Nobel Prize 2022: Click Chemistry And Bioorthogonal Innovations.pdf

The Nobel Prize in Chemistry 2022 was awarded to Carolyn R. Bertozzi, Morten Meldal, and K. Barry Sharpless for their development of click chemistry and bioorthogonal chemistry. The Royal Swedish Academy of Sciences emphasized that this year's prize highlights the importance of conceptualization alongside significant discoveries in modern chemistry.

Click chemistry involves creating molecules using a set of powerful, selective, and modular reactions that are efficient and reliable. This approach was inspired by the need for streamlined processes in combinatorial chemistry, particularly for drug development. K. Barry Sharpless introduced this concept in 2001, proposing robust reactions that could efficiently synthesize complex structures with high fidelity.

The criteria for suitable click-type reactions include modularity, simplicity, high yields, benign solvents, and non-toxic by-products. These reactions should be stereospecific, have a strong thermodynamic driving force, and proceed rapidly to completion. The concept draws from natural processes of joining smaller units together and aims to accelerate the discovery of useful substances.

Sharpless, along with Hartmuth C. Kolb and M.G. Finn, identified several potential reactions that meet these criteria, such as nucleophilic ring opening of strained heterocycles and cycloadditions involving unsaturated structures. This innovative approach has significantly impacted chemistry and related fields by enabling the efficient creation of complex molecules.