Per-Ola Norrby @peonor.bsky.social · 07/10/2026I’ll go with the same prediction as last year, Paul Anastas and John Warner for green chemistry. 220
Per-Ola Norrby @peonor.bsky.social · 01/08/2026I started chemistry information gathering in libraries in 1980. I first used a machine for it in 1985, it really improved the coverage. The machines have gotten incrementally better, and I’ve developed my skill sorting it in parallel. Sure, I’m using AI now, following through to original sources. 040
Reposted by Per-Ola NorrbyRocío Mercado Oropeza @rociomer.bsky.social · 29/07/2026Don't miss your chance to register for the Structured Learning Workshop, to be held October 27-28 in Gothenburg, Sweden. 🇸🇪 Amazing line-up of speakers, super excited to be hosting this event now for the 4th year here at Chalmers! Registration link and more info: chalmers.ungapped.io/Events/5f087...chalmers.ungapped.io2026 CHAIR Structured Learning WorkshopWelcome to the 2026 Chalmers AI Research Center Workshop for Structured Learning. In this workshop we broadly cover topics related to Structured Learning targeting specifically the following questions... 194
Per-Ola Norrby @peonor.bsky.social · 25/07/2026Is that even a word in English? I thought it was Hawaiian. Those who know know. 210
Per-Ola Norrby @peonor.bsky.social · 15/07/2026Looks like an Anglo-Saxon bubble to me. How about if you look at posts in other languages? I would guess quite a few around the world like a non-European team in there. But I don’t have data. 000
Per-Ola Norrby @peonor.bsky.social · 18/05/2026I don’t adhere to a strict ratio, but roughly the same, and much less while on sick leave. 100
Per-Ola Norrby @peonor.bsky.social · 14/05/2026The first GroMoChem in Groningen was a fantastic conference, so many great speakers from all areas of chemistry! Many thanks to Syuzanna Harutyunyan and the other organizers! 070
Per-Ola Norrby @peonor.bsky.social · 10/05/2026I’d prefer never to be compared to that man! In this case, they don’t expect shoes to survive the Wadlopen, we’re supposed to trash them afterwards! But I’ll probably keep them as souvenirs, with mud and all 😜 120
Per-Ola Norrby @peonor.bsky.social · 10/05/2026This is the first time I’ve been to a conference where shoes were included with the registration! #Wadlopen gromochem.web.rug.nl/wadlopen.php 140
Per-Ola Norrby @peonor.bsky.social · 10/05/2026I don’t use date-names for sorting, but it WOULD be easy to start with X followed by YYYYMMDD. On the other hand, that bug was probably fixed decades ago anyway … 100
Per-Ola Norrby @peonor.bsky.social · 10/05/2026Same here. Only letters, numbers, and underscores, and I don’t start filenames with a number because of a bug that caught me in the mid-90s … 130
Per-Ola Norrby @peonor.bsky.social · 05/05/2026Fingers crossed for the bumblebees 🐝, this could become a cherry 🍒 summer 🌞! 150
Per-Ola Norrby @peonor.bsky.social · 29/04/2026A short synthesis of aza-saccharins through anionic Fries Rearrangement. A fun project, thanks Mario Leypold and Karolina Kwapien for bringing me into this! doi.org/10.1039/d6sc...doi.orgRegioselective synthesis of aza-saccharins via anionic [1,4] Fries-type rearrangement of aryl sulfonimidoyl fluoridesA regioselective synthesis of aromatic and aliphatic aza-saccharins as cyclic sulfonimidamide derivatives is reported, starting from easily accessible aryl sulfonimidoyl fluorides and primary or secon... 000
Per-Ola Norrby @peonor.bsky.social · 17/04/2026“Polywater” was actually a thing my first years in Uni, some of my first CAS searches (ca. 1980). 010
Per-Ola Norrby @peonor.bsky.social · 13/04/2026Can we start differentiating between predicting enantioselectivity, and predicting the magnitude of the selectivity? The latter includes most recent ML models. You can identify it by the absence of negative numbers, and getting the same value for both enantiomers of the reagent/catalyst. 043
Per-Ola Norrby @peonor.bsky.social · 13/04/2026The difference is whether it is the nth or the first. Any subsequent review only has value if it adds something significant that no one wrote before. 140
Per-Ola Norrby @peonor.bsky.social · 13/04/2026Not uncommon. If a group wants to move into a subject properly, then they’ll start with an extensive literature search, and then may write a review based on that work. If it’s good quality, not a bad thing. 190
