Neurotransmitter amino acid—oxobenzo[f]benzopyran conjugates: synthesis and photorelease studies
摘要:
A series of fluorescent conjugates of neurotransmitter amino acids, such as P-alanine, tyrosine, 3,4-dihydroxyplienylalanine (DOPA) and glutamic acid, were prepared by reaction with a suitable fluorophore, namely 1-chloromethyl-9-methoxy-3-oxo-3H-benzo[f]benzopyran. The photophysical properties of the resulting ester bioconjugates were evaluated as well as the stability to photolysis at different wavelengths of irradiation (250, 300, 350 and 419 nm). (C) 2008 Elsevier Ltd. All rights reserved.
Phototriggering of neuroactive amino acids from 5,6-benzocoumarinyl conjugates
作者:Maria José G. Fernandes、Susana P.G. Costa、M. Sameiro T. Gonçalves
DOI:10.1016/j.tet.2011.01.090
日期:2011.4
Uncaging of several neuroactive amino acids, namely beta-alanine, tyrosine, 3,4-dihydroxyphenylalanine (DOPA) and glutamic acid from the corresponding 5,6-benzocoumarinyl conjugates was carried out by irradiation at different wavelengths and in different solvent systems. The release of the various amino acids was faster in ACN/HEPES buffer mixtures and for the tyrosine conjugate, an increase in the photolysis reaction rates and the quantitative uncaging of the amino acid was associated with increasing water content in the solvent mixture. (C) 2011 Elsevier Ltd. All rights reserved.