Henri B. Kagan and Kenso Soai have been awarded the 2026 Nobel Prize in Chemistry for breakthroughs in asymmetric organic synthesis that have reshaped pharmaceutical manufacturing.
The Royal Swedish Academy of Sciences in Stockholm turned its attention to the building blocks of life on Wednesday. naming Henri B. Kagan and Kenso Soai as the recipients of the 2026 Nobel Prize in Chemistry. Their work addresses a fundamental chemical enigma that has persisted for more than a century: the spontaneous emergence of homochirality.
Heiner Linke. chair of the Nobel Committee for Chemistry. characterized the pair’s research as a definitive solution to this long-standing puzzle. Through their discovery of non-linear effects and autocatalysis in asymmetric organic synthesis. the two scientists have created reactions that Linke described as “spectacular.” Beyond the theoretical achievement. the committee noted that these processes have been decisive for chemists currently designing reactions for the manufacture of pharmaceuticals.
The collaboration links two continents and distinct academic traditions. Kagan, a French native, is affiliated with Université Paris-Sud in Orsay, France. Kenso Soai, now 95 and born in Japan, is associated with the Tokyo University of Science. His influence is so ingrained in the field that his specific experimental model is now widely recognized as the “Soai reaction.”.
This announcement arrives during a week of high-profile recognition in Stockholm. The Nobel cycle began Monday with the medicine prize. awarded to three scientists for their work in light-based tools for brain research. followed by Tuesday’s physics award. which honored a researcher’s work on rare neutrinos. As the chemistry prize is handed out. the schedule continues with the literature prize on Thursday. the peace prize on Friday. and finally. the Nobel Memorial Prize in Economic Sciences on Monday.
For Kagan and Soai. the honor comes with a share of the 12 million Swedish kronor—approximately $1.2 million—a sum that remains the same whether the prize is awarded to an individual. a small group. or an organization. Their recognition follows last year’s chemistry laureates. who were honored for developing molecular structures capable of trapping gases. providing a potential pathway for capturing greenhouse emissions or harvesting moisture in arid climates.
Nobel Prize Chemistry Henri B. Kagan Kenso Soai asymmetric organic synthesis Stockholm scientific discovery