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Peer-reviewedCC BY-NC-NDJournal of Isotopes

Synthesis of Stable Isotope Labeled Benzidine-D8

  1. 1Biomedical Testing Center, Shanghai Research Institute of Chemical Industry Co., Ltd, Shanghai 200062, China

Abstract

Aiming at the shortage of benzidine isotope internal standard reagents in environmental monitoring and food safety detection,an efficient synthetic method for stable isotope deuterium-labeled benzidine-D8 was developed. Benzidine-D8 was synthesized via two-step reactions: reduction of nitrobenzene-D5 to hydrazobenzene-D10 under alkaline conditions with zinc powder,followed by acid-catalyzed intramolecular rearrangement. The total yield of benzidine-D8 was 50.3% based on the molar amount of starting material nitrobenzene-D5. The product was characterized by HPLC and ESI-MS,with a chemical purity of 99.7% and deuterium isotopic abundance of 99.8 atom%. The results indicate that the synthesized benzidine-D8 is suitable as an internal standard for the quantitative determination of benzidine residues in soil,water and textile samples.

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BibTeX
@article{chen2026synthesis,
  title = {{Synthesis of Stable Isotope Labeled Benzidine-D8}},
  author = {Zhenjie CHEN and Zhongjie XU and Ruoning FAN},
  journal = {Journal of Isotopes},
  year = {2026},
  month = oct,
  doi = {10.7538/tws.2026.youxian.053},
  url = {https://doi.org/10.7538/tws.2026.youxian.053},
  note = {CC BY-NC-ND},
}
RIS
TY  - JOUR
TI  - Synthesis of Stable Isotope Labeled Benzidine-D8
AU  - Zhenjie CHEN
AU  - Zhongjie XU
AU  - Ruoning FAN
PY  - 2026
DA  - 2026/10/26
JO  - Journal of Isotopes
DO  - 10.7538/tws.2026.youxian.053
UR  - https://doi.org/10.7538/tws.2026.youxian.053
AB  - Aiming at the shortage of benzidine isotope internal standard reagents in environmental monitoring and food safety detection,an efficient synthetic method for stable isotope deuterium-labeled benzidine-D8 was developed. Benzidine-D8 was synthesized via two-step reactions: reduction of nitrobenzene-D5 to hydrazobenzene-D10 under alkaline conditions with zinc powder,followed by acid-catalyzed intramolecular rearrangement. The total yield of benzidine-D8 was 50.3% based on the molar amount of starting material nitrobenzene-D5. The product was characterized by HPLC and ESI-MS,with a chemical purity of 99.7% and deuterium isotopic abundance of 99.8 atom%. The results indicate that the synthesized benzidine-D8 is suitable as an internal standard for the quantitative determination of benzidine residues in soil,water and textile samples.
SN  - 1000-7512
ER  -