L.-C. Campeau @drlcsquare.bsky.social · 27/09/2026Busiest road in North America and the widest by some measures. 000 0
Reposted by L.-C. CampeauJake Yeston @jakeyeston.bsky.social · 28/08/2026Fascinating @science.org paper for chemsky from Ryan Shenvi’s group this week, where instead of making cyclopropane from a carbene and an olefin, they make it from three separate differentially reactive C1 sources in an iron-catalyzed sequence www.science.org/doi/10.1126/...science.orgIron-catalyzed [1+1+1] cyclopropanation by sequential coupling of an ester to two carbenesTraditional precious metal catalysis benefits from well-characterized inner-sphere elementary steps in which a single complex binds and unites substrates at the metal center. By contrast, base metal c... 0316 31
Reposted by L.-C. CampeauJake Yeston @jakeyeston.bsky.social · 25/08/2026Think about how every single drug is different, and the focus in the discovery period is on how to make it work, and then they toss this ridiculous wild-looking molecule at the process team and say “Ok make a ton of it. Exactly the same way every time. With nothing dangerous!” 1122 12
Reposted by L.-C. CampeauJake Yeston @jakeyeston.bsky.social · 25/08/2026These people should be on the news sometimes so you remember what they do. 192 9
Reposted by L.-C. CampeauJT Hendrix @bmorechemistry.bsky.social · 25/08/2026I love being honest with my medchem students when I say ‘I was discovery, that was easy- you only need 5mg.. but process? the art of making one molecule, perfectly, at manufacturing scale? it doesn’t get any harder or more beautiful than that.. now go read OPRD’ 062 6
Reposted by L.-C. CampeauJake Yeston @jakeyeston.bsky.social · 25/08/2026Plus they’re like you! They hate waste! It’s dangerous and expensive! And they’re making tons of material! Think about how they get that kind of precision while targeting safety and efficiency. 172 7
Reposted by L.-C. CampeauJake Yeston @jakeyeston.bsky.social · 25/08/2026Just think first about the necessary precision and reproducibility constraints. Literal tons of material, and every single pill—every single one!—has to have the exact molecule at the exact dose and purity, or you don’t get better the way you’re supposed to. 182 8
Reposted by L.-C. CampeauJake Yeston @jakeyeston.bsky.social · 25/08/2026If you follow me and you aren’t a chemist, just forget for a minute everything you think about pharma—for good or for ill—and briefly ponder how they made the drug you took last time you were sick. Not discovered its effects, but made it, at massive scale, under intense time pressure. 44620 46
L.-C. Campeau @drlcsquare.bsky.social · 23/08/2026Interesting read. The scale at which we’d be talking about here is sort of missing from this piece. 030 3
Reposted by L.-C. CampeauC&EN (Chemical & Engineering News) @cenmag.bsky.social · 23/08/2026A personalized messenger RNA (mRNA) cancer vaccine slowed the return and spread of melanoma when used alongside Merck & Co.’s checkpoint inhibitor Keytruda in a first for the nascent cancer vaccine space. #chemsky 🧪cen.acs.orgIn a first, an mRNA cancer vaccine succeeds in late-stage clinical trialThe vaccine from Merck and Moderna prevented melanoma recurrence in combination with Merck’s Keytruda 02710 27
Reposted by L.-C. CampeauKathryn VanArendonk @kvanaren.bsky.social · 12/08/2026I am really, really, really, REALLY excited to be able to share the cover of my book, as well a link so you can preorder it for when it comes out in April. Look at the ears!!!! wwnorton.com/books/978132... 3753381 533
Reposted by L.-C. CampeauDave Palmer @davepalmerusask.bsky.social · 24/06/2026Our manuscript describing a new 2nd-year laboratory experiment using #biocatalysis in organic chemistry is now available on ChemRxiv! Here's a little thread about the experiment, and how we developed it from work in my research lab. #ChemSky 🧵 /1chemrxiv.orgIntroducing Biocatalysis into the Second-Year Organic Laboratory: Using an Aldolase in the Synthesis of a Sunscreen Ingredient | ChemRxivBiocatalysis has become an important part of synthetic chemistry, particularly in the pharmaceutical industry. It is therefore important for chemistry students to learn about biocatalysis in their pro... 1258 25
