<i>N</i>
,
<i>N</i>
‐Dialkylhydrazones as Versatile Umpolung Reagents in Enantioselective Anion‐Binding Catalysis
作者:Melania Gómez‐Martínez、María Carmen Pérez‐Aguilar、Dariusz G. Piekarski、Constantin G. Daniliuc、Olga García Mancheño
DOI:10.1002/anie.202013380
日期:2021.3
ion‐pair complex was envisioned. The formation of such a network was further supported by both experimental and computationalstudies, which showed the crucial role of the anion as a template unit. The asymmetric Reissert‐type reaction of quinolines as a model test reaction chemoselectively delivered highly enantiomerically enriched hydrazones (up 95:5 e.r.) that could be further derivatized to value‐added
A number of nitrile-containing chiral molecules were synthesized via asymmetric nucleophilic addition of formaldehyde N,N-dialkylhydrazone as the nitrile equivalent. Chiral N,N′-dioxide/metal salt complexes enabled the asymmetric addition reactions to both isatin-derived imines and α,β-unsaturated ketones, generating amino nitriles and 4-oxobutanenitrile derivatives in good yields with high enantioselectivities
Enantioselective Conjugate Addition of <i>N</i>,<i>N</i>-Dialkylhydrazones to α-Hydroxy Enones
作者:David Monge、Eloísa Martín-Zamora、Juan Vázquez、Manuel Alcarazo、Eleuterio Álvarez、Rosario Fernández、José M. Lassaletta
DOI:10.1021/ol071055+
日期:2007.7.1
The activation of alpha-hydroxy enones by the Zn(OTf)2/tBuBOX catalyst enables the enantioselectiveconjugateaddition of 1-methyleneaminopyrrolidine as a neutral d1 synthon. Experimental evidence supports a stereochemical model where a triflate ligand controls the geometry of the catalyst-substrate complex by means of a OH-OTf hydrogen bond. The synthesis of beta-cyano acids illustrates the potential
[EN] SYNTHESIS AND CHARACTERIZATION OF RU ALKYLIDENE COMPLEXES<br/>[FR] SYNTHÈSE ET CARACTÉRISATION DE COMPLEXES D'ALKYLIDÈNE RU
申请人:MATERIA INC
公开号:WO2018075479A1
公开(公告)日:2018-04-26
This invention relates generally to olefin metathesis catalyst compounds, to the preparation of such compounds, compositions comprising such compounds, methods of using such compounds, articles of manufacture comprising such compounds, and the use of such compounds in the metathesis of olefins and olefin compounds. The invention has utility in the fields of catalysts, organic synthesis, polymer chemistry, and industrial and fine chemicals industry.
Über die Hydrazinomethylierung CH- und NH-acider Verbindungen
作者:G. Zinner、H. Böhlke、W. Kliegel
DOI:10.1002/ardp.19662990310
日期:——
wird die Herstellung und Charakterisierung einiger trisubstituierter Hydrazine sowie ihre Verwendung zur Hydrazinomethylierung CH‐acider (Antipyrin und Indol) und NH‐acider Verbindungen (Phthalimid, Succinimid und Benzolsulfhydroxamsäure) beschrieben.