Results 101 to 110 of about 27,319 (289)

Development of an organo-and enzyme-catalysed cascade reaction [PDF]

open access: yes, 2010
This thesis describes the development of a novel one-pot reaction (Scheme 1). The reaction combines organo- and enzyme-catalysis in an aldol/aldol cascade for the first time.
Kinnell, Angela Dawn
core  

stereoselectivity

open access: yes, 2014
Citation: 'stereoselectivity' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.S05991 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
openaire   +1 more source

Influência da estrutura do catalisador a base de Zirconoceno na estereorregularidade e propriedades do polipropileno formado Influence of Zirconocene structure on polypropylene stereorregularity and properties

open access: yesPolímeros, 1997
RESUMO: Catalisadores de metalocenos com diferentes simetrias, cocatalisados por metilaluminoxanas (MAO), foram avaliados em diferentes temperaturas de polimerização do propileno.
Mário R. Meneghetti   +2 more
doaj   +1 more source

Synthesis of Chiral Acyclic Pyrimidine Nucleoside Analogues from DHAP-Dependent Aldolases

open access: yesBiomolecules
Dihydroxyacetone phosphate (DHAP)-dependent aldolases catalyze the aldol addition of DHAP to a variety of aldehydes and generate compounds with two stereocenters.
Mariano Nigro   +7 more
doaj   +1 more source

Clay minerals and their gallery guests: an ab initio investigation into their interactions. [PDF]

open access: yes, 2011
Clay minerals are ubiquitous and readily accessible in the natural environment and consequently have become an essential ingredient in the development of Western Society.
GEATCHES, DAWN,LESLEY   +1 more
core  

Stereoselective cyclo-addition reactions of azomethine ylides catalysed by in situ generated Ag(I)/bisphosphine complexes [PDF]

open access: yesJournal of the Serbian Chemical Society, 2010
Stereoselective cyclo-addition reactions of azomethine ylides promoted by in situ generated Ag(I)/bisphosphine complexes were studied. Under the optimised conditions, the pyrrolidine products were isolated in up to 84 % yield and with up to 71 % e.e. The
VLADIMIR SAVIĆ   +2 more
doaj  

The Origin of Stereoselectivity in Proline-Catalyzed Intramolecular Aldol Reactions

open access: yes, 2016
The Origin of Stereoselectivity in Proline-Catalyzed Intramolecular Aldol ...
S. Bahmanyar (2647300)   +1 more
core   +1 more source

Enantiomeric Tartaric Acid Production Using cis-Epoxysuccinate Hydrolase: History and Perspectives

open access: yesMolecules, 2019
Tartaric acid is an important chiral chemical building block with broad industrial and scientific applications. The enantioselective synthesis of l(+)- and d(−)-tartaric acids has been successfully achieved using bacteria presenting cis ...
Jinsong Xuan, Yingang Feng
doaj   +1 more source

Electroenzymatic CO2 Fixation

open access: yesAngewandte Chemie International Edition, EarlyView.
Electroenzymatic CO2 fixation enables energy‐efficient, highly selective synthesis of complex molecules. Unlocking its full potential requires fundamental understanding of electrode‐coupled reductases and carboxylases. This review critically discusses available enzymes, product scope, and key thermodynamic and kinetic considerations, highlighting ...
Leonardo Castañeda‐Losada   +4 more
wiley   +1 more source

A racemic formal total synthesis of clavukerin A using gold(I)-catalyzed cycloisomerization of 3-methoxy-1,6-enynes as the key strategy

open access: yesBeilstein Journal of Organic Chemistry, 2011
An efficient formal total synthesis of (±)-clavukerin A was accomplished via a gold-catalyzed cycloisomerization of a 3-methoxy-1,6-enyne 5 as the key strategy followed by Rh-catalyzed stereoselective hydrogenation of the cycloheptenone 4.
Jae Youp Cheong, Young Ho Rhee
doaj   +1 more source

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