Synthesis, properties, and hepatic metabolism of strongly fluorescent fluorodipyrrinones
作者:Stefan E. Boiadjiev、Zachary R. Woydziak、Antony F. McDonagh、David A. Lightner
DOI:10.1016/j.tet.2006.04.046
日期:2006.7
From non-fluorescent 8-H fluorophenyldipyrrinones, highly fluorescent (phi(F) 0.4-0.6) analogs have been synthesized by reaction with 1,1'-carbonyidiimidazole to bridge the dipyrrinone nitrogens and form an NiN'-carbonyldipyrrinone (3H,5H-dipyrrolo[1,2-c:2',1'-f]-pyrimidine-3,5-dione). Amphiphilic, water-soluble 8-sulfonic acid derivatives are then obtained by reaction with coned H2SO4. The resulting fluorinated and sulfonated N,N'-carbonyl-bridged dipyrrinones, isolated as their sodium salts, are potential cholephilic fluorescence and F-19 MRI imaging agents for use in probing liver and biliary metabolism. After intravenous injection in the rat they were excreted rapidly and largely unchanged in bile. F-19 NMR spectroscopy of a pentafluorophenyl-tosylpyrrolinone synthetic precursor exhibited rarely seen diastereotopicity. (c) 2006 Elsevier Ltd. All rights reserved.