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March 22, 2011
A 200-Proof Shot of Medicinal Chemistry
For the chemists out there in the crowd: have you been looking for a paper to read that's filled, beginning to end, with good, solid, old-fashioned medicinal chemistry? Look no further than this one, on recent reports of isosteres. This sort of thing is still the heat of med-chem as it's practiced in the real world - messing around with the structure of an active molecule to see what you can improve and what you can get away with.
If you're not a medicinal chemist, the idea of a bioisostere is some chemical group that can substitute for another one. Classic examples are things like swapping in a tetrazole ring for a carboxylic acid or an oxadiazole for an ester. Here are some examples - even if your organic chemistry is shaky, you can see the similarities across these structures. If it works, you can change the other properties of your molecule (solubility, stability, selectivity) for the better while still keeping the key features that made the original group valuable for activity. It's not something that just automatically comes through every time - sometimes there just is no substitute - but it works enough of the time to be one of the essential techniques.
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