@article{VirtaKochRoslundetal.2005,
  author    = {Virta, P. and Koch, Andreas and Roslund, M. U. and Mattjus, P. and Kleinpeter, Erich and Kronberg, L. and Sjoholm, R. and Klika, Karel D.},
  title     = {Synthesis, characterisation and theoretical calculations of 2,6-diaminopurine etheno derivatives},
  issn      = {1477-0520},
  year      = {2005},
  abstract  = {Four derivatives of 2,6-diaminopurine (1) were synthesised and characterised. When 1 was reacted with chloroacetaldehyde, 5-aminoimidazo[2,1- i] purine (2), 9-aminoimidazo[2,1-b]purine (3), 9-aminoimidazo[1,2- a]purine (4) and diimidazo[2,1-b: 2', 1'-i]purine (5) were formed. The purified products (3 - 5) were fully characterised by MS, complete NMR assignments as well as fluorescence and UV spectroscopy. The purified, isolated yields of these products ( 3 - 5) varied from 2.5 to 30\%. The relative stability of different tautomers was investigated by theoretical calculations. Fluorescence characteristics are also discussed and compared to the starting material 1 and a reference molecule 2-aminopurine},
  language  = {en}
}