97510-15-1Relevant academic research and scientific papers
The Synthesis of Di- and Tri-arylamines through Halogen Displacement by Base-activated Arylamines: Comparison with the Ullmann Condensation
Gorvin, John H.
, p. 1331 - 1336 (2007/10/02)
In dipolar aprotic solvents, nitranions derived from anilines of enhanced N-acidity displace fluorine from activated aromatic compounds at room temperature.Diarylamines thus produced are free from triarylamines, which are formed at higher temperatures when diarylamines, after N-deprotonation by potassium t-butoxyde or by the heavier alkali metal carbonates, similarly displace activated fluorine.Certain diarylamines can also be prepared by chlorine displacement in the presence of alkali metal carbonates.It is confirmed that such carbonates play only an auxiliary role in the Ullmann (copper-assisted) diarylamine synthesis conducted in dipolar aprotic solvents; they may indeed impede the reaction in some instances.
The Synthesis of Diarylamines by Nitro-group Displacement. Activation of Anilines containing Electron-withdrawing Groups by Potassium Carbonate
Gorvin, John H.
, p. 238 - 239 (2007/10/02)
Anilines of enhanced N-acidity can displace activated aromatic nitro-groups in dipolar aprotic solvents in the presence of potassium carbonate; the resulting diarylamines are generally obtained free of triarylamine and of the hydrogen displacement product.
