Mitsunobu

Part of speech: noun, adjective

Definitions

1. A named organic chemistry reaction that converts alcohols into esters, ethers, or other compounds using a phosphine and an azodicarboxylate reagent
2. An organic synthesis method, named after its Japanese chemist, that swaps the hydroxyl group of an alcohol for another group under mild conditions
3. A chemical transformation in which an alcohol is activated by a phosphine and an azodicarboxylate so that a nucleophile can replace it with inversion of configuration

Etymology: Mitsunobu is a surname, and it became a chemistry term because of the man who bears it. In 1967, the Japanese chemist Oyo Mitsunobu, working with Masaru Yamada, published a method for converting an alcohol into another functional group in a single step, using triphenylphosphine together with an azodicarboxylate reagent. Chemists began calling it the Mitsunobu reaction, and the name stuck as the standard label for the method. The word has no meaning outside that laboratory context. It is a proper noun used as a technical term, in the same way that "Grignard" and "Diels-Alder" name reactions after their discoverers. Its use is a tribute to the discovery rather than a description of what the reaction does, which is why a chemist meeting it for the first time learns the name before learning the chemistry.