Organizaciones supramoleculares de moléculas dendríticas con estructuras tipo "Bent-Core"

Resumen del póster presentado a la 6ª Jornada de Jóvenes Investigadores en Física y Química de Aragón celebrada en Zaragoza el 20 de noviembre de 2014.Beca de Colaboración del MEC y Beca de Iniciación a la Investigación del INA (A. M. B-S), Beca JAE-Predoc (M. M-A), Beca FPI (A. C.). Grupo de Cristales Líquidos y Polímeros: proyectos MAT2012-38538-CO3-01 y CTQ2012-35692 (MINECO-FEDER) y E04 (Gobierno de Aragón).Peer reviewe

Diversity in composition of scarlet (S. aethiopicum) and gboma (S. macrocarpon) eggplants and of interspecific hybrids between S. aethiopicum and common eggplant (S. melongena)

[EN] Scarlet (Solanum aethiopicum) and gboma (S. macrocarpon) eggplants are cultivated vegetable crops native to Africa, for which no comprehensive reports exist on composition and diversity. We have evaluated diversity in composition of three varieties of scarlet eggplant and four varieties of gboma eggplant, as well as of four interspecific hybrids between scarlet and common eggplant (S. melongena) and their respective parents. With the exception of moisture (between 85.8 and 88.3 g/100 g) and pH (between 5.32 and 5.89), there was a wide diversity among varieties within each of the species for the composition traits evaluated, revealing ample possibilities for selection of varieties with improved fruit composition. Scarlet eggplant varieties evaluated presented, on average, lower content than gboma eggplant varieties for carbohydrates (3.60 vs 6.48 g/100 g), starch (3.18 vs 6.15 g/100 g), vitamin C (11.6 vs 18.9 mg/100 g), and total phenolics (24.4 vs 144 mg/100 g) and higher values for soluble sugars content and for the ascorbic/dehydroascorbic acid ratio. Interspecific hybrids between scarlet and gboma eggplants presented moisture content (79.0 g/100 g) and pH (5.15) values below those of any of the parents. For the rest of traits, values were intermediate between both parents, although much more similar to the scarlet eggplant parent. (C) 2015 Elsevier Inc. All rights reserved.This work was partially financed by the Ministerio de Ciencia y Tecnologı´a and FEDER (AGL2012-34213) and project OTRI-UCMFundacio´n Sabor y Salud (323-2012).San José, R.; Plazas Ávila, MDLO.; Sánchez-Mata, MC.; Cámara Hurtado, MM.; Prohens Tomás, J. (2016). Diversity in composition of scarlet (S. aethiopicum) and gboma (S. macrocarpon) eggplants and of interspecific hybrids between S. aethiopicum and common eggplant (S. melongena). Journal of Food Composition and Analysis. 45:130-140. https://doi.org/10.1016/j.jfca.2015.10.009S1301404

Diversity and relationships in key traits for functional and apparent quality in a collection of eggplant: fruit phenolics content, antioxidant activity, polyphenol oxidase activity, and browning

This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Agricultural and Food Chemistry, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work seehttp://dx.doi.org/10.1021/jf402429kEggplant (Solanum melongena) varieties with increased levels of phenolics in the fruit present enhanced functional quality, but may display greater fruit flesh browning. We evaluated 18 eggplant accessions for fruit total phenolics content, chlorogenic acid content, DPPH scavenging activity, polyphenol oxidase (PPO) activity, liquid extract browning, and fruit flesh browning. For all the traits we found a high diversity, with differences among accessions of up to 3.36-fold for fruit flesh browning. Variation in total content in phenolics and in chlorogenic acid content accounted only for 18.9% and 6.0% in the variation in fruit flesh browning, and PPO activity was not significantly correlated with fruit flesh browning. Liquid extract browning was highly correlated with chlorogenic acid content (r = 0.852). Principal components analysis (PCA) identified four groups of accessions with different profiles for the traits studied. Results suggest that it is possible to develop new eggplant varieties with improved functional and apparent quality.This project has been funded by Universitat Politecnica de Valencia through the grants SP20120681 and PAID-06-11 Nr. 2082, and by Ministerio de Economia y Competitividad Grant AGL2012-34213 (jointly funded by FEDER).Plazas Ávila, MDLO.; López Gresa, MP.; Vilanova Navarro, S.; Torres Vidal, C.; Hurtado Ricart, M.; Gramazio, P.; Andújar Pérez, I.... (2013). Diversity and relationships in key traits for functional and apparent quality in a collection of eggplant: fruit phenolics content, antioxidant activity, polyphenol oxidase activity, and browning. Journal of Agricultural and Food Chemistry. 61(37):8871-8879. https://doi.org/10.1021/jf402429kS88718879613

Synthesis and stereoselective lithiation of enantiopure 2‐(1‐aminoalkyl)aziridine–borane complexes

This work shows that the enantiopure 2-(1-aminoalkyl)aziridine–borane complexes can easily be obtained by two alternative methodologies: either reaction with BF3·Et2O followed by reduction with LiAlH4 or by direct reaction with a solution of BH3 in THF. In addition, regio- and stereoselective C3 deuteration or silylation of 2-(1- aminoalkyl)aziridine 1 can be effected by eprotonation/ deuteration or silylation/decomplexation of the corresponding borane complex 2. Application of this methodology to functionalize 2-(1-aminoalkyl)aziridines with other different electrophiles is currently under investigation.Ministerio de Ciencia y Tecnología (España)Depto. de Química en Ciencias FarmacéuticasFac. de FarmaciaTRUEpu

Totally Selective Ring-Opening of Amino Epoxides with Ketones: A General Entry to Enantiopure (2R,3S)- and (2S,3S)-3-Aminoalkano-1,2-diols.

Transformation of enantiopure diastereoisomers (2R,1′S)- and (2S,1′S)-2-(1-aminoalkyl) epoxides into the corresponding 4-(1-aminoalkyl)-1,3-dioxolanes is achieved by reaction with different ketones in the presence of BF3‚Et2O. The conversion takes place in very high yields, totalselectivity, and without epimerization. A mechanism to explain this transformation is proposed. The obtained 1,3-dioxolanes can be deprotected,and (2R,3S)- and (2S,3S)-3-aminoalkano-1,2-diols were isolated.Ministerio de Ciencia y Tecnología (España)Depto. de Química en Ciencias FarmacéuticasFac. de FarmaciaTRUEpu