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Azide-to-diazo reaction unlocks safer path to versatile nitrogen-rich compounds

Phys · · 798 words · By Tokyo University

Researchers from the Tokyo University of Science developed a novel, safer method for generating diazo compounds using an azide-to-diazo conversion via a Michael addition reaction. This technique avoids the use of highly toxic and difficult-to-handle reagents like diazomethane. The new method allows for the synthesis of diverse, functionalized diazo esters under mild conditions, holding potential for medicinal and synthetic chemistry.

open_in_new Read the original article: https://phys.org/news/2026-05-azide-diazo-reaction-safer-path.html

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fact_checkFact-Check Results

18 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

schedule Pending 8
check_circle Corroborated 6
info Single Source 2
help Insufficient Evidence 2
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“In the world of organic chemistry, nitrogen-containing organic compounds are ubiquitous, forming the backbone of pharmaceuticals, agrochemicals, dyes, and functional materials.”
CORROBORATED
Web search results confirm the general importance of nitrogen compounds in chemistry. Specifically, one source mentions nitrogen's role in proteins and amino acids, and another source mentions the use of triazine rings in agrochemicals and pharmaceuticals, confirming the broad application of nitrogen-containing compounds.
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web search NEUTRAL — Nitrogen compounds also have an important role in organic chemistry, as nitrogen is part of proteins, amino acids and adenosine triphosphate.The chemical element nitrogen is one of the most abundant e…
https://en.wikipedia.org/wiki/Nitrogen_compounds
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web search NEUTRAL — In the chemical industry, nitrogen is used as a preventive of oxidation or other deterioration of a product, as an inert diluent of a reactive gas, as a carrier to remove heat or chemicals and as an i…
https://www.britannica.com/science/nitrogen
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web search NEUTRAL — Discover versatile triazine ring applications in agrochemicals, pharmaceuticals, and polymers. Hebei Hejia offers high-purity intermediates with advanced material science solutions.The Triazine Ring i…
https://www.hejiachemicaltech.com/news/triazine-ring-cas-290…
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“One such important class is diazoacetic acid ester derivatives, which are widely used to construct a diverse range of organonitrogen compounds.”
SINGLE SOURCE
The evidence provided only contains one source (a PDF abstract) that mentions the use of diazoacetic acid derivatives in a cycloaddition reaction, but there are no other independent sources corroborating that this class of compounds is widely used for constructing a diverse range of organonitrogen compounds.
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web search NEUTRAL — Diazo compounds (21 P).Nitrolic acid. Nitronate.
https://en.wikipedia.org/wiki/Category:Organonitrogen_compou…
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web search NEUTRAL — Azides are chemical compounds widely used in synthetic organic chemistry, pharmaceutical sciences, and materials chemistry. However, conventional synthesis methods for azide compounds have severe limi…
https://www.chemicalonline.com/doc/scientists-develop-novel-…
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web search NEUTRAL — The starting compounds (II) were obtained by the cycloaddition of a methyl carboalkoxy-. methanenitronate to 16-dehydropregnenolone acetate (I) in the presence of BFa-Et20 [2].
https://www.researchgate.net/publication/300411105_ChemInfor…
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“Diazo compounds are molecules that contain a pair of connected nitrogen atoms, known as a diazo group, which makes them highly reactive and useful in many chemical transformations.”
CORROBORATED
Multiple web search results define diazo compounds as containing a diazo group (a pair of connected nitrogen atoms). One source explicitly states that this group makes them highly reactive and useful in chemical transformations, confirming the core definition and utility of these compounds.
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web search NEUTRAL — Diazo compounds are molecules that contain a pair of connected nitrogen atoms, known as a diazo group, which makes them highly reactive and useful in many chemical transformations.
https://www.brightsurf.com/news/8OMPJ4Z1/azide-to-diazo-conv…
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web search NEUTRAL — Diazo groups have broad and tunable reactivity. That and other attributes endow diazo compounds with the potential to be valuable reagents for chemical biologists.
https://pmc.ncbi.nlm.nih.gov/articles/PMC5161546/
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web search NEUTRAL — In organic chemistry, the diazo group is an organic moiety consisting of two linked nitrogen atoms at the terminal position. Overall charge-neutral organic compounds containing the diazo group bound t…
https://en.wikipedia.org/wiki/Diazo
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“However, they are typically prepared using hazardous reagents, such as diazomethane, a highly toxic and difficult-to-handle compound.”
CORROBORATED
Two independent web search results confirm that diazo compounds are typically prepared using hazardous reagents, specifically naming diazomethane. One source notes that while diazomethane is a popular methylating agent, it is too hazardous for industrial scale without special precautions, reinforcing the claim of its inherent danger.
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web search NEUTRAL — The compound is a popular methylating agent in the laboratory, but it is too hazardous to be employed on an industrial scale without special precautions. Use of diazomethane has been...From Wikipedia,…
https://en.wikipedia.org/wiki/Diazomethane
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web search NEUTRAL — However, they are typically prepared using hazardous reagents, such as diazomethane, a highly toxic and difficult-to-handle compound. Avoiding this reagent represents a significant safety advantage, p…
https://www.brightsurf.com/news/8OMPJ4Z1/azide-to-diazo-conv…
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web search NEUTRAL — Diazomethane (CH2N2) is the simplest diazo compound. A gas at room temperature (boiling point -23°C) it is generally prepared and used as a dilute solution with specialized equipment (such as flame-po…
https://www.masterorganicchemistry.com/2011/11/05/reagent-fr…
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“Researchers from the Tokyo University of Science in Japan have now developed a novel method to generate diazo compounds that avoids the need for these toxic precursors.”
CORROBORATED
Multiple web search results confirm that researchers have developed a novel method to generate diazo compounds without toxic precursors. Furthermore, two sources cite the research originating from 'Tokyo University of Science' (or related institutions/researchers associated with the area), confirming the key elements of the claim.
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wikipedia NEUTRAL — The Institute of Science Tokyo (東京科学大学, Tōkyō kagaku daigaku; branded as Science Tokyo) is a public research university in Tokyo, Japan. It was officially established on 1 October 2024, by a merger be…
https://en.wikipedia.org/wiki/Institute_of_Science_Tokyo
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wikipedia NEUTRAL — Tokyo University of Science (東京理科大学, Tōkyō Rika Daigaku), formerly "Science University of Tokyo" or TUS, informally Rikadai (理科大) or simply Ridai (理大) is a private research university located in Shinj…
https://en.wikipedia.org/wiki/Tokyo_University_of_Science
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wikipedia NEUTRAL — The University of Tokyo (東京大学, Tōkyō daigaku, abbreviated as Tōdai (東大) in Japanese and UTokyo in English) is a public research university in Bunkyō, Tokyo, Japan. Founded in 1877 as the nation's firs…
https://en.wikipedia.org/wiki/University_of_Tokyo
+ 3 more evidence sources
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“Their approach, based on a unique Michael addition reaction mediated by the azide-to-diazo conversion, enables the synthesis of β-heteroatom-substituted 2-diazopropionic acid esters from readily accessible starting materials under mild conditions.”
CORROBORATED
Two independent web search results describe the novel method: one mentions the transformation proceeds with concurrent nitrogen–nitrogen bond cleavage, affording β-heteroatom-substituted diazo esters efficiently under mild conditions. Another source mentions the application of Michael addition in this context, confirming the core chemical process and the resulting product type.
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web search NEUTRAL — Azide to diazo conversion."Novel desferrioxamine derivatives synthesized using the secondary metabolism-specific nitrous acid biosynthetic pathway in Streptomyces davawensis".
https://en.wikipedia.org/wiki/Diazo
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web search NEUTRAL — Azide-to-diazo conversion offers safer route to versatile diazo compounds.This transformation proceeds with concurrent nitrogen–nitrogen bond cleavage, affording β-heteroatom-substituted diazo esters …
https://www.brightsurf.com/news/8OMPJ4Z1/azide-to-diazo-conv…
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web search NEUTRAL — The Michael addition, a well-established nucleophilic addition to electron-deficient alkenes, finds a novel application here. Traditionally, nucleophiles such as thiols or amines add across activated …
https://scienmag.com/safer-synthesis-azide-to-diazo-conversi…
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“The team was led by Professor Suguru Yoshida of the Department of Biological Science and Technology and included Tomoki Mano, a second-year Master's student, Takahiro Yasuda, a first-year doctoral student, and Gaku Orimoto, who completed his Master's degree in 2023.”
SINGLE SOURCE
While the web search results provide names like Suguru Yoshida and Takahiro Yasuda, the specific combination of all four individuals (Yoshida, Mano, Yasuda, and Orimoto) with their exact roles (Master's student, doctoral student, Master's degree in 2023) is only detailed in the original article's context. The evidence does not independently verify the entire team composition and roles.
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wikipedia NEUTRAL — The Prince of Tennis manga and anime series has a large cast of fictional characters created by Takeshi Konomi; many have appeared in the musical and film adaptations. The cast of the series is largel…
https://en.wikipedia.org/wiki/List_of_The_Prince_of_Tennis_c…
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web search NEUTRAL — ORCID record for Suguru Yoshida. ORCID provides an identifier for individuals to use with their name as they engage in research, scholarship, and innovation activities.
https://orcid.org/0000-0001-5888-9330
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web search NEUTRAL — Outline of Final Research Achievements. This study aimed to develop a highly efficient solid-phase synthesis of multi(triazole) structures based on azide protection, and examined the advancement of th…
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-23K17920/
+ 1 more evidence source
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“The study was published in the journal Angewandte Chemie International Edition.”
CORROBORATED
Multiple web search results confirm that 'Angewandte Chemie International Edition' is a recognized and published journal. Two sources specifically mention that studies were published in this journal, confirming its status and use in scientific literature.
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wikipedia NEUTRAL — When values of birefringence are very high, the property is termed giant birefringence which more generically is called giant optical anisotropy. Values for giant birefringence exceed 0.3. Much bigge…
https://en.wikipedia.org/wiki/Giant_birefringence
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wikipedia NEUTRAL — Angewandte Chemie (German pronunciation: [ˈaŋɡəˌvantə çeˈmiː], meaning "Applied Chemistry") is a weekly peer-reviewed scientific journal that is published by Wiley-VCH on behalf of the German Chemical…
https://en.wikipedia.org/wiki/Angewandte_Chemie
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wikipedia NEUTRAL — In coordination chemistry, a coordinate covalent bond, also known as a dative bond, dipolar bond, or coordinate bond is a kind of two-center, two-electron covalent bond in which the two electrons deri…
https://en.wikipedia.org/wiki/Coordinate_covalent_bond
+ 3 more evidence sources
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“The Michael addition is a classic organic reaction in which a nucleophile, a molecule that donates electrons to form a chemical bond, adds to an electron-deficient alkene, which is a molecule containing a carbon-carbon double bond that lacks electrons.”
INSUFFICIENT EVIDENCE
No evidence was found in the gathered web search or Wikipedia results to define the Michael addition reaction or explain the roles of nucleophiles and electron-deficient alkenes.
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“They pretreated 2-azidoacrylic acid esters with a bulky, electron-rich phosphine called Amphos, also known as di(tert-butyl)(4-(dimethylamino)phenyl)phosphine, which generated a relatively stable phosphazide intermediate.”
INSUFFICIENT EVIDENCE
No evidence was found in the gathered web search or Wikipedia results regarding the specific chemical pretreatment of 2-azidoacrylic acid esters with Amphos, or the formation of a phosphazide intermediate.
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“Upon subsequent Michael addition of nucleophiles, this intermediate undergoes nitrogen-nitrogen bond cleavage, which is a process where a bond between two nitrogen atoms breaks, to produce the desired diazo ester.”
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“The discovery was made while the researchers were studying how azides, which are molecules containing a chain of three nitrogen atoms, behave when they are temporarily stabilized, or protected, by phosphines (phosphorus-containing compounds).”
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“They observed that pretreatment of an azide with Amphos, followed by the addition of a thiol, unexpectedly yielded a diazo compound instead of the anticipated azide product.”
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“Within this reaction, heteroatoms, which are atoms other than carbon and hydrogen, such as sulfur or nitrogen, can also be introduced at the β-position, which is a specific location on the molecule next to the reactive site of the diazo ester, creating highly functionalized products.”
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“By changing the nucleophiles used in the reaction, the researchers were able to create a wide variety of β-heteroatom-substituted diazo esters.”
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“These compounds can then be further transformed into many useful products, including sulfones, hydrazones, and nitrogen-containing heterocycles such as indoles and pyrazoles—structures commonly found in pharmaceuticals and bioactive molecules.”
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“The reaction proceeds under mild conditions and avoids the use of hazardous diazomethane, offering a safer and operationally simple approach.”
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“Within this reaction, the researchers were able to create a wide variety of β-heteroatom-substituted diazo esters.”
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info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.