SEMINARIOS AREA QUÍMICA ORGÁNICA FBIOYF/IQUIR

  SEMINARIO QUÍMICA ORGÁNICA 02-05-22 EXPOSITOR : Lic. Maribel O. Marcarino TÍTULO :  " Real-time prediction of 1H and 13C chemical shifts with DFT accuracy using a 3D graph neural network " . FUENTE :  Yanfei Guan, S. V. Shree Sowndarya*, Liliana C. Gallegos, Peter C. St. John and Robert S. Paton. Chem. Sci. , 2021 , 12 , 12012-12026 DOI: 10.1039/d1sc03343c . DÍA, HORA y LUGAR : Lunes 2 de mayo de 2022, 18:00 h, Plataforma MEET GOOGLE. Link :  meet.google.com/bfh-poxv-bso RESUMEN :  Nuclear magnetic resonance (NMR) is one of the primary techniques used to elucidate the chemical structure, bonding, stereochemistry, and conformation of organic compounds. The distinct chemical shifts in an NMR spectrum depend upon each atom's local chemical environment and are influenced by both through-bond and through-space interactions with other atoms and functional groups. The in silico prediction of NMR chemical shifts using quantum mechanical (QM) calculations is now commo...

SEMINARIO QUÍMICA ORGÁNICA 25-04-22 EXPOSITOR : Dr. Ernesto G. Mata TÍTULO :  " An Alkyne-Metathesis-Based Approach to the Synthesis of the AntiMalarial Macrodiolide Samroiyotmycin A " . FUENTE : Ektoras Yiannakas,Mark I. Grimes,James T. Whitelegge,Prof. Alois Fürstner,Prof. Alison N. Hulme;  Angew Chem, Int Ed., 2021 60(34):18504-18508. doi: 10.1002/anie.202105732. DÍA, HORA y LUGAR : Lunes 25 de abril de 2022, 18:00 h, Plataforma MEET GOOGLE. Link :  meet.google.com/bfh-poxv-bso RESUMEN :  This is the first total synthesis of samroiyotmycin A (1), a C2-symmetric 20-membered anti-malarial macrodiolide. The convergent synthetic strategy orchestrates bisalkyne fragment-assembly using an unprecedented Schçllkopf-type condensation on a substituted β-lactone and an ambitious late-stage one-pot alkyne cross metathesis–ring-closing alkyne metathesis (ACM–RCAM) reaction. The demanding alkyne metathesis sequence is achieved using the latest generation of molybdenum alkylidy...

SEMINARIO QUÍMICA ORGÁNICA 18-04-22 EXPOSITOR : Lic. Florencia Cámpora TÍTULO :  " Enantioselective Total Synthesis of [3]-Ladderanol through Late-Stage Organocatalytic Desymmetrization " . FUENTE :   Sayan Ray , Subhajit Mondal , Prof. Dr. Santanu Mukherjee ;  Angew. Chem. Int. Ed.  2022 . https://doi.org/10.1002/anie.202201584 DÍA, HORA y LUGAR : Lunes 18 de abril de 2022, 18:00 h, Plataforma MEET GOOGLE. Link :  meet.google.com/bfh-poxv-bso RESUMEN :  An enantioselective desymmetrization route to [3]-ladderanol has been devised that is centered around an organocatalytic enantioselective formal C(sp2)−H alkylation of tetracyclic meso-cyclohexenedione. This strategy involving the late-stage introduction of chirality offers flexibility and enabled the facile synthesis of both enantiomers of [3]-ladderanol as well as an analogue.  

  SEMINARIO QUÍMICA ORGÁNICA 11-04-22 EXPOSITOR : Lic. Renzo Carlucci TÍTULO :  " Mechanochemical Synthesis of Organic Dyes and Fluorophores " . FUENTE :     Banerjee, M., Bhosle, A., Chatterjee, A. and Saha, S.; J. Org. Chem. 2021 , 86 , 13911–13923 . DÍA, HORA y LUGAR : Lunes 11 de abril de 2022, 18:00 h, Plataforma MEET GOOGLE. Link :  meet.google.com/bfh-poxv-bso RESUMEN :  The syntheses of dyes and fluorophores have significant commercial importance. In recent years, mechanochemistry has emerged as a green and sustainable alternative for the synthesis of conventional dyes, new fluorophores, and also synthetic modification of known dyes for their use as chemosensors. The dyestuffs based on BODIPYs, rhodamine, fluorescein, perylenedimides, coumarins, benzothiazoles, etc. were synthesized or derivatized by grinding or milling. The synopsis aims to pay key attention to their synthesis and the applications as chemosensors will be briefly covered.