Now showing items 225-244 of 394

    • Observation of nuclear-spin Seebeck effect 

      Kikkawa, Takashi; Reitz, Derek; Ito, H.; Makiuchi, Takahiko; Sugimoto, T.; Tsunekawa, K.; Daimon, Shunsuke; Oyanagi, Koichi; Ramos Amigo, Rafael Enrique; Takahashi, Satoshi; Shiomi, Yuki; Tserkovnyak, Yaroslav; Saitoh, Eiji (Nature Publishing Group, 2021)
      Thermoelectric effects have been applied to power generators and temperature sensors that convert waste heat into electricity. The effects, however, have been limited to electrons to occur, and inevitably disappear at low ...
    • Oligoalanine helical callipers for cell penetration 

      Pazo Pascual, Marta; Juanes Carrasco, Marisa; Lostalé Seijo, Irene; Montenegro García, Javier (Royal Society of Chemistry, 2018-05-23)
      Even for short peptides that are enriched in basic amino acids, the large chemical space that can be spanned by combinations of natural amino acids hinders the rational design of cell penetrating peptides. We here report ...
    • A One-Step, Versatile Synthesis of Dibenzo [n.2.2] Macrobicyclic Compounds via a Conformation-Directed Macrocyclization Reaction 

      Lobato, Rubén; Veiga, Alberte X.; Pérez-Vázquez, Jaime; Fernández-Nieto, Fernando; Paleo, M. Rita; Sardina, F. Javier (American Chemical Society, 2013)
      A series of dibenzo [n.2.2] bicyclic compounds (n = 2–20) were prepared in one step and good yields starting from dimethyl anthracene-9,10-dicarboxylate. Reduction of the aromatic diester using lithium/naphthalene led to ...
    • Orbital, charge, and spin couplings in Ru 25+O9 dimers of Ba3CoRu2O9 

      Zhou, Haidong; Kiswandhi, Andhika; Barlas, Yafis; Brooks, James; Siegrist, Theo Max; Li, G.; Balicas, Luis; Cheng, J. G.; Rivadulla, Francisco (APS Physics, 2012)
      e magnetic, transport, and structural properties of cold-pressed Ba3CoRu2O9 show (i) an antiferromagnetic transition, (ii) a semiconductor-semiconductor electronic transition where the resistivity is dominated by the ...
    • Organometallic catalysis in aqueous and biological environments: harnessing the power of metal carbenes 

      Gutiérrez Hernández, Sara; Tomás Gamasa, María (Royal Society of Chemistry, 2022)
      Translating the power of transition metal catalysis to the native habitats of enzymes can significantly expand the possibilities of interrogating or manipulating natural biological systems, including living cells and ...
    • Organometallic catalysis in biological media and living settings 

      Martínez Calvo, Miguel; Mascareñas Cid, José Luis (Elsevier, 2018-01-29)
      Organometallic catalysis has allowed the development of an impressive number of chemical transformations that could not be achieved using classical methodologies. Most of these reactions have been accomplished in organic ...
    • Oxidation of Alkynes via Catalytic Metal-Vinylidenes 

      Álvarez Pérez, Andrea; Saá Rodríguez, Carlos; Varela Carrete, Jesús Ángel (Thieme, 2020)
      Metal-vinylidenes, generated by treatment of terminal alkynes with transition metals, are very useful intermediates in modern synthetic chemistry as shown by the high number of transformations in which they are involved. ...
    • Oxygen vacancies in strained SrTiO 3 thin films: Formation enthalpy and manipulation 

      Iglesias, L.; Sarantopoulos, Alexandros; Magén, Cesar; Rivadulla, Francisco (APS Physics, 2017)
      We report the enthalpy of oxygen vacancy formation in thin films of electron-doped SrTiO 3 , under different degrees of epitaxial stress. We demonstrate that both compressive and tensile strain decrease this energy at ...
    • Palladium(II)-Catalyzed annulation between ortho-alkenylphenols and allenes. Key role of the metal geometry in determining the reaction outcome 

      Casanova González, Noelia; del Rio, Karina P.; García Fandiño, Rebeca; Mascareñas Cid, José Luis; Gulías Costa, Moisés (American Chemical Society, 2016-04-14)
      2-Alkenylphenols react with allenes, upon treatment with catalytic amounts of Pd(II) and Cu(II), to give benzoxepine products in high yields and with very good regio- and diastereoselectivities. This contrasts with the ...
    • Palladium-Catalyzed [5+2] Heteroannulation of Phenethylamides with 1,3-Dienes to Dopaminergic 3-Benzazepines 

      Velasco Rubio, Álvaro; Varela Carrete, Jesús Ángel; Saá Rodríguez, Carlos (American Chemical Society, 2020)
      Phenethyltriflamides react with 1,3-dienes upon treatment with a catalytic amount of Pd(OAc)2 and Cu(OAc)2/O2 as oxidant to afford chemo-, regio- and diastereoselectively 2,3,4,5-tetrahydro-1H-benzo[d]azepines (3-benzazepine ...
    • Palladium-Catalyzed Conjugate Addition of Terminal Alkynes to Enones 

