Last month I posted a scheme from showing Oppolzer’s synthesis of racemic Lysergic acid and asked if you could identify reagents or intermediates G, I, and H. Below are the answers! You can read more here in the full reference: W. Oppolzer et al, Helv. Chim. Acta 1981, 64, 478–481
Written By: Dr John Studley
In 1981 Oppolzer published a short, racemic synthesis of Lysergic acid. Below is a scheme of the early steps in the synthesis. Can you identify reagents or intermediates G, I and H? Answers and a reference will be posted in late June, along with another problem. Enjoy!
Last month I posted a scheme from a paper by a team from Merck describing the synthesis of a soluble guanylate cyclase (cGC) stimulator of interest for the treatment of hypertension and asked if you could identify reagents or intermediates B, F, and the target compound H. Below are the answers! You can read more here in
A recent paper by a team from Merck describe the synthesis of a soluble guanylate cyclase (cGC) stimulator of interest for the treatment of hypertension. Can you identify reagents or intermediates B, F and the target compound H? Answers and a reference will be posted in May, along with another problem. Enjoy!
Last month I posted a scheme from a paper by Jonathan H. George et al at the University of Adelaide describing a biomimetic total synthesis of the Rhododendron meroterpenoids rubiginosins A and G and asked if you could identify reagents or intermediates B, D, E and H. Below are the answers! You can read more here
I often stumble across interesting chemistry when I peruse my twitter feed. It’s not only rich in new chemistry highlights and ASAP links to journal articles but also chemists sharing their own experiences with both new and existing methodology- good, bad, and sometimes with pictures!- a dimension missing from just reading peer-reviewed journal articles and,
As with all things in life, necessity is the mother of invention. Synthetic chemistry, as an enabling science, will always rise to the challenge and meet the increasing demand for simpler and more efficient methods to construct fundamentally important structures and functional groups, particularly if these units are conserved privileged pharmacophores imparting biological activity to
A recent paper by Jonathan H. George et al at the University of Adelaide describes a biomimetic total synthesis of the Rhododendron meroterpenoids rubiginosins A and G. Can you identify reagents or intermediates B, D, E and H? Answers and a reference will be posted in a month, along with another problem. Enjoy!
Any new synthetic methodology, as well as advancing the state of the art, should also consider a few other key criteria, one of which is to build complexity from common feedstock materials- ideally using cheap and environmentally friendly reagents and raw materials. Unactivated (or unsubstituted) olefins, used largely by the polymer industry, represent a rich
My first experiences of radical chlorination where something of a baptism of fire. Generation of chlorine radicals from chlorine gas under intense UV irradiation in a custom-made photochemical flow reactor was as scary as it sounds to a very young, yet to be trained chemistry technician starting out in his carrier in the chemical industry.
