| 释义 |
Graebe-Ullman reaction Graebe-Ullman reaction[¦gre·bə ′u̇l·mən rē‚ak·shən] (organic chemistry) Production of fluorenone by boiling 2-benzoylbenzenediazonium salts in dilute acid solution. Reaction of 2-aminodiphenylamines with nitrous acid to form a benzotriazole which on heating loses nitrogen to form a carbazole. |