Rational design of dinitroxide biradicals for efficient cross-effect dynamic nuclear polarization
作者:Dominik J. Kubicki、Gilles Casano、Martin Schwarzwälder、Sébastien Abel、Claire Sauvée、Karthikeyan Ganesan、Maxim Yulikov、Aaron J. Rossini、Gunnar Jeschke、Christophe Copéret、Anne Lesage、Paul Tordo、Olivier Ouari、Lyndon Emsley
DOI:10.1039/c5sc02921j
日期:——
A series of 37 dinitroxide biradicals have been prepared and their performance studied as polarizing agents in cross effect DNP NMR experiments at 9.4 T and 100 K in 1,1,2,2-tetrachloroethane...
Reactions of ethyl and phenyl chloroformate with adenosine derivatives as an entry to N6-ureido-linked spin-labeled adenosine and other modified adenosines
作者:Kentaro Anzai、John B. Hunt、Gerald Zon、William Egan
DOI:10.1021/jo00143a022
日期:1982.10
4-Isocyano-2,2,6,6-tetramethylpiperidin- 1-oxyl: A Valuable Precursor for the Synthesis of New Nitroxides
To enrich the limited set of isonitriles typically employed, 4-isocyano-2,2,6,6-teramethylpiperidin-1-oxyl (1) is proposed as an isonitrile bearing a nitroxyl moiety. Isocyanide 1 was used in some reactions characteristic of isonitriles. Isoselenocyanate, amides (products of Passerini and Ugi reactions), and tetrazole derivative were obtained. The EPR spectra of the urea derivative 5b and a product of an Ugi reaction 7 (both dinitroxides) were analyzed.
Structure and properties of N,N?-di-(2,2,6,6-tetramethyl-1-oxyl-4-piperidyl)-N-diethylphosphorylurea