## Abstract We report here the syntheses of tetrazole‐^13^C and 1,2,4‐triazole‐1,2‐^15^N~2~ by simple, one‐step procedures using common, commercially available, isotopically‐labeled starting materials. tetrazole‐ ^13^C is conveniently prepared from K^13^CN and NaN~3~ in 70% yield, almost twice the
Synthesis of (±)-[1,1′-15N2, 2′-13C]-trans-3′-methylnicotine
✍ Scribed by Sarath R. Sirimanne; Vincent L. Maggio; Donald G. Patterson Jr.
- Publisher
- John Wiley and Sons
- Year
- 1992
- Tongue
- French
- Weight
- 445 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0022-2135
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✦ Synopsis
Abstract
The synthesis of (±)‐[1,1′‐^15^N~2~, 2′‐^13^C]‐trans‐3′‐methylnicotine is reported. ^15^N‐3‐Bromopyridine obtained from bromination of pyridine was formulated with nBuLi/[carbonyl‐^13^C]‐methyl formate. The resulting ^15^N‐Pyridine‐3‐[^13^C‐carbonyl]‐carboxaldehyde was reacted with ^15^N‐methylamine and then the resulting Schiff's base was condensed with succinic anhydride to give (±)‐[1,1′‐^15^N~2~, 5′‐^13^C]‐trans‐4′‐carboxycotinine. Reduction with lithium aluminium hydride and mesylation followed by reduction with Zn/Nal gave (±)‐[1,1′‐^15^N~2~, 2′‐^13^C]‐trans‐3′‐methylnicotine.
📜 SIMILAR VOLUMES
13 C 4 , 15 N 2 ]Pyrrolotriazinone, 1, was synthesized in six steps from ethyl (1,2,3,4-13 C 4 )acetoacetate and ( 15 N)ammonium hydroxide. A total of 1.3 g [ 13 C 4 , 15 N 2 ]pyrrolotriazinone was obtained in an overall yield of 17% based on isotopic ethyl acetoacetate. Chemical purity was determi
## Abstract [2‐^13^C, 2‐^14^C]2‐Aminoethanol hydrochloride was prepared in good yield from Na\*CN in a two step sequence by first converting the Na\*CN to OHCH~2~\*CN and then reducing the nitrile directly with a solution of borane‐tetrahydrofuran complex. The reaction procedure was simple and the
## REFERENCE DATA carbons, for various substituent groups and positions were carried out by gated decoupling with NOE. ## RESULTS AND DISCUSSION The I3C NMR chemical shifts of the compounds are shown in Tables 123; 'J(CH) and long-range coupling constants of 2, 9, 13 and 18, measured by gated d