[EN] RENEWABLE FURAN BASED AMINE CURING AGENTS FOR EPOXY THERMOSET<br/>[FR] AGENTS DE DURCISSEMENT AMINE À BASE DE FURANE RENOUVELABLE POUR PLASTIQUE ÉPOXYDIQUE THERMODURCISSABLE
申请人:PALMESE GIUSEPPE R
公开号:WO2019040389A1
公开(公告)日:2019-02-28
The present invention relates novel furan based amine cross-linkers with improved thermomechanical and water barrier properties. The novelty of this invention is the use of aromatic, and hydrophobic aliphatic aldehydes to bridge two furfuryl amines, which yields a diamine or tetra amines with a significantly enhanced hydrophobic character. These diamine cross-linkers exhibit enhanced water barrier properties and thermomechanical properties when cured with both commercial and synthetic epoxies.
The Direct, Enantioselective, One-Pot, Three-Component, Cross-Mannich Reaction of Aldehydes: The Reason for the Higher Reactivity of Aldimineversus Aldehyde in Proline-Mediated Mannich and Aldol Reactions
In the proline-mediatedMannich and aldolreactions of propanal as a nucleophile, the aldimine prepared from benzaldehyde and p-anisidine is about 7 times more reactive than the corresponding aldehyde, benzaldehyde, as an electrophile. This higherreactivity of aldimine over aldehyde is attributed to the carboxylic acid of proline protonating the basic nitrogen atom of the aldimine more effectively
Asymmetric cross- and self-aldol reactions of aldehydes in water with a polystyrene-supported triazolylproline organocatalyst
作者:Patricia Llanes、Sonia Sayalero、Carles Rodríguez-Escrich、Miquel A. Pericàs
DOI:10.1039/c6gc00792a
日期:——
A polystyrene-immobilized triazolylproline has been prepared by a bottom-up approach involving co-polymerization with full regiocontrol. The resulting PS resin swells in water and has been applied to the enantioselective cross-aldol...
Substrate-Dependent Stereospecificity of Tyl-KR1: An Isolated Polyketide Synthase Ketoreductase Domain from<i>Streptomyces fradiae</i>
作者:Matthias Häckh、Michael Müller、Steffen Lüdeke
DOI:10.1002/chem.201300554
日期:2013.7.1
configuration of the Tyl‐KR1 reduction products was determined by using vibrational circular dichroism (VCD) spectroscopy combined with quantum chemical calculations. The conversion of only one of the tested substrates, 2‐methyl‐3‐oxovaleric acid N‐acetylcysteamine thioester, afforded the expected anti‐(2R,3R) configuration of the α‐methyl‐β‐hydroxyl ester product, representing the stereochemistry observed for