## Abstract A method of preparing ^18^O‐labelled nicotinamide, involving cyanopyridine, H~2~ ^18^O, and 1,1′3,3′‐tetramethylguanidine as a catalyst is described. The desired product is produced in 91% chemical yield and 97.5% isotopic incorporation. Copyright © 2002 John Wiley & Sons, Ltd.
Preparation of 18O-labelled m-chloroperbenzoic acid
✍ Scribed by Stefan Jankowski; Rafat Kamiński
- Publisher
- John Wiley and Sons
- Year
- 1995
- Tongue
- French
- Weight
- 145 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0022-2135
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📜 SIMILAR VOLUMES
A method is described for the preparation of concentrated solutions (50–70%) of ^18^O‐labelled H~2~O~2~ in water. All singly ^2^H‐, ^13^C‐ and ^18^O‐labelled species of peroxyformic acid have been synthesized by the reaction of appropriately labelled formic acid and H~2~O~2~.
## Abstract 3‐Chloroperbenzoic acid‐^17^O,^18^O was prepared from 3‐chlorobenzoyl chloride and hydrogen peroxide‐^17^O,^18^O (obtained by subjecting water‐^17^O,^18^O. Nitrobenzene‐^15^N was reduced to aniline‐^15^N, which was oxidised by 3‐chloroperbenzoic acid to nitrosobenzene‐^15^N. ^15^N and ^
## Abstract A facile method for the preparation of ^18^O labeled ara‐C and ara‐U is described. The method provides a means of incorporating ^18^O specifically at the 2‐position of the nucleobase. The site and level of label was established using mass spectrometry.
BmMARY N-Fluoropyridinium triflate was labelled with 18P proceeding through N-trimethylsilylpyridinium triflate and [ 18F] F2 diluted to 1% in Ne. A typical experiment afforded this new fluorine-18 transfer reagent with up to 46% radiochemical yield. The specific activity of 18F-labelled N-fluoropyr