摘要:
Irradiation with visible light of a mixture of Fe(Cp)(CO)(2)I (Cp = eta(5)-cyclopentadienyl) with 1-methyluracil (1a), 5-fluoro-1-(tetrahydro-2-furyl)uracil (Ftorafur) (1b) or 6-azauridine-2'3'5'-triacetate (1c) in the presence of diisopropylamine affords complexes in which the Fe(Cp)(CO)(2) moiety is bound to the deprotonated N(3) atom of the uracil moiety. The crystal structure of 2b, made from 1b, was determined and is compared with the known structures of the alpha(A), alpha(B) and beta forms of Ftorafur and that of its eta(1)-Au complex. Complex 2b shows the shortest intramolecular C-H...O hydrogen bond between the tetrahydrofuran and uracil rings. The stereochemistry of this complex is also discussed.