105202-35-5Relevant academic research and scientific papers
Aqueous and Visible-Light-Promoted C-H (Hetero)arylation of Uracil Derivatives with Diazoniums
Liu, An-Di,Wang, Zhao-Li,Liu, Li,Cheng, Liang
, p. 16434 - 16447 (2021/11/16)
Direct C5 (hetero)arylation of uracil and uridine substrates with (hetero)aryl diazonium salts under photoredox catalysis with blue light was reported. The coupling proceeds efficiently with diazonium salts and heterocycles in good functional group tolerance at room temperature in aqueous solution without transition-metal components. A plausible radical mechanism has been proposed.
Effect of bromides on the anomalous photoarylation of 5-halo-1,3-dimethyluracils
Seki, Koh-Ichi,Ohkura, Kazue,Fukai, Yuki,Terashima, Masanao
, p. 341 - 346 (2007/10/02)
Photolysis of 5-chloro- and 5-fluoro-1,3-dimethyluracil in toluene in the presence of a bromide (e.g., p-dibromobenzene, 1,2-dibromoethane, and benzyl bromide) and an acid (trifluoroacetic acid, HBr) afforded 1,3-dimethyl-5-tolyluracils and the 6-isomers as the isomeric mixture. 5-Arylation occurred most favorably at ortho, while meta-isomers were preferential products in 6-arylation. The 5-isomers are suggested to be derived from uracils excited in the singlet states, while the 6-isomers are presumed to result from the uracils excited in the triplet states.
ACID CATALYZED PHOTOREACTION OF 5-CHLORO-1,3-DIMETHYLURACIL WITH SUBSTITUTED BENZENES
Ohkura, Kazue,Matsuda, Kohki,Seki, Koh-ichi
, p. 1371 - 1376 (2007/10/02)
The photo-induced substitution of 5-chloro-1,3-dimethyluracil with substituted benzenes, affording the corresponding 5-aryl-1,3-dimethyl-uracils in appreciable yields, was significantly promoted by the addition of trifluoroacetic acid to the reaction mixture.
PHOTOLYSIS OF 5-BROMO-1,3-DIMETHYLURACIL IN SUBSTITUTED BENZENES
Seki, Koh-ichi,Bando, Yuko,Ohkura, Kazue
, p. 195 - 196 (2007/10/02)
Photolysis of 5-bromo-1,3-dimethyluracyl in toluene, xylene and anisole afforded the anormalously substituted 6-aryl-1,3-dimethyluracils beside the expected products 5-aryl-1,3-dimethyluracils, while the reaction with veratrole occured exclusively at the 5-position of the uracil ring.
