## Abstract Hydrogenation of carbon‐^13^C dioxide over ruthenium‐on‐alumina catalyst at 300–400°C produced methane‐^13^C, which was passed with excess ammonia over platinum at 1000°C to give, after absorption of the product in sodium hydroxide solution, sodium cyanide‐^13^C in 90% overall yield. Me
Syntheses with stable isotopes: Sodium cyanide-13C
✍ Scribed by Thomas W. Whaley; Donald G. Ott
- Publisher
- John Wiley and Sons
- Year
- 1975
- Tongue
- French
- Weight
- 238 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0022-2135
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✦ Synopsis
Abstract
Sodium cyanide‐ ^13^C has been prepared in 65–70% overall yield from carbon‐^13^C monoxide in a three‐step synthesis proceeding through isopropyl formate‐ ^13^C and formamide‐ ^13^C as intermediates. Several. methods for the dehydration of formamide have been investigated.
📜 SIMILAR VOLUMES
The synthesis of DL-2-amino-3-methyl-Cbutanoic-3,4-13C3 acid (DL-valine-13Cj) is described. Acetonitrile-2-13C was converted to 2methyl-13C-Z-thiazoline, which was dialkylated with methyl -13C iodide to give 2-(isopropyl-13C3) -2 -thiazoline. hydrolysis o f the isopropylthiazoline afforded 2-methyl
## Abstract A three‐step synthesis of thymlne‐2,6‐^13^C~2~ from urea‐^13^C, sodium cyanide‐^13^C, and α‐bromopropionic acid is described. The last reaction involves hydrogenation of α‐cyano‐^13^C‐propionylurea‐^13^C in aqueous acetic acid and produces thymine‐2,6‐^13^C~2~ in 50–60% yield. The mecha
## Abstract Hydrogenation of carbon dioxide at mild temperature and preasure utilizing a copper‐zinc‐chromium catlyst has been developed for small‐ and large‐scale preparations of methanol and is applicable to various isotope isomers.
## Abstract Urea has been prepared from the reaction of carbon monoxide and ammonia in the presence of sulfur. The reaction has been applied to the synthesis of urea‐^13^C, urea‐^12^C, and urea‐^13^C‐^15^N~2~.
## Abstract Rhodium‐catalyzed carbonylation of methanol at mild temperature and pressure has been developed for small‐ and large‐scale preparations of the carbon isotope isomers of acetic acid.