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Related Concept Videos

Electrophilic Aromatic Substitution: Nitration of Benzene01:20

Electrophilic Aromatic Substitution: Nitration of Benzene

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The nitration of benzene is an example of an electrophilic aromatic substitution reaction. It involves the formation of a very powerful electrophile, the nitronium ion, which is linear in shape. The reaction occurs through the interaction of two strong acids, sulfuric and nitric acid.
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Nitriles to Carboxylic Acids: Hydrolysis01:08

Nitriles to Carboxylic Acids: Hydrolysis

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Nitriles undergo acid-catalyzed hydrolysis or base-catalyzed hydrolysis to form a carboxylic acid. These reactions proceed via an amide intermediate.
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Preparation of Amines: Reduction of Oximes and Nitro Compounds01:29

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Oximes can be reduced to primary amines using catalytic hydrogenation, hydride reduction, or sodium metal reduction. The reduction of aliphatic and aromatic nitro compounds to primary amines takes place by either catalytic hydrogenation or by using active metals like Fe, Zn, and Sn in the presence of an acid.
Though catalytic hydrogenation can reduce nitrobenzenes, the reduction is nonselective in the presence of other functional groups. For instance, if nitrobenzene contains an aldehyde group,...
3.4K
Preparation of Nitriles01:12

Preparation of Nitriles

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One of the common methods to prepare nitriles is the dehydration of amides. This method requires strong dehydrating agents like phosphorous pentoxide or boiling acetic anhydride for converting amides to nitriles. Another reagent namely, thionyl chloride also accomplishes the dehydration of amides, where amide acts as a nucleophile. The first step of the mechanism involves the nucleophilic attack by the amide on the thionyl chloride to form an intermediate. In the next step, the electron pairs...
2.0K
Rate-Determining Steps03:08

Rate-Determining Steps

31.6K
Relating Reaction Mechanisms
In a multistep reaction mechanism, one of the elementary steps progresses significantly slower than the others. This slowest step is called the rate-limiting step (or rate-determining step). A reaction cannot proceed faster than its slowest step, and hence, the rate-determining step limits the overall reaction rate.
The concept of rate-determining step can be understood from the analogy of a 4-lane freeway with a short-stretch of traffic-bottleneck caused due to...
31.6K
Nitrosation of Enols01:19

Nitrosation of Enols

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The nitrosation reaction is one of the methods of preparing 1,2-diketones. The enol tautomer of the starting ketone reacts with sodium nitrite in hydrochloric acid, generating the 1,2-diketone after hydrolysis.
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Updated: May 30, 2025

A Direct, Regioselective and Atom-Economical Synthesis of 3-Aroyl-N-hydroxy-5-nitroindoles by Cycloaddition of 4-Nitronitrosobenzene with Alkynones
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A Direct, Regioselective and Atom-Economical Synthesis of 3-Aroyl-N-hydroxy-5-nitroindoles by Cycloaddition of 4-Nitronitrosobenzene with Alkynones

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Biocatalytic Strategies for Nitration Reactions.

Xiling Wang1, Matteo Aleotti2, Mélanie Hall2,3

  • 1Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy, Qingdao New Energy Shandong Laboratory, CAS Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China.

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Summary
This summary is machine-generated.

Enzymatic nitration offers a sustainable alternative for preparing nitro compounds, crucial in pharmaceuticals and dyes. This review explores mild, selective bio-based methods, addressing current challenges in green chemistry.

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Area of Science:

  • Organic Chemistry
  • Biocatalysis
  • Green Chemistry

Background:

  • Nitro compounds are vital synthetic intermediates for pharmaceuticals, pesticides, and dyes.
  • Current industrial nitro compound synthesis involves harsh conditions, poor selectivity, and environmental concerns.
  • Enzymatic methods for bionitration are underexplored but offer mild, selective alternatives.

Purpose of the Study:

  • To systematically analyze current biological/enzymatic methods for nitro compound preparation.
  • To provide an update on the state-of-the-art in enzymatic nitration.
  • To highlight challenges and inspire innovation in sustainable organic synthesis.

Main Methods:

  