New approach for organic synthesis may apply to drug discovery

New approach for organic synthesis may apply to drug discovery

Nicoya raises $10 million in series a funding to make drug discovery digital Traditionally, organic chemistry has focused on the division between reactive molecular bonds and the inert bonds between carbon-carbon (C-C) and carbon-hydrogen (C-H). The inert bonds provide a strong, stable scaffold for performing chemical synthesis with the reactive groups. C-H functionalization flips this model on its head, making C-H bonds become the reactive sites. The aim is to efficiently transform simple, abundant molecules into much more complex, value-added molecules. Functionalizing C-H bonds opens new chemical pathways for the synthesis of fine chemicals -- pathways that are more direct, less costly and generate less chemical waste. The Davies lab has published a series of major papers on dirhodium catalysts that selectively functionalize C-H bonds in a streamlined manner. The current paper demonstrates the power of a dirhodium catalyst to efficiently synthesize a bioisostere of a benzene ring. A benzene ring is a two-dimensional (2D) molecule and a common motif in drug candidates. The bioisostere has similar biologicial properties to a benzene ring. It is a different chemical entity, however, with a 3D structure, which opens up new chemical territory for drug discovery. Previous attempts to exploit this bioisostere for biomedical research have been hampered by the delicate nature of the structure and the limited ways to make them. "Traditional chemistry is too harsh and causes the system to fragment," Davies explains. "Our method allows us to easily achieve a reaction on a C-H bond of this bioisostere in a way that does not destroy the scaffold. We can do chemistry that no one else can do and generate new, and more elaborate, derivatives containing this promising bioisostere." The paper serves as proof of principle that bioisosteres can serve as fundamental building blocks to generate an expanded range of chemical entities. "It's like getting a new Lego shape in your kit," Davies says. "The more Lego shapes you have, the more new and different structures you can build." Source:



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