105202-34-4Relevant articles and documents
Switching the regioselectivity of direct C-H arylation of 1,3-Dimethyluracil
Cernova, Miroslava,Pohl, Radek,Hocek, Michal
, p. 3698 - 3701 (2009)
An interesting dichotomy in the regioselectivity and mechanism of direct C-H arylation of 1,3-dimethyluracil was observed. Its Pd-catalyzed reactions with diverse aryl halides in the absence of Cui lead preferentially to 5-aryluracils, while reactions in
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.
Photolysis of 5-bromo-1,3-dimethyluracil in substituted benzenes
Seki,Matsuda,Bando,Ohkura
, p. 4737 - 4748 (2007/10/02)
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