## Abstract Two types of multi‐labelled urocanic acids with stable isotopes, __i.e.__, [3‐^2^H,1′,3′‐^15^N~2~]urocanic acid and [2,3,5′‐^2^H~3~,2′‐^13^C,1′,3′‐^15^N~2~]urocanic acid were synthesized by the enzymatic reaction of DL‐[3,3‐^2^H~2~,1′,3′‐^15^N~2~]histidine or DL‐[2,3,3,5′‐^2^H~4~,2′‐^13
Preparation of 15N-13C-fulminic acid
✍ Scribed by Rolf Wilmes; Manfred Winnewisser
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- French
- Weight
- 120 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0022-2135
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✦ Synopsis
Abstract
The precursor for the title compound was prepared in a three‐step synthesis. The ^13^C‐label was incorporated in the first step employing 2‐^13^C‐ethyl acetate and the ^15^N‐label in the last step, using ^15^N‐sodium nitrite. Upon pyrolysis the precursor forms three fragments, one of them being the title compound.
📜 SIMILAR VOLUMES
A synthesis of the title compound from /13Clparaformaldehyde and [15N)ammonium chloride V f 8 ethyl 2-(1 ,3-/2-13Cldithianyl) acetate 3a is described. Ethyl/3-13C13-oxopropanoate derived in sl'tu from 3a was converted by a stepwise Strecker procedure to DL-[ 2-13C,15Nlaspartic acid 7a.
## Abstract The preparation of the unsymmetrically isotope‐labelled title compounds was achieved in pure form for the first time. While mono‐^15^N‐cyanogen is available in a two‐step‐synthesis, the preparation of mono‐^13^C‐cyanogen requires five steps, the last step in both cases being the dehydra
The high resolution infrared spectrum of the linear centro-symmetric molecule 13 C 2 15 N 2 (cyanogen) has been measured in the region from 1950 to 2150 cm 01 . The n 3 fundamental band and the difference band n 1 -n 5 were observed in that region. Hot-band transitions arising from the n 5 , 2n 5 ,
## Abstract ^15^N‐enriched dihydroxamic acids (HONHCO(CH~2~)~__n__~CONHOH, __n__ = 0, 1, and 2) were prepared and their spectra NMR (^1^H, ^13^C, ^15^N) recorded in dimethyl sulfoxide (DMSO) solutions with the aim of determining ^15^N coupling constants (^15^N^1^H and ^15^N^13^C). The results sup
## Abstract 5‐[4‐^13^C,^15^N]‐ and 5‐[5‐^13^C,^15^N]Aminolevulinic acid (ALA) were simply synthesized in four steps by the condensation of [1‐^13^C,^15^N]‐ or [2‐^13^C,^15^N]glycine, respectively, with phthalic anhydride, followed by conversion to the chloride, coupling reaction with a three‐carbon