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Andreu Tortajada Navarro

@antorna.bsky.social

Ambizione Fellow/Junior Group Leader (University of Fribourg 🇨🇭) Organometallic chemistry and catalysis, playing with organosodium compounds and more 😁 He/him 🏳️‍🌈 www.andreutortajada.com

22 Posts332 Follower321 Folgt
Andreu Tortajada Navarro@antorna.bsky.social · 5mo ago

We have our first publication from Fribourg! So happy that is also in Organometallics, one of my favourite journals 😊 pubs.acs.org/doi/full/10.... Congrats to @mikaelleroch.bsky.social and thanks to @unifr.bsky.social chemistry department and everyone made it possible!

Isomerization and Dimerization of 1-Phenylpropyne upon Metalation with Alkyl Lithium Bases and Lewis Basic Polyamine Donors

Since the isomerization of C–C multiple bonds is a powerful strategy in organic synthesis, in this study we have investigated the isomerization upon metalation of 1-phenylpropyne with alkyllithium bas...

pubs.acs.org

Clarence Tan@clarencetankl.bsky.social · 9mo ago

Glad to see that my first paper in the Hevia group is out! This work would not be possible without the support from @antorna.bsky.social and @evaheviagroup.bsky.social as well as the DFT calculations from Ana and Manting!

Eva Hevia@evaheviagroup.bsky.social · 9mo ago

Thrilled to share the work of @clarencetankl.bsky.social and @antorna.bsky.social on elevating #sodium mediated deprotonative #borylation to #catalytic regimes with an insightful #mechanistic study in collaboration with Max Garcia Melchor @pubs.acs.org @unibe.ch pubs.acs.org/doi/10.1021/...

Andreu Tortajada Navarro@antorna.bsky.social · 9mo ago

Excited to see this work published!! Awesome work from Clarence @clarencetankl.bsky.social making catakytic borylation with sodium bases possible!!

Eva Hevia@evaheviagroup.bsky.social · 9mo ago

Thrilled to share the work of @clarencetankl.bsky.social and @antorna.bsky.social on elevating #sodium mediated deprotonative #borylation to #catalytic regimes with an insightful #mechanistic study in collaboration with Max Garcia Melchor @pubs.acs.org @unibe.ch pubs.acs.org/doi/10.1021/...

John Trant@trantteam.bsky.social · 10mo ago

As someone who studies autoimmunity "boosting your immune system" is how you get multiple sclerosis, diabetes or die as your immune cells slowly kill every other part of you in an orgy of violence. However, this list is a way to boost your immune system in a targeted way without incurring ANY risks!

Dr. Jonathan N. Stea@jonathanstea.bsky.social · last yr.

Doctors are AMAZED at these 10 ways to BOOST your immune system: The Tetanus vaccine The Measles vaccine The Polio vaccine The Mumps vaccine The HPV vaccine The Pneumonia vaccine The Hepatitis B vaccine The Rubella vaccine The Diphtheria vaccine The Covid-19 vaccine - @hislopmd.bsky.social

Mikaël LE ROCH@mikaelleroch.bsky.social · 11mo ago

Bonsoir ! Dans le cadre de mon projet postdoc à l’Université de Fribourg, je cherche un groupe disposant d’une GC préparative (ou semi-préparative) pour isoler et caractériser des monoterpènes (collaboration). Si vous avez une piste ou un contact, je suis preneur ! Merci !

Nando López 🏳️‍🌈@nandolopez.es · last yr.

Tienes 12, 13, 14 años. Tu familia buscó un lugar que creían seguro y del que, hayas nacido en él o no -¿eso qué importa?-, tú eres parte. Pero te cuesta sentirlo cuando ves cómo las bestias, cegadas de odio e ignorancia, atacan a quienes lo único que han hecho es tener tus rasgos y tus orígenes.

Andryj Borys@andryjborys.bsky.social · last yr.

Very proud of this work led by Luca Vedani in Inorganic Chemistry @pubs.acs.org unveiling the role of low-valent magnesium nickelates in challenging "ligand-free" cross-coupling reactions! @evaheviagroup.bsky.social pubs.acs.org/doi/10.1021/...

Magnesium Nickelate Complexes and Their Implications in Ni-Catalyzed Cross-Couplings of Aryl Fluorides and Aryl Ethers with Grignard Reagents

The nickel-catalyzed Kumada–Tamao–Corriu cross-coupling reaction is widely used to form C–C bonds and receives continued interest due to the unique ability of nickel to activate challenging organic electrophiles containing C–F and C–O bonds. Recent studies on the nickel-catalyzed cross-coupling of Ar–F and Ar–OMe electrophiles with organolithium nucleophiles have unveiled the key involvement of highly reactive anionic nickelates, in which Li and Ni cooperatively promote the activation of these substrates. However, the possible formation of related heterobimetallic intermediates when employing organomagnesium nucleophiles as cross-coupling partners still remains widely underexplored. Filling this gap in the knowledge, we use air-stable Ni-tris(olefin), Ni(4-Me-stb)3 (where stb = stilbene), as a Ni(0) precursor to systematically investigate its reactivity toward several organomagnesium and organolithium reagents, which has allowed for the structural and spectroscopic characterization of a new family of nickelate complexes. Their possible implications and the influence of their constitution and speciation on the outcome of Kumada–Tamao–Corriu cross-couplings are also investigated through a series of stoichiometric and catalytic reactions, which have uncovered a dramatic solvent effect, hinting at the formation of contacted ion pair species as key to maximizing Mg (or Li)/Ni(0) cooperativity.

pubs.acs.org