      Villarino Palmaz, Lara; García Fandiño, Rebeca; López García, Fernando; Mascareñas Cid, José Luis (American Chemical Society, 2012)
      A practical protocol for the hydroalkynylation of enones using Pd catalysis is reported. The reaction proceeds efficiently with a variety of alkynes as well as with several cyclic and acyclic enones, providing synthetically ...
    • Palladium-Catalyzed Formal (4+2) Cycloaddition between Alkyl Amides and Dienes Initiated by the Activation of C(sp3)−H Bonds 

      Cendón Mariño, Borja; Font Molíns, Marc; Mascareñas Cid, José Luis; Gulías Costa, Moisés (American Chemical Society, 2020)
      We report a formal (4+2) cycloaddition between alkyl-nosylamides and dienes enabled by a palladium-catalyzed activation of C(sp3)–H bonds beta to the amide group. This atom economical reaction, which proceeds under ...
    • Palladium-Catalyzed Formal (5 + 2) Annulation between ortho-Alkenylanilides and Allenes 

      Cendón Mariño, Borja; Casanova González, Noelia; Comanescu, Cezar; García Fandiño, Rebeca; Seoane Fernández, Andrés; Gulías Costa, Moisés; Mascareñas Cid, José Luis (American Chemical Society, 2017-03-27)
      2-Alkenyltriflylanilides react with allenes upon treatment with catalytic amounts of Pd(OAc)2 and Cu(II) to give highly valuable 2,3-dihydro-1H-benzo[b]azepines, in good yields, and with very high regio- and diastereosel ...
    • Palladium-Catalyzed Tandem Cycloisomerization/Cross-Coupling of Carbonyl- and Imine-Tethered Alkylidenecyclopropanes 

      Verdugo Leal, Felipe Ignacio; Rodiño Balboa, Ricardo; Calvelo Souto, Martín; Mascareñas Cid, José Luis; López García, Fernando José (Wiley, 2022)
      A palladium catalytic system is reported for the divergent tandem cycloisomerization and cross-coupling of carbonyl- and imine-tethered alkylidenecyclopropanes (ACPs). The selection of ancillary ligands is pivotal for the ...
    • Palladium-Catalyzed, Enantioselective Formal Cycloaddition between Benzyltriflamides and Allenes: Straightforward Access to Enantioenriched Isoquinolines 

      Vidal Pereira, Xandro; Mascareñas Cid, José Luis; Gulías Costa, Moisés (American Chemical Society, 2019)
      Benzyl and allyltriflamides can engage in Pd-catalyzed oxidative (4+2) annulations with allenes, to produce highly valuable tetrahydroisoquinoline or dihydropyridine skeletons. The reaction is especially efficient when ...
    • Pd-Catalyzed (3 + 2) Heterocycloadditions between Alkylidenecyclopropanes and Carbonyls: Straightforward Assembly of Highly Substituted Tetrahydrofurans 

      Verdugo Leal, Felipe Ignacio; Concepción Vicente, Eduardo da; Rodiño Balboa, Ricardo; Calvelo Souto, Martín; Mascareñas Cid, José Luis; López García, Fernando (American Chemical Society, 2020)
      A Pd catalyst made from a Pd(0) source and a bulky biaryl phosphine ligand promotes highly efficient intramolecular (3 + 2) heterocycloadditions between alkylidenecyclopropanes (ACPs) and carbonyls. The annulations provide ...
    • Pd-Catalyzed Allylic C-H Activation to Seven-Membered N,O-Heterocycles 

      Velasco Rubio, Álvaro; Varela Carrete, Jesús Ángel; Saá Rodríguez, Carlos (Royal Society of Chemistry, 2021)
      Pd-catalyzed allylic C-H activation of simple olefins allows an easy entry to seven-membered N,O-heterocycles such as 1,4-benzoxazepines (1,4-BZOs), 1,4-benzodiazepinones (1,4-BZDs) and 1,4-oxazepanes in good to excellent ...
    • PEG-dendritic block copolymers for biomedical applications 

      Sousa Hervés, Ana; Riguera Vega, Ricardo; Fernández Megía, Eduardo (Royal Society of Chemistry, 2012)
      The incorporation of poly(ethylene glycol) (PEG) chains at the focal point of dendrimers results in customizable platforms where the careful selection of the PEG length, the nature of the peripheral groups, and the structure ...
    • Peptide/Cas9 nanostructures for ribonucleoprotein cell membrane transport and gene edition 

      Lostalé Seijo, Irene; Louzao Pernas, Iria; Juanes Carrasco, María Luisa; Montenegro García, Javier (Royal Society of Chemistry, 2017)
      The discovery of RNA guided endonucleases has emerged as one of the most important tools for gene edition and biotechnology. The selectivity and simplicity of the CRISPR/Cas9 strategy allows the straightforward targeting ...
    • Peptide–DNA conjugates as tailored bivalent binders of the oncoprotein c-Jun 

      Pazos Chantrero, Elena; Portela Pallares, Cecilia; Penas Tallón, Cristina; Vázquez Sentís, Marco Eugenio; Mascareñas Cid, José Luis (Royal Society of Chemistry, 2015)
      We describe a ds-oligonucleotide–peptide conjugate that is able to efficiently dismount preformed DNA complexes of the bZIP regions of oncoproteins c-Fos and c-Jun (AP-1), and therefore might be useful as disrupters of ...





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