Reposted by L.-C. CampeauDave Palmer @davepalmerusask.bsky.social · 24/06/2026Biocatalysis is a growing part of organic chemistry, and I introduced it to my second-semester organic class several years ago. We teach the aldol reaction, we teach about enamines, we teach catalysis. Students who understand the aldol can understand an aldolase. (Those who don't… don't.) /2static.klipy.comYoda: Learning You Are - Star WarsAlt: Yoda in The Empire Strikes Back with a caption "Learning you are". 141 4
L.-C. Campeau @drlcsquare.bsky.social · 22/06/2026Father’s Day shrimp roll with a springg salad. #ChemistsWhoCook 000 0
L.-C. Campeau @drlcsquare.bsky.social · 21/06/2026There are 2 types of mini golf families. Those who go one at a time and each player finishes the hole and those who play it like regular golf with away rules… only 1 is correct. #ChemistsWhoMiniGolf 000 0
Reposted by L.-C. Campeau/r/Habs @habsonreddit.bsky.social · 19/06/2026It’s a great day to be Canadian 🇨🇦 They win their first ever World Cup match 🔥 610013 100
L.-C. Campeau @drlcsquare.bsky.social · 18/06/2026Just for you. A little pasta… but I take a lot less of these now! 131 3
Reposted by L.-C. CampeauStu Cantrill @stuartcantrill.com · 18/06/2026The social-isolation socials that @drlcsquare.bsky.social and I ran for almost 2 years is one of the best things I've ever done (IMHO); and that all stemmed from #chemtwitter and the wider community on Twitter. That feeling of community has sadly not been replicated on #ChemSky. 5122 12
Reposted by L.-C. CampeauStu Cowan @stucowangazette.bsky.social · 27/05/2026Happy birthday to Canadiens goalie Jakub Dobes, who turns 25 today #Habs Montreal Gazette photo by John Mahoney 2443261 432
Reposted by L.-C. CampeauChemjobber @chemjobber.bsky.social · 23/05/2026Malfunctioning valve, that's a bad day 96112 61
Reposted by L.-C. Campeau/r/Habs @habsonreddit.bsky.social · 23/05/2026Juraj Slafkovsky on the Habs in the playoffs (from his latest NHL blog): “The whole city is alive with hockey...When I close my eyes, I imagine the Montreal Canadiens and I winning the Stanley Cup. I dream about it every day.” 1746546 465
Reposted by L.-C. CampeauLisa Jarvis @lisamjarvis.bsky.social · 19/05/2026My latest for @opinion.bloomberg.com on the rapidly escalating Ebola outbreak--and why the US's decimation of USAID, cuts at CDC and exit from the WHO could make an already-tough situation worse (gift link):bloomberg.comContaining Ebola Is Hard. The US Made It WorseA rapidly unfolding Ebola crisis in the Democratic Republic of Congo is a reminder of the value of maintaining robust global disease surveillance and response systems — and the dire consequences of we... 02015 20
Reposted by L.-C. CampeauCyclists Dismount Sign @mrstevious.eurosky.social · 07/05/2026If I won the lottery I wouldn’t tell any one but you might notice I’ve bought enough molymods to build molecules like this. 0102 10
Reposted by L.-C. Campeau/r/Habs @habsonreddit.bsky.social · 09/05/2026THE HABS BEAT THE BUFFALO SABRES IN GAME 2media.tenor.coma group of men are standing in a room talking to each other and a sign that says lets goooo .ALT: a group of men are standing in a room talking to each other and a sign that says lets goooo . 11155 115
L.-C. Campeau @drlcsquare.bsky.social · 09/05/2026Teamwork makes the dream work! #MerckChemistry 031 3
Reposted by L.-C. CampeauJake Yeston @jakeyeston.bsky.social · 07/05/2026In @science.org for chemsky this week, we've got a blockbuster result from the Merck process team engineering enzymes to make the extraordinarily complicated macrocyclic peptide enlicitide. Follows in the footsteps of sitagliptin and islatravir. www.science.org/doi/10.1126/...science.orgBiocatalytic cascades enable manufacture of the macrocyclic peptide enlicitideHistorically, many compelling therapeutic targets have been accessible only by injectable biologic drugs. Macrocyclic peptides, such as the proprotein convertase subtilisin/kexin type 9 inhibitor enli... 3315 31
