Results 1 to 10 of about 672 (55)
Advanced Synthesis &Catalysis, Volume 365, Issue 19, Page 3234-3240, October 13, 2023., 2023 Abstract The potential of phosphites as nucleophiles for the asymmetric synthesis of chiral chromene derivatives has been overlooked in the literature. Herein, we report a promising approach via asymmetric organocatalyzed phospha‐Michael addition to iminochromenes, using a bifunctional squaramide, which gives access to chromenylphosphonates, an ...
Eugenia Marqués‐López +4 more
wiley +1 more source
Enantioselective C−P Bond Formation through C(sp3)−H Functionalization
Advanced Synthesis &Catalysis, Volume 365, Issue 13, Page 2152-2158, July 4, 2023., 2023 Abstract An enantioselective C−P bond formation has been developed through a C(sp3)−H activation in an oxidation step followed by an organocatalyzed hydrophosphonylation protocol. The asymmetric organocatalytic Pudovik reaction has been achieved following a one‐pot strategy, starting from different benzylic and allylic alcohols and dibenzyl phosphite ...
Sandra Ardevines +6 more
wiley +1 more source
Investigation of Squaramide Catalysts in the Aldol Reaction En Route to Funapide
European Journal of Organic Chemistry, Volume 2022, Issue 1, January 11, 2022., 2022 The asymmetric aldol reaction of an industrially viable synthesis of funapide, a promising analgesic agent, was studied with a range of squaramide catalysts. Compared to previously employed thiourea structures, these catalysts provided a non‐negligible improvement in the enantioselectivity of the reaction, while keeping similar activity.
Isaac G. Sonsona +6 more
wiley +1 more source
Colorants fluorats hidrofòbics i el seu ancoratge sobre materials [PDF]
, 2014 Les superfícies hidrofòbiques artificials són de gran interès en una àmplia gamma d'aplicacions industrials gràcies a les seves propietats d'autoneteja, anticontaminació biològica, antifongs, antiadherència i anticorrosió, entre d'altres. En la indústria
Montagut Pérez, Ana Maria +3 more
core +1 more source
Understanding Chiral Proton Catalysis Using Cinchonium Derivatives in aza‐Michael Additions
Advanced Synthesis &Catalysis, Volume 367, Issue 11, June 3, 2025.Abstract This work presents a detailed mechanistic study of a quininium‐catalyzed aza‐Michael reaction, providing essential information for advancing chiral proton catalysis (CPC). The use of cinchona derivatives as chiral proton catalysts demonstrates their potential beyond their conventional roles as base‐promoted and phase‐transfer catalysts ...
Fernando Auria‐Luna +4 more
wiley +1 more source
Síntesi i aplicacions en catàlisi de lligands P-estereogènics: SIP, MaxPHOS, MaxPHOX [PDF]
, 2016 La catàlisi és una eina clau per a la síntesi orgànica. Malgrat els avenços freqüents, existeix encara una demanda de nous lligands i catalitzadors. Dins dels molts lligands existents, destaquen els de tipus fosfina.
Riera i Escalé, Antoni +2 more
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Multicomponent Cyanation of 2‐Amino‐3‐cyano‐4H‐chromenes in Aqueous Media
Asian Journal of Organic Chemistry, Volume 13, Issue 12, December 2024.Chromenes, especially 2‐amino‐3‐cyano‐4H‐chromene derivatives, are present in biologically active compounds with potential properties, although the number of synthetic methods to date is limited. Here, we report a new protocol using a mild source of cyanide (acetone cyanohydrin), green solvents, and catalytic conditions via a multicomponent approach ...
Sandra Ardevines +5 more
wiley +1 more source
Síntesi de tiourees quirals i el seu ús com a organocatalitzadors [PDF]
, 2010 En el present treball de recerca s'ha posat a punt la síntesi d'organocatalitzadors bifuncionals ciclobutànics de tipus tiourea. Amb aquests catalitzadors s'han realitzat proves en reaccions d'addició de malonats a nitroalquens.
Gargallo-Garriga, Albert +3 more
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New Twists in the Chemistry of Thioureas: 1,3‐Thiazolidines as a Vector of Sustainability
Chemistry – A European Journal, Volume 30, Issue 57, October 11, 2024.A new sustainable method for synthesizing 1,3‐N,S‐heterocycles, including 1,3‐thiazolidine‐2‐imines and 4,5‐dihydrothiazol‐2‐amines is reported. This innovative approach offers considerable shorter reaction times with higher yields, reduced energy consumption, and the elimination of hazardous chemicals.
Guillermo Canudo‐Barreras +2 more
wiley +1 more source
Nous substrats per a la reacció de Pauson-Khand. Aplicació a la síntesi de productes biològicament actius [PDF]
, 2012 Els compostos ciclopentànics són elements estructurals importants en diferents productes naturals, farmacèutics i de química fina. La reacció de Pauson-Khand (PKR) ha demostrat que és un mètode molt eficaç per sintetitzar aquests tipus de compostos.
Aiguabella Font, Núria +1 more
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