Ei-ichi Negishi

Ei-ichi Negishi
Holger Motzkau · CC BY-SA 3.0 · source
Name	Ei-ichi Negishi
Native name	根岸 英一
Birth date	1935-07-12
Birth place	Saitama, Japan
Death date	2021-06-06
Death place	Iowa City, Iowa, United States
Nationality	Japanese
Fields	Chemistry
Alma mater	University of Tokyo, Iowa State University
Known for	Negishi coupling
Awards	Nobel Prize in Chemistry, Wolf Prize in Chemistry

Ei-ichi Negishi was a Japanese organic chemist best known for the discovery of the palladium-catalyzed cross-coupling reaction that bears his name, the Negishi coupling. He shared the 2010 Nobel Prize in Chemistry with Richard F. Heck and Akira Suzuki for development of palladium-catalyzed cross couplings in organic synthesis. Negishi's work transformed methodologies used in academic laboratories such as Harvard University, California Institute of Technology, and Massachusetts Institute of Technology and in industrial settings including Pfizer, Roche, and Merck & Co..

Early life and education

Negishi was born in Saitama Prefecture during the Empire of Japan era and grew up amid postwar changes involving Tokyo Electric Power Company, Ministry of Education reforms and regional redevelopment projects. He earned a Bachelor of Science from University of Tokyo where he studied under faculty influenced by pioneers such as Hiroshi Takahashi and encountered curricula shaped by figures linked to University of California, Berkeley visiting scholars. Negishi moved to the United States to pursue graduate studies at Iowa State University where he completed a Ph.D. under G. B. Porch-era laboratories and worked with mentors connected to networks including American Chemical Society conferences and the Guggenheim Fellowship community.

Academic career and positions

Negishi held academic appointments and visiting posts across institutions such as Hokkaido University, Purdue University, University of Tokyo, and Purdue University's collaborators, later joining the faculty of Purdue University as Distinguished Professor where he collaborated with groups from Stanford University, University of California, Los Angeles, and Columbia University. He served as a mentor to researchers who went on to positions at University of Cambridge, Yale University, University of Oxford, and Tohoku University, and participated in international symposia organized by International Union of Pure and Applied Chemistry and the Royal Society of Chemistry. Negishi also held industry-affiliated advisory roles with firms like Sumitomo Chemical, BASF, and Bayer, and was affiliated with national funding bodies including Japan Society for the Promotion of Science and the National Science Foundation.

Negishi coupling: discovery and mechanism

Negishi developed a palladium-catalyzed cross-coupling between organozinc reagents and organic halides that enabled stereospecific construction of carbon–carbon bonds, building on earlier work by Heck, Suzuki, and Kumada, Makoto pioneers. The reaction mechanism involves oxidative addition to a palladium(0) complex, transmetallation from an organozinc species to palladium(II), and reductive elimination to form the new carbon–carbon bond, with ligand and solvent effects described in studies by groups at ETH Zurich, University of Würzburg, and Tohoku University. Negishi's optimization included ligands related to phosphines developed by researchers like John K. Stille collaborators and palladium catalysts commercialized by Johnson Matthey, enabling broad scope across aryl, vinyl, and alkyl substrates employed in syntheses at GlaxoSmithKline, AstraZeneca, and academic total syntheses of natural products such as those targeted by labs at Scripps Research and Riken. Kinetic and mechanistic investigations referencing techniques from Nuclear Magnetic Resonance experts at Bruker and computational studies from groups at Princeton University further clarified transition states relevant to regioselectivity and stereochemistry.

Major awards and honors

Negishi received major international recognition including the 2010 Nobel Prize in Chemistry (shared with Richard F. Heck and Akira Suzuki), the Wolf Prize in Chemistry (shared), the Sir Geoffrey Wilkinson Prize, and the Chemical Society of Japan's major awards; academic honors also included fellowships from the Japan Academy and membership in the National Academy of Sciences (United States). He was honored by universities with honorary degrees from institutions such as University of Oxford, University of Cambridge, and Sorbonne University, and received medals and prizes presented by organizations such as the American Chemical Society, the Royal Society of Chemistry, and the Japan Society for the Promotion of Science.

Selected publications and impact

Negishi authored foundational papers in journals including Journal of the American Chemical Society, Angewandte Chemie International Edition, and Tetrahedron Letters that documented scope, mechanism, and applications of the Negishi coupling; representative publications influenced synthetic campaigns reported in reviews by Chemical Reviews and methodology compendia in Science. His work underpins syntheses reported by research groups at MIT, Harvard University, University of California, Berkeley, and University of Tokyo and has been applied to the production of pharmaceuticals developed by Novartis, Bristol-Myers Squibb, and Eli Lilly and Company. Citation metrics and patent filings through the United States Patent and Trademark Office reflect widespread adoption of Negishi-mediated strategies in multistep synthesis, agrochemical routes at Syngenta, and materials chemistry projects at IBM Research and Nitto Denko.

Personal life and legacy

Negishi balanced a private family life while maintaining global scientific engagement through societies such as the American Chemical Society, Royal Society of Chemistry, and Japan Academy; his students and collaborators established research programs at institutions including Purdue University, Stanford University, and Kyoto University. His legacy endures in methodology courses at Massachusetts Institute of Technology, laboratory protocols at University of California, Los Angeles, and textbooks used at University of Tokyo and Seoul National University, and through prizes and symposia named in his honor hosted by organizations like the Chemical Society of Japan and the Japanese Society for Organometallic Chemistry.

Category:1935 births Category:2021 deaths Category:Japanese chemists Category:Nobel laureates in Chemistry