L.-C. Campeau @drlcsquare.bsky.social · 08/05/2026static.klipy.comToo Kool for Skool KidALT: Too Kool for Skool Kid 020 2
Reposted by L.-C. CampeauNick Chiappini 🏳️🌈🧪 @ndchiappini.bsky.social · 07/05/2026Rule of cool 181 8
Reposted by L.-C. CampeauBethany Halford @bethanyhalford.bsky.social · 07/05/2026Biocatalysts can build big molecules. A team at Merck & Co. developed a suite of enzymes that stitch together their oral PCSK9 inhibitor enlicitide. My latest for @cenmag.bsky.social cen.acs.org/pharmaceutic... #chemsky 23113 31
Reposted by L.-C. CampeauJake Yeston @jakeyeston.bsky.social · 07/05/2026Honestly look at this molecule—it’s ridiculous 6362 36
L.-C. Campeau @drlcsquare.bsky.social · 08/05/2026www.science.org/doi/10.1126/...science.orgBiocatalytic cascades enable manufacture of the macrocyclic peptide enlicitideHistorically, many compelling therapeutic targets have been accessible only by injectable biologic drugs. Macrocyclic peptides, such as the proprotein convertase subtilisin/kexin type 9 inhibitor enli... 001 1
L.-C. Campeau @drlcsquare.bsky.social · 08/05/2026A milestone day for our team with the publication of our work on biocatalytic cascades for macrocyclic peptide manufacturing. This establishes a new beachhead in the synthesis of this important new modality for the industry! #MerckChemistry 171 7
L.-C. Campeau @drlcsquare.bsky.social · 21/04/2026Just fantastic news for th approval of this fixed dose combination with two compounds very close to my heart! Congrats to all who contributed to this important milestone for patients. #MerckChemistry www.merck.com/news/fda-app...merck.comFDA Approves Merck’s Once-Daily IDVYNSO™ (doravirine/islatravir) - Merck.comIDVYNSO is approved for adults with virologically suppressed HIV-1 with no history of virologic treatment failure and no known substitutions associated with resistance to doravirine IDVYNSO is the fir... 061 6
L.-C. Campeau @drlcsquare.bsky.social · 18/04/2026Pressure is a privilege. It means you have the opportunity to achieve something great. - Carey Price #QuoteOfTheDay 020 2
Reposted by L.-C. CampeauJohn Trant @trantteam.bsky.social · 17/04/2026mft metric f**k tons. A very important unit I use a lot. 191 9
Reposted by L.-C. CampeauNFL MEMES @nflmemewar.bsky.social · 03/04/2026#nfl #NFL #nflmemes #Chargers #Broncos #Chiefs #Raiders #moon 3461340 613
Reposted by L.-C. Campeaunagib lab @nagiblab.bsky.social · 26/03/2026If you like harnessing carbenes from di-chlorides, you’ll LOVE skeletal editing with tri-chlorides! Congrats to Bethany, Hojin, Victoria, and our collaborators from Chicago (Ethan & Mark Levin) and California (Anna, Zhang & Dave Olson)! Open access: authors.elsevier.com/a/1mqdE8jWHE... 2243 24
Reposted by L.-C. CampeauJake Yeston @jakeyeston.bsky.social · 19/03/2026In @science.org for chemsky this week, @shenvi.bsky.social group report that lutidinium and manganese are the Goldilocks reagents to help nickel and cobalt cross-couple two different olefins www.science.org/doi/10.1126/...science.orgCross- and branched-selective hydroalkenylation by metal hydride selectionControlled placement of branch points along carbon chains is a core capability in the synthesis of materials, agrochemicals, and pharmaceuticals. Metal hydride hydrogen atom transfer (MHAT) to alkenes... 1214 21
Reposted by L.-C. CampeauScott Bagley @bagphos.bsky.social · 14/03/2026Exceptionally proud of my friend @tehshik.bsky.social on winning the ACS David Evans Award If you’re at #ACSSpring2026 stop by for this symposium - it’s jam packed with tons of great chemistry #ChemSky 1314 31
L.-C. Campeau @drlcsquare.bsky.social · 15/03/2026They were pretty soft on the puck today. Lots of missed passes and turnovers. Sharks made the most of lucky bounces around the net. Also that 1st goal should have counted. 011 1