Photocleavage of o-nitrobenzyl ether derivatives for rapid biomedical release applications
作者:Moon Suk Kim、Scott L. Diamond
DOI:10.1016/j.bmcl.2006.05.013
日期:2006.8
The externally controlled cleavage of covalently linked prodrugs, proteins, or solid-phase formulation vehicles offers potential advantages for controlled drug or gene delivery. A series of o-nitrobenzyl ester compounds (1 8) were synthesized to allow a systematic study of photolability. The o-nitrobenzyl ester was strictly required for photolability, while imido esters were not photolabile. The degradation kinetics of 1-o-phenylethyl ester was an order of magnitude faster than that of o-nitrobenzyl ester. Tosylate, phosphate, and benzoate derivatives of 1-o-nitrophenylethyl displayed similar photolability (> 80% decomposition within 10 min at 3.5 mW/cm(2) at 365 nm). O-o-Nitrobenzyl O'O"-diethyl phosphate displayed the fastest decomposition at photoirradiation condition (3.5 mW/cm(2), 365 nm) suitable for biological systems. We report the synthesis and photo-decomposition of 1-o-nitrophenylethyl derivatives amenable for the creation of photolabile prodrugs or formulation particles for drug depots, DNA condensation, or tissue engineering applications. (c) 2006 Elsevier Ltd. All rights reserved.