Syntheses of potential spin probes for biomembranes - tempo and proxyl nitroxides of lithocholic acid
作者:Sharmila Banerjee、Girish K. Trivedi
DOI:10.1016/s0040-4020(01)92284-7
日期:1992.11
The synthesis of a steroidal spin label 10 containing a tempo nitroxide group in the side chain of lithocholic acid 1 is reported. This is the first report of a tempo nitroxide in d steroidal side chain. The methodology involved d Wittig condensation between the steroidal phosphonium ylide 7 and tempone 9. The synthesis Of d proxyl nitroxide 16 with the proxyl group in the side chain of 1 is also described. A mild oxidation of 16 to the corresponding 3-keto spin label 17 in high yield is also achieved.
A rhodopsin pigment containing a spin-labeled retinal
作者:Geoffrey E. Renk、Yat Sun Or、Rosalie K. Crouch
DOI:10.1021/ja00254a041
日期:1987.9
Deactivation of Excited States of Kynurenine Covalently Linked to Nitroxides
作者:Yuri P. Tsentalovich、Vadim V. Yanshole、Yuliya F. Polienko、Sergey V. Morozov、Igor A. Grigor’ev
DOI:10.1111/j.1751-1097.2010.00841.x
日期:2011.1
work, we report the synthesis of conjugates of a natural UV filter kynurenine (KN) with nitroxides (KN‐RNO• conjugates) and the study of their photochemical properties in aqueous and methanol solutions. Due to the spin‐exchange interaction between KN and nitroxide moieties, the triplet lifetimes in conjugates are much shorter than in KN molecule, but the triplet quantum yields are significantly higher