioselectivity of lipases : Effects of water activity

, 1997
The enantioselectivity (E) of lipases in esterifications of secondary alcohols with decanoic acid was studied in organic media. The enantioselectivity of 2-octanol differed greatly among the lipases used. Candida antarctica lipase was extremely selective
Wehtje, Ernst, Costes, David, David Costes, Adlercreutz, Patrick, Ernst Wehtje, Patrick Adlercreutz, Adlercreutz, Patrick,   +6 more
core   +1 more source

Enhanced enantioselectivity in halogen-bonding catalysis

, 2023
Chiral halogen-bonding catalysts have emerged as a new approach towards asymmetric catalysis, but enantioselectivities have thus far remained low. Now, fine-tuning the substrate–catalyst halogen–halogen interactions is shown to significantly enhance ...
Victoria Richards
core   +1 more source

A Comparative Study of C₂-Symmetric and C₁-Symmetric Hydroxamic Acids in Vanadium-Catalyzed Asymmetric Epoxidation of Allylic Alcohols

Molecules
Hydroxamic acids are emerging as versatile chiral ligands for metal-catalyzed asymmetric oxidations due to their tunable electronic and steric environments.
Marco Valtierra-Galván, Alfredo Rodríguez-Hernández, Israel Bonilla-Landa, Felipe Barrera-Méndez, Francisco Javier Enríquez-Medrano, Ramón Enrique Díaz de León-Gómez, José Luis Olivares-Romero   +6 more
doaj   +1 more source

Evaluation of the Impact of Flutriafol on Soil Culturable Microorganisms and on Soil Enzymes Activity

Agriculture
Fungicides play a role in managing plant diseases but raise concerns about environmental impact, emphasizing the need to understand and minimize their effects on non-target ecosystems. Flutriafol is a fungicide used to combat fungal diseases in crops. It
Diana-Larisa Roman, Mariana Adina Matica, Bianca-Vanesa Boros, Constantina-Bianca Vulpe, Adriana Isvoran   +4 more
doaj   +1 more source

Inter- and intramolecular enantioselective carbolithiation reactions

Beilstein Journal of Organic Chemistry, 2013
In this review we summarize recent developments in inter- and intramolecular enantioselective carbolithiation reactions carried out in the presence of a chiral ligand for lithium, such as (−)-sparteine, to promote facial selection on a C=C bond.
Asier Gómez-SanJuan, Nuria Sotomayor, Esther Lete   +2 more
doaj   +1 more source

Research Progress on the Selectivity and Biomagnification of Chiral Hexabromocyclododecanes Pollutants in Food Chain Transfer

Yankuang ceshi, 2016
Hexabromocyclododecanes (HBCDs) are globally produced brominated flame retardant (BFR) and are used primarily as an additive FR in thermal insulation building materials, upholstery textiles, and electronics.
TIAN Qin, TONG Ling, SONG Shu-ling, ZHAN Nan, PAN Meng, QIU Jing   +5 more
doaj   +1 more source

The influence of water activity on the enantioselectivity in the enzyme- catalyzed reduction of 2-pentanone

, 1998
The stereoselective reduction of 2-pentanone by alcohol dehydrogenase from Thermoanaerobium brockii was studied at controlled water activity and at different reaction temperatures.
Wehtje, Ernst, Mattiasson, Bo, Adlercreutz, Patrick, Jönsson, Åsa, Van Breukelen, Willem, Van Breukelen, Willem,, Adlercreutz, Patrick,, Bo Mattiasson, Willem van Breukelen, Ernst Wehtje, Åsa Jönsson, Patrick Adlercreutz   +11 more
core   +1 more source

Increase enantioselectivity of reactions with pressure

, 1997
The enantioselectivity of some model ketones using various strain of the yeast was ...
MEDICI, Alessandro
core  

A metal-DNA biohybrid as enantioselective artificial photoDNAzyme

Nature Communications
Visible light photocatalysis, which exploits the reactivity of molecules at their excited state, has triggered a paradigm shift in organic synthesis by enabling some very unique chemical transformations.
Zachary Pastorel, Juliette Zanzi, Mathieu Noël, Alessio Bartocci, Stellios Arseniyadis, Elise Dumont, Yves Canac, Olivier Baslé, Michael Smietana   +8 more
doaj   +1 more source

Pathways for Stereoinformation Transfer:  Enhanced Enantioselectivity via Diastereomeric Recycling of Organolithium/(−)-Sparteine Complexes

, 2016
Pathways for Stereoinformation Transfer:  Enhanced Enantioselectivity via Diastereomeric Recycling of Organolithium/(−)-Sparteine ...
Amit Basu (537997), Peter Beak (2402176), Donald J. Gallagher (2374648)   +2 more
core   +1 more source