110225-42-8Relevant articles and documents
Protonation of the electron adducts of pyrimidine derivatives
Ohkura,Seki
, p. 1024 - 1027 (2007/10/03)
Photolyses of 5-substituted 1,3-dimethyluracils (1a-e: a, R = F; b, R = Cl; c, R = H; d, R = CH3; e, R = p-xylyl) in p-xylene in the presence of trifluoroacetic acid (TFA) afforded 5,6-dihydro-1,3-dimethyl-6-p-methylbenzyluracils (3a-d), 5,6-dihydro-1,3-dimethyl-5-p-methylbenzyluracils (4a-e), and 5,6-dihydro-1,3-dimethyluracils (5a-e) in varying ratios. It is suggested that the 6-isomers (3) are derived from the O(4)-protonated electron adducts of 1, while 4 and 5 are the products from the C(6)-protonated electron adducts. The ratio of (4 + 5) vs. 3 depends on the ionization potentials of the O(4)-protonated intermediates. The formation of 4 + 5 increases with increasing concentration of TFA.
Photolysis of 5-bromo-1,3-dimethyluracil in substituted benzenes
Seki,Matsuda,Bando,Ohkura
, p. 4737 - 4748 (2007/10/02)
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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.