One-pot radiosynthesis of [13N]urea and
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Katsushi Kumata; Makoto Takei; Masanao Ogawa; Koichi Kato; Kazutoshi Suzuki; Min
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Article
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2009
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John Wiley and Sons
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French
β 203 KB
## Abstract The aim of this study was to develop a practical labeling method of [^13^N]ligands using noβcarrierβadded [^13^N]NH~3~ with high specific activity. [^13^N]urea analogues [^13^N]1a and [^13^N]2a or [^13^N]carbamate [^13^N]3a were synthesized by reacting isocyanate 5a, carbamoyl chloride