作者:Olga Frolow、Bela E. Bode、Joachim W. Engels
DOI:10.1080/15257770701490522
日期:2007.11.26
For EPR measurements of RNA, DNA, or proteins, the occurrence of the paramagnetic species is necessary. The aim of this work is to improve the synthesis of two different EPR spinlabels 2,2,6,6-tetramethyl-3,4-dehydro-piperidin-N-oxyl-4-acetylene (TEMPA) 6 and (15) N-labeled TEMPA 6* and their coupling to uridine. The yield of the synthesis of TEMPA could be increased to 40 % and the second nitroxide 2,2,6,6-tetramethyl-3,4-dehydro-piperidin-(15) N-oxyl-4-acetylene 6* could be synthesized with a yield of 11 %.