Peterson, John R. published the artcileCerium(IV)-induced nitration of cinnamic acids. Novel remote electrophilic substitution, Quality Control of 16909-09-4, the publication is Canadian Journal of Chemistry (1988), 66(7), 1670-4, database is CAplus.
The treatment of (E)-3,4-(MeO)2C6H3CH:CHCO2H with (NH4)Ce(NO3)6 in CF3CO2H afforded 79% (E)-4,5,2-(MeO)2(O2N)C6H2CH:CHNO2 (I). The unusual ipso substitution of the CO2H moiety by NO2 illustrated a new reaction manifold of Ce(IV). Four cinnamic acids were similarly nitrated to give products analogous to I, though in only 3-39% yields. The bidentate nitrato structure of the metal salt is believed to account for the nitrating ability of this system.
Canadian Journal of Chemistry published new progress about 16909-09-4. 16909-09-4 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Benzene,Ether, name is (E)-3-(2,4-Dimethoxyphenyl)acrylic acid, and the molecular formula is C11H12O4, Quality Control of 16909-09-4.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia