It’s almost four years since the Nobel prize in chemistry went to Brian Kobilka and Robert Lefkowitz for their contribution in our understanding of G protein-coupled receptor (GPCR) signaling. They did their most exciting work by studying β2 adrenergic receptor (β2AR). Yet, despite the titanic efforts, the receptor still holds lots of secrets from us. Continue reading “β2AR: old horse’s new tricks”
Nicolaou et al. (JACS)
Nicolaou et al. does some medicinal chemistry on prostaglandins. Take a look at this Bobbit‘s salt protocol for deprotection/oxidation combo. It seems like they overload the reaction, compared to the original paper, which used 3 equivalents of the oxidant, but who cares if it works?
Moragas et al (ACIE)
Unprecedented (c) sigmatropic rearrangement of aziridines into sulfoximines.
And De Kimpe’s rearrangement for comparison.
Li et al (ACIE)
I’m not sure I would buy the proposed mechanism for the conversion below. The authors skip ‘−H2‘ step and get away with it by simply writing “the imine intermediate 44 […] underwent tautomerization and a key decarboxylation to generate 45 with higher oxidation state.” Something else is clearly happening under that −CO2 arrow and it’s not mere tautomerization.
Wappes et al (ACIE)
So similar, yet so different halogens. I guess, NaF won’t give anything useful under these conditions.
Couple of days ago I’ve come across a recent paper in Nature with quite an eyebrow-raising title “A trans-synaptic nanocolumn aligns neurotransmitter release to receptors“. The title made me think as if the authors have observed hitherto unknown structures in the synaptic cleft. That would be quite a sensation! But then this sentence comes in the abstract:
Now it looked like they propose some kind of neuroscience equivalent of dark matter. You know, something that nobody knows what it is, but that certainly must be there, otherwise there’s no explanation to what we see. Continue reading “Skepticism about synaptic nanocolumns”
I couldn’t find a free software that would easily do exactly what I want (see the subject). So here’s my ghetto solution, which can be easily automated. Continue reading “Extracting ChemDraw schemes as .cdx files from MS Word/Excel/PowerPoint documents”
Regular readers of this blog (all five of you, guys) have probably noticed that nothing appeared here in the past two months. As one could guess from the energy conservation law, my activity was mainly concentrated offline during this time. As a quick summary, I have left academia and landed an industry job as a research chemist in a small biotech company. And, quite surprisingly, this blog played a crucial role in this dramatic transition. Continue reading “Can blog writing get you a real job?”
It’s hard to imagine more intriguing title in Angewandte Chemie International Edition than “Astringent Mouthfeel as a Consequence of Lubrication Failure“. The first impression doesn’t deceive, and the paper is really interesting and fun to read. Somehow manifestations of molecular interactions in the macroscopic world never stop amusing me. And this communication is exactly about such emergent effect. Continue reading “Molecular tribology”