title: Photodimerization in pyrimidine-substituted dipeptides.
abstract: Ten N(epsilon)-glycylornithineamide derivatives have been synthesized containing various N(alpha)-linked pyrimidine-1-ylacetyl groups which can undergo (2pi + 2pi) photodimerization on irradiation with UV light at 254 nm. The dimerization efficiency of the free and bound pyrimidine groups was compared in aqueous solution: it was dependent on the substitution of the pyrimidine ring. N(alpha),N(alpha')-bis-(uracil-1-ylacetyl)-(N(epsilon)-glycylornithineamide) and N(alpha),N(alpha')-bis-(5-bromouracil-1-ylacetyl)-(N(epsilon)-glycylornithineamide) were identified as possible candidates for optical data storage.
authors.affiliation: Danish Polymer Centre, Risø National Laboratory, Roskilde.
authors.forename: Brian
authors.initials: B
authors.lastname: Lohse
authors.forename: P S
authors.initials: PS
authors.lastname: Ramanujam
authors.forename: Søren
authors.initials: S
authors.lastname: Hvilsted
authors.forename: Rolf H
authors.initials: RH
authors.lastname: Berg
mesh_terms: D000085:Acetates / Q000737:chemistry; D019281:Dimerization; D004151:Dipeptides / Q000737:chemistry*; D010777:Photochemistry; D011743:Pyrimidines / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000085:Acetates; D004151:Dipeptides; D011743:Pyrimidines