Per-Ola Norrby @peonor.bsky.social · 08/02/2026Tamao was definitely first, the actual oxidation is his. Fleming later added a stable phenyl group that can be converted to the essential fluoride before the oxidation. So it’s “Fleming modification of Tamao oxidation”, I’d call that Tamao-Fleming, original inventor first. 030
Per-Ola Norrby @peonor.bsky.social · 10/01/2026On my way home from the organic chemistry winter meeting #OKV39 in Norway. I really liked the format, morning ski, a few invited talks, and the rest of the presentations from young researchers, from bachelor projects to postdocs. And karaoke night yesterday 😊❄️🏔️ 120
Per-Ola Norrby @peonor.bsky.social · 06/01/2026Wow, the “hotel room” I got at #OKV39 is actually an apartment with two bedrooms and a living room that seats 11! I should have brought my family! Hopefully the temperature goes up to -15° tomorrow, for some morning skiing before the lectures. 140
Per-Ola Norrby @peonor.bsky.social · 06/01/2026On my way to Norway for my first Organic Chemistry Winter meeting (with skiing) 😊⛷️, really looking forward to it! #OKV39 050
Per-Ola Norrby @peonor.bsky.social · 06/01/2026Q2MM is the most accurate method for predicting asymmetric selectivity, but developing a reaction specific method requires significant time and expertise. Mikaela just made the process simpler by implementing a modified Fuerza. Thanks to Olaf and Paul for long collaboration doi.org/10.1021/acs....doi.orgRapid FF Generation via Hessian-Informed Initial Parameters and Automated RefinementThe FUERZA method and its modifications have greatly improved the generation of force field parameters from electronic structure calculations. The QFUERZA method presented here addresses some of the s... 090
Per-Ola Norrby @peonor.bsky.social · 15/10/2025We've inserted a modified FUERZA into Q2MM: doi.org/10.26434/che...doi.orgRapid FF Generation via Hessian-informed Initial Parameters and Automated RefinementThe FUERZA method and its modifications have greatly improved the generation of accurate force field parameters from electronic structure calculations. The QFUERZA method presented here addresses some... 010
Per-Ola Norrby @peonor.bsky.social · 14/10/2025@supersciencegrl.co.uk is now a part of our team, and visited Gothenburg for a week! Great to have her, and fun to have time for an outing 😊 040
Reposted by Per-Ola NorrbyNessa Carson @supersciencegrl.co.uk · 08/10/2025For the first time, I predicted a Nobel prize topic correctly! I did not pre-announce it on social media this year, but @cmjaeger.bsky.social and @peonor.bsky.social can attest that I did announce my guess in person to a room of chemists 🤣 #chemsky #MOFs 3161
Per-Ola Norrby @peonor.bsky.social · 09/10/2025Wrong this time. I did go for MOFs in the last two years, but this year I visited a Nobel Symposium that impressed me so much that I switched to Green Chem 😍. Well I’ll continue to hope for that. Well deserved, this year’s winners. 060
Per-Ola Norrby @peonor.bsky.social · 07/10/2025Time for the yearly prediction, I’m guessing Paul Anastas and John Warner for Green Chemistry. 240
Reposted by Per-Ola NorrbyLukas Sigmund @lukasmsigmund.bsky.social · 18/09/2025Now published in @angewandtechemie.bsky.social: Our hybrid QM/ML model for the prediction of the outcome of the aromatic thianthrenation reaction – with @peonor.bsky.social , @valencekjell.com, and many great colleagues from @astra-zeneca.bsky.social. onlinelibrary.wiley.com/doi/10.1002/...onlinelibrary.wiley.comPredicting Reaction Feasibility and Selectivity of Aromatic C─H Thianthrenation with a QM–ML Hybrid ApproachThis paper presents the open-source machine learning model PATTCH, which predicts the reaction feasibility and site-selectivity of aromatic C─H thianthrenation reactions. The model was built using bo.... 193
Per-Ola Norrby @peonor.bsky.social · 11/09/2025You need to couple this to a large database of chemical reactions. We're using it with an internal set of >48M experiments. 010
Per-Ola Norrby @peonor.bsky.social · 11/09/2025We've been working for a while on a Pareto-based search for reactions. This will bring back a diverse set of high-yielding reactions similar to the query, and will favor recent, high-scale reactions. Thanks Christoph for driving this! doi.org/10.1021/acs....doi.orgPrecedent Finder: Locating Pareto-Optimal ReactionsWe present Precedent Finder, a cheminformatics search tool for locating relevant reaction information in chemical reaction databases. Precedent Finder is a multiobjective optimization, in that it retr... 140
