title: 2-Oxo-2H-benzo[h]benzopyran as a new light sensitive protecting group for neurotransmitter amino acids.
abstract: Aiming at the development of new benzopyran-based photocleavable protecting groups, novel chloromethylated and hydroxymethylated 2-oxo-2H-benzo[h]benzopyran derivatives bearing a methoxy substituent were designed and used in the synthesis of a series of fluorescent bioconjugates, by linking through an ester or urethane bond to several model neurotransmitter amino acids (glycine, alanine, beta-alanine and gamma-aminobutyric acid, GABA). The resulting fluorescent bioconjugates with emission in the visible range and high fluorescent quantum yields, were subjected to photocleavage reaction in methanol/HEPES buffer (80:20) solution at different wavelengths of irradiation (250, 300, 350 and 419 nm) and photocleavage kinetic data were obtained.
authors.affiliation: Centro de Química, Universidade do Minho, Campus de Gualtar, 4710-057, Braga, Portugal.
authors.forename: Ana M S
authors.initials: AM
authors.lastname: Soares
authors.forename: Susana P G
authors.initials: SP
authors.lastname: Costa
authors.forename: M Sameiro T
authors.initials: MS
authors.lastname: Gonçalves
mesh_terms: D000596:Amino Acids / Q000138:chemical synthesis / Q000737:chemistry*; D003374:Coumarins / Q000138:chemical synthesis / Q000737:chemistry*; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000737:chemistry*; D008027:Light; D015394:Molecular Structure; D018377:Neurotransmitter Agents / Q000138:chemical synthesis / Q000737:chemistry*; D011789:Quantum Theory; D013237:Stereoisomerism
chemical_list: D000596:Amino Acids; D003374:Coumarins; D005456:Fluorescent Dyes; D018377:Neurotransmitter Agents