Sun, Sen published the artcileSynthesis of 4,4′-difluorobenzophenone by diazotization and oxidation of 4,4′-diaminodiphenylmethane, COA of Formula: C13H10F2, the publication is Huaxue Yu Nianhe (2003), 262-263, database is CAplus.
4,4′-Difluorobenzophenone was prepared by diazotization of 4,4′-diaminodiphenylmethane in fluoroboric acid and oxidation The target product was obtained in 84% yield under optimal conditions. An economic and effective production synthetic route was introduced and discussed.
Huaxue Yu Nianhe published new progress about 457-68-1. 457-68-1 belongs to catalysis-chemistry, auxiliary class Fluoride,Benzene, name is Bis(4-fluorophenyl)methane, and the molecular formula is C14H21BO2, COA of Formula: C13H10F2.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia