{"title":"Which Molecule Is Involved in the Nitrosation Reaction of Pharmaceuticals: NO or NO2?","authors":"Ryota Nomura, Hideyuki Sogo, Takuma Onai, Misako Iwazawa, Tomohiro Kaku, Osamu Uchikawa","doi":"10.1021/acs.oprd.6c00108","DOIUrl":null,"url":null,"abstract":"<p>We have previously\r\nclearly identified atmospheric nitrogen oxides\r\n(NOx) as a key factor in nitrosamine contamination in pharmaceuticals.\r\nTo implement more appropriate countermeasures, the nitrosation potential\r\nof nitrogen monoxide (NO) and nitrogen dioxide (NO<sub>2</sub>)─the\r\nprimary components of NOx─was evaluated using short-term and\r\nlong-term gas flow model experiments. The results revealed that NO<sub>2</sub> is required for the nitrosation reaction to occur.</p>","PeriodicalId":55,"journal":{"name":"Organic Process Research & Development","volume":"30 8","pages":"2228–2232"},"PeriodicalIF":3.3000,"publicationDate":"2026-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Organic Process Research & Development","FirstCategoryId":"92","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acs.oprd.6c00108","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2026/7/17 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
引用次数: 0
Abstract
We have previously
clearly identified atmospheric nitrogen oxides
(NOx) as a key factor in nitrosamine contamination in pharmaceuticals.
To implement more appropriate countermeasures, the nitrosation potential
of nitrogen monoxide (NO) and nitrogen dioxide (NO2)─the
primary components of NOx─was evaluated using short-term and
long-term gas flow model experiments. The results revealed that NO2 is required for the nitrosation reaction to occur.
期刊介绍:
The journal Organic Process Research & Development serves as a communication tool between industrial chemists and chemists working in universities and research institutes. As such, it reports original work from the broad field of industrial process chemistry but also presents academic results that are relevant, or potentially relevant, to industrial applications. Process chemistry is the science that enables the safe, environmentally benign and ultimately economical manufacturing of organic compounds that are required in larger amounts to help address the needs of society. Consequently, the Journal encompasses every aspect of organic chemistry, including all aspects of catalysis, synthetic methodology development and synthetic strategy exploration, but also includes aspects from analytical and solid-state chemistry and chemical engineering, such as work-up tools,process safety, or flow-chemistry. The goal of development and optimization of chemical reactions and processes is their transfer to a larger scale; original work describing such studies and the actual implementation on scale is highly relevant to the journal. However, studies on new developments from either industry, research institutes or academia that have not yet been demonstrated on scale, but where an industrial utility can be expected and where the study has addressed important prerequisites for a scale-up and has given confidence into the reliability and practicality of the chemistry, also serve the mission of OPR&D as a communication tool between the different contributors to the field.