Výsledky vyhledávání - "Armando Navarro-Vázquez"

Akademický článek

Relative configuration of micrograms of natural compounds using proton residual chemical shift anisotropy

Autor: Nilamoni Nath, Juan Carlos Fuentes-Monteverde, Dawrin Pech-Puch, Jaime Rodríguez, Carlos Jiménez, Markus Noll, Alexander Kreiter, Michael Reggelin, Armando Navarro-Vázquez, Christian Griesinger

Publikováno v: Nature Communications, Vol 11, Iss 1, Pp 1-9 (2020)

Determination of 3D molecular structures remains challenging for natural products or organic compounds available in minute amounts. Here, the authors determine the structure of complex molecules, including few micrograms of briarane B-3 isolated from

Externí odkaz: https://doaj.org/article/91706d2613c64c70a003dfbe1d68564b

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Akademický článek

Connection of Isolated Stereoclusters by Combining 13C-RCSA, RDC, and J-Based Configurational Analyses and Structural Revision of a Tetraprenyltoluquinol Chromane Meroterpenoid from Sargassum muticum

Autor: Juan Carlos C. Fuentes-Monteverde, Nilamoni Nath, Abel M. Forero, Elena M. Balboa, Armando Navarro-Vázquez, Christian Griesinger, Carlos Jiménez, Jaime Rodríguez

Publikováno v: Marine Drugs, Vol 20, Iss 7, p 462 (2022)

The seaweed Sargassum muticum, collected on the southern coast of Galicia, yielded a tetraprenyltoluquinol chromane meroditerpene compound known as 1b, whose structure is revised. The relative configuration of 1b was determined by J-based configurati

Externí odkaz: https://doaj.org/article/318f8ec2581e420d8775f2dd3f6625a6

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Akademický článek

ATRIBUIÇÃO DA ESTEREOQUÍMICA DA α-SANTONINA ATRAVÉS DAS MEDIDAS DO ACOPLAMENTO DIPOLAR RESIDUAL

Autor: Rubens R. Teles, José A. A. França, Armando Navarro-Vázquez, Fernando Hallwass

Publikováno v: Química Nova, Vol 38, Iss 10, Pp 1345-1350 (2015)

The measurement of nuclear magnetic resonance parameters in an anisotropic media, such as residual dipolar coupling (RDC), has proven to be an excellent methodology for the refinement of chemical structures, being used as a complementary tool in the

Externí odkaz: https://doaj.org/article/307493b8b9b644f3979090f454fdd74f

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Akademický článek

Author Correction: Relative configuration of micrograms of natural compounds using proton residual chemical shift anisotropy

Publikováno v: Nature Communications, Vol 11, Iss 1, Pp 1-1 (2020)

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

Externí odkaz: https://doaj.org/article/30211ca3c6df4ed7a0a0900fc4e294db

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Akademický článek

Why base-catalyzed isomerization of N-propargyl amides yields mostly allenamides rather than ynamides

Autor: Armando Navarro-Vázquez

Publikováno v: Beilstein Journal of Organic Chemistry, Vol 11, Iss 1, Pp 1441-1446 (2015)

The base-catalyzed isomerization of N-propargylamides or carbamates may furnish N-allenyl compounds (allenamides/allencarbamates) or further evolve to N-alkynyl compounds (ynamides or yncarbamates). The particular fate of this reaction varies from ex

Externí odkaz: https://doaj.org/article/49a490540141403fbc2217d8341eaae5

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Residual dipolar couplings as a tool for structural analysis of ionic liquids

Autor: Higor D. F. de Melo, Daiane S. Carvalho, Fernando Hallwass, Ulrich Sternberg, Armando Navarro-Vázquez

Publikováno v: Chemical Communications. 59:4806-4809

Swelling of an acrylonitrile/N-N-dimethylacrylamide copolymer in ionic liquids provides residual dipolar couplings which are applied to conformational analysis of the bulk ionic liquid.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::04851cd1d513e537ef4342bdb8752bd3
https://doi.org/10.1039/d3cc00929g

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Weizhouochrones: Gorgonian-Derived Symmetric Dimers and Their Structure Elucidation Using Anisotropic NMR Combined with DP4+ Probability and CASE-3D

Autor: Xiao-Lu Li, Tong Ru, Armando Navarro-Vázquez, Peter Lindemann, Marc Nazaré, Xu-Wen Li, Yue-Wei Guo, Han Sun

Publikováno v: Journal of Natural Products. 85:1730-1737

Natural product dimers have intriguing structural features and often have remarkable pharmacological activities. We report here two uncommon marine gorgonian-derived symmetric dimers, weizhouochrones A (

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0003af37082d3ad26f1af9506a9b36fb
https://doi.org/10.1021/acs.jnatprod.2c00257

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Programmable alignment media from self-assembled oligopeptide amphiphiles for the measurement of independent sets of residual dipolar couplings in organic solvents

Autor: Yuexiao Lin, Jiaqian Li, Si-Yong Qin, Han Sun, Yan-Ling Yang, Armando Navarro-Vázquez, Xinxiang Lei

Publikováno v: Chemical Science. 13:5838-5845

NMR spectroscopy in anisotropic media has emerged as a powerful technique for the structural elucidation of organic molecules. Its application requires weak alignment of analytes by means of suitable alignment media. Although a number of alignment me

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c6eaafeb54f3523d9a0622f1b175638b
https://doi.org/10.1039/d2sc01057g

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