20039-99-0Relevant academic research and scientific papers
Efficient system for the preparation of [13N]labeled nitrosamines
Gomez-Vallejo, Vanessa,Kato, Koichi,Hanyu, Masayuki,Minegishi, Katsuyuki,Borrell, Jose I.,Llop, Jordi
, p. 1913 - 1915 (2009)
In the present Letter, a fast and reproducible method for the synthesis of N-[13N]nitrosamines is reported. The labeling strategy is based on trapping [13N]NO2- in an anion exchange resin. The reaction with secondary amines in the presence of Ph3P and Br2 led to the formation of the desired nitrosamines in short reaction times (2 min) with excellent radiochemical conversion (>45%). Final radiotracers were obtained after purification in good radiochemical yields (>30%, decay corrected). Radiochemical purity was above 99% in all cases.
PHOSPHORORGANISCHE VERBINDUNGEN 89 Quartaere Phosphoniumsalze mit Heteroatomen am Phosphor Herstellung, Eigenschaften und Elektroreduktive Spaltung
Horner, Leopold,Jordan, Manfred
, p. 209 - 214 (2007/10/02)
The half-potential of 35 quaternary phosphonium salts with one or more hetero-atoms attached to phosphorus are reported, and the fission products determined for the electroreduction of nine phosphonium salts.The influence of the ligands attached to phosphorus by hetero-atoms on both the half-wave potential and the course of the fission reaction is discussed.The order of precedence in the cleavage of the ligands at phosphorus is examined to determine whether a meaningful, qualitative order of stability for the corresponding ligands as free radicals can be deduced.
