Structural optimization of thiourea-based bifunctional organocatalysts for the highly enantioselective dynamic kinetic resolution of azlactones
作者:Albrecht Berkessel、Santanu Mukherjee、Thomas N. Müller、Felix Cleemann、Katrin Roland、Marc Brandenburg、Jörg-M. Neudörfl、Johann Lex
DOI:10.1039/b607574f
日期:——
describes the synthesis of a library of structurally diverse bifunctionalorganocatalysts bearing both a quasi-Lewis acidic (thio)urea moiety and a Bronsted basic tertiary amine group. Sequential modification of the modular catalyst structure and subsequent screening of the compounds in the alcoholytic dynamickineticresolution (DKR) of azlactones revealed valuable structure-activity relationships. In particular
cis-IPDTA: An original polyaminopolycarboxylic chelating agent from isophoronediamine. Synthesis and thermodynamic characterization of metal complexes
作者:Arianna Maria Giani、Adrienn Vágner、Roberto Negri、Zsolt Baranyai、Giovanni Battista Giovenzana
DOI:10.1016/j.poly.2016.02.010
日期:2016.4
An original diaminotetracarboxylic acid chelatingagent (cis-IPDTA, cis-isophoronediamine-N,N,N′,N′-tetraacetic acid) was prepared starting from commercially available isophoronediamine. Its protonation constants and the stability of selected metalcomplexes were determined by potentiometric titrations. The coordination behavior of cis-IPDTA was compared with that of the linear congener BDTA and iminodiacetic
Asymmetric Morita−Baylis−Hillman Reaction Catalyzed by Isophoronediamine-Derived Bis(thio)urea Organocatalysts
作者:Albrecht Berkessel、Katrin Roland、Jörg M. Neudörfl
DOI:10.1021/ol061298m
日期:2006.9
New and improved bis(thio) urea catalysts were synthesized from isophoronediamine (IPDA) and tested in the Morita-Baylis-Hillman reaction. The best results were achieved in the reaction of 2-cyclohexen-1-one with cyclohexanecarbaldehyde, using the catalyst depicted above, in combination with a novel base (N,N,N',N'-tetramethylisophoronediamine, TMIPDA) in toluene. The desired Morita-Baylis-Hillman product was obtained in 75% yield and 96% ee.
[DE] DESTILLATIVE VERFAHREN ZUR HERSTELLUNG VON IPDA MIT EINEM HOHEN CIS/TRANS-ISOMERENVERHÄLTNIS<br/>[EN] METHOD FOR PRODUCING IPDA WITH A HIGH CIS/TRANS ISOMER RATIO BY DISTILLATION<br/>[FR] PROCEDE DE PRODUCTION PAR DISTILLATION D'IPDA AYANT UN RAPPORT CIS/TRANS-ISOMERE ELEVE
申请人:BASF AG
公开号:WO2004024668A3
公开(公告)日:2004-10-14
[EN] PROCESS FOR SYNTHESIZING AMINE FROM NITRILE<br/>[FR] PROCEDE DE SYNTHETISATION D'AMINES A PARTIR DE NITRILES