Per-Ola Norrby @peonor.bsky.social · 22/08/2025We've used Pareto selection to find a range of diverse and high-yielding precedents for synthesis reactions. Thanks for pushing this, Christoph Bauer! doi.org/10.26434/che...doi.orgPrecedent Finder – Locating Pareto-Optimal ReactionsWe present Precedent Finder, a cheminformatics search tool for locating relevant reaction information in chemical reaction databases. Precedent Finder is a multiobjective optimization, in that it re... 130
Per-Ola Norrby @peonor.bsky.social · 22/08/2025@lukasmsigmund.bsky.social has now enabled us not only to predict reaction selectivity with ML methods, but also the reaction feasibility, very nice work! Thanks for another great collaboration @valencekjell.com doi.org/10.26434/che...doi.orgPredicting Reaction Feasibility and Selectivity of Aromatic C–H Thianthrenation with a QM-ML Hybrid ApproachThe direct thianthrenation of aromatic C–H bonds is a valuable late-stage functionalization strategy that can assist, for example, the development of new drugs. We herein present a predictive computat... 091
Per-Ola Norrby @peonor.bsky.social · 19/08/2025Sometimes publication can take a while. @kannlab.bsky.social started this complex click chemistry while I was still an academic 🙂. doi.org/10.1039/D5OB...doi.orgRuthenium-catalyzed synthesis of tricyclic 1,5-fused 1,2,3-triazole piperazinesA double cyclization strategy, involving sequential ruthenium-catalyzed azide alkyne cycloaddition (RuAAC) and hydrogen borrowing, allows the rapid assembly of tricyclic 1,5-fused 1,2,3-triazole piper... 040
Reposted by Per-Ola NorrbyRobin Bedford @bedcatalysis.bsky.social · 11/07/2025As promised, postdoc positions at BristolUni.bsky.social available in homogeneous catalysis and computational chemistry exploring the replacement of palladium catalysts by Earth-Abundant Metals: www.bristol.ac.uk/jobs/find/de... #ChemSky #CompChemSky #ChemJobs #UKChemJobsbristol.ac.ukDetails | Working at Bristol | University of Bristol 11916
Per-Ola Norrby @peonor.bsky.social · 23/05/2025This came out of a Nobel symposium organized by @success-stockholm.bsky.social . Thirty eminent scientists from around the word have worked long on the text. 110
Per-Ola Norrby @peonor.bsky.social · 23/05/2025The Stockholm Declaration on Chemistry for the Future was launched today: www.stockholm-declaration.org I believe this will be an important guiding document in years to come. Please read, sign, and share!stockholm-declaration.orgHome | Stockholm Declaration 1135
Per-Ola Norrby @peonor.bsky.social · 22/05/2025This has been a spectacular conference, I’ve learned so much! A couple of satellite events remain, then I go home energized for our work on increasing sustainability! 020
Reposted by Per-Ola NorrbyLukas Sigmund @lukasmsigmund.bsky.social · 19/05/2025The thianthrenation reaction of aromatic C-H bonds now has its predictive ML model for assessing both reaction feasibility and selectivity. Many thanks to the amazing team, @peonor.bsky.social, @valencekjell.com, and my colleagues at @astra-zeneca.bsky.social. chemrxiv.org/engage/chemr...chemrxiv.orgPredicting Reaction Feasibility and Selectivity of Aromatic C–H Thianthrenation with a QM-ML Hybrid ApproachThe direct thianthrenation of aromatic C–H bonds is a valuable late-stage functionalization strategy that can assist, for example, the development of new drugs. We herein present a predictive computat... 041
Per-Ola Norrby @peonor.bsky.social · 24/04/2025Senior manager position available in medicinal chemistry at AstraZeneca Gothenburg: careers.astrazeneca.com/job/gothenbu... PS. Don't contact me, I'm not involved in hiring. Just follow the link.careers.astrazeneca.comSenior Director, Medicinal Chemistry Strategy at AstraZenecaLearn more about applying for Senior Director, Medicinal Chemistry Strategy at AstraZeneca 167
Per-Ola Norrby @peonor.bsky.social · 22/04/2025Big thanks to Helena Leuser for bringing me into this exciting collaboration. Synthetically useful, and I think we understand the reactivity difference between benzenes and pyridines. doi.org/10.1021/acs....doi.orgAccess to Phenolic Pyridopyridazinones and Phthalazinones Using THP Ether-Directed Ortho LithiationRoute scouting, process research and development, and large-scale synthesis of phenol-substituted pyridopyridazinones (azaphthalazinones) and phthalazinones are reported. For the introduction of one o... 010