French and Japanese Chemists Share 2026 Nobel Prize for Work on Molecular 'Handedness'

French chemist Henri Kagan and Japanese chemist Kenso Soai have been awarded the 2026 Nobel Prize in Chemistry for discoveries in asymmetric synthesis, a field concerned with building molecules that have a specific "handedness," or chirality, according to a profile published by Anadolu Agency.

Many molecules, including numerous drugs and natural compounds, can exist in two mirror-image forms, similar to a left and right hand. These forms, known as enantiomers, can behave very differently inside living organisms, meaning that producing only the correct, useful form of a molecule is often essential in fields such as pharmaceuticals.

Kagan's work helped establish foundational methods for using chiral catalysts to steer chemical reactions toward one of these mirror-image forms rather than producing an unwanted mixture of both, a long-standing challenge in organic chemistry.

Soai is known for research into how small chemical imbalances can be dramatically amplified, work that has also been cited as offering potential clues to one of biology's oldest puzzles: why life on Earth overwhelmingly uses only one of the two mirror-image forms of key molecules, such as amino acids, rather than a roughly equal mix of both.

The Anadolu Agency profile described the pair's combined body of work as having transformed the practice of asymmetric synthesis, a field that underpins the manufacture of many modern medicines, agrochemicals and specialty materials.

The report did not provide additional detail on the Nobel committee's specific citation language or on reaction from the two laureates following the announcement.