Synthesis and Electrochemical Complexation Studies of 1,8-Bis(azacrown ether)anthraquinones
摘要:
Treatment of 1,8-difluoroanthraquinone with aza-12-crown-4 and aza-15-crown-5 in DMF at 50 degrees C affords the disubstituted anthraquinones 6 and 7 in good yields. A similar methodology has been used to prepare the lipophilic diaza-12-crown-4 anthraquinone systems 12-14. Compounds 6 and 7 exhibit enhanced sodium and lithium binding upon electrochemical reduction to the corresponding mono- and dianions. Both 6 and 7 form 1:1 complexes with Na+. However, with the smaller Li+ cation, both compounds form 1:2 ligand:Li+ complexes. Cation binding enhancements for Li+ and Na+ are very large with K-2/K-1 values as high as 10(5).
Synthesis and Electrochemical Complexation Studies of 1,8-Bis(azacrown ether)anthraquinones
摘要:
Treatment of 1,8-difluoroanthraquinone with aza-12-crown-4 and aza-15-crown-5 in DMF at 50 degrees C affords the disubstituted anthraquinones 6 and 7 in good yields. A similar methodology has been used to prepare the lipophilic diaza-12-crown-4 anthraquinone systems 12-14. Compounds 6 and 7 exhibit enhanced sodium and lithium binding upon electrochemical reduction to the corresponding mono- and dianions. Both 6 and 7 form 1:1 complexes with Na+. However, with the smaller Li+ cation, both compounds form 1:2 ligand:Li+ complexes. Cation binding enhancements for Li+ and Na+ are very large with K-2/K-1 values as high as 10(5).
Synthesis and Electrochemical Complexation Studies of 1,8-Bis(azacrown ether)anthraquinones
作者:L. Echegoyen、Raphael C. Lawson、Ciro Lopez、J. de Mendoza、Yehia Hafez、T. Torres
DOI:10.1021/jo00093a013
日期:1994.7
Treatment of 1,8-difluoroanthraquinone with aza-12-crown-4 and aza-15-crown-5 in DMF at 50 degrees C affords the disubstituted anthraquinones 6 and 7 in good yields. A similar methodology has been used to prepare the lipophilic diaza-12-crown-4 anthraquinone systems 12-14. Compounds 6 and 7 exhibit enhanced sodium and lithium binding upon electrochemical reduction to the corresponding mono- and dianions. Both 6 and 7 form 1:1 complexes with Na+. However, with the smaller Li+ cation, both compounds form 1:2 ligand:Li+ complexes. Cation binding enhancements for Li+ and Na+ are very large with K-2/K-1 values as high as 10(5).