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Brominated hydroxyquinoline as a photolabile protecting group with sensitivity to multiphoton excitation
Olesya D Fedoryak1, Timothy M Dore
1Department of Chemistry, University of Georgia, Athens, GA 30602-2556, USA.
Organic Letters
|September 27, 2002
Abstract:
The synthesis and photochemistry of a new photolabile protecting group for carboxylic acids based on 8-bromo-7-hydroxyquinoline (BHQ) is described. BHQ possesses a greater single photon quantum efficiency than 4,5-dimethoxy-4-nitrobenzyl ester (DMNB) and 6-bromo-7-hydroxycoumarin-4-ylmethyl (Bhc), and it has sufficient sensitivity to multiphoton-induced photolysis for use in vivo. Its increased solubility and low fluorescence make it quite useful as a caging group for biological messengers. [structure: see text]