## Abstract The ifosfamide metabolite isophosphoramide mustard (IPM) was synthesized with isotopic enrichment at each nitrogen site. Glycine‐^15^__N__ was converted to 2‐chloroethylamine‐^15^__N__ hydrochloride (4 steps, 21% net yield) which was then reacted with phenyl dichlorophosphate to provide
Synthesis of 15N-labelled nornicotine and 15N-labelled nicotine
✍ Scribed by Giang Vo-Thanh; François-Xavier Felpin; Gilbert Nourrisson; Michel Trierweiler; Richard J. Robins; Jacques Lebreton
- Publisher
- John Wiley and Sons
- Year
- 2001
- Tongue
- French
- Weight
- 103 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0022-2135
- DOI
- 10.1002/jlcr.512
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
The synthesis of ^15^N‐labelled nornicotine 2 and ^15^N‐labelled nicotine 1 is described via the reductive aminocyclization of a 1,4‐ketoaldehyde with a corresponding amine in the presence of sodium cyanoborohydride. Yields of 30% and 26%, respectively, were obtained from 3‐bromopyridine. The ^15^N‐label has been easily introduced from ammonium‐^15^N‐labelled chloride as an inexpensive label source. As far as we are aware, this is the first synthesis of ^15^N‐labelled nicotine. Copyright © 2001 John Wiley & Sons, Ltd.
📜 SIMILAR VOLUMES
The synthesis of 15N labelled nylon 6 by anionic polymerization of Ecaprolactam is described. Labelling of this commercially important polymer should greatly enhance investigations of its morphology by techniques such as NMR, IR, and Raman spectroscopies.
A new technique was developed for the large-scale synthesis of lSN-labelled urea at low enrichment levels. The synthesis is based on nucleophilic displacement of the phenoxide ion from phenyl carbonate and uses anhydrouli Pmmonia as the nucleophile. In previous reports a copper catalyst was used; ho
## Abstract A five‐step synthesis of the neonicotinoid insecticide imidacloprid (**1**) labelled with ^15^N is reported in an overall yield of 10%. The stable isotope ^15^N was introduced in the pyridine part by reaction of ^15^NH~3~ with coumalic acid methyl ester (**2**) to ^15^__N__‐hydroxy nico
5-Nitro-2,4-dihydro-3H-l,2,4-triazol-3-one (NTO) has been synthesized in good yield with 15N at the 1 and 2 positions. The N-H coupling provides unequivocal assignments for I H and 15N NMR spectra and the acidic proton. The products of thermal decomposition at 270 O C were identified spectroscopical
Coniine-15N was obtained by the reductive amination of 5-0x0octanal using sodium cyanoborohydride and a m m o n i ~m -~~N bromide. Nornicotine-l'-15N resulted from a similar reductive aminution of 4-oxo-4-(3'-pyridyl)butanal. Merhybtion with formaldehyde and ,formic acid afforded n i ~o t i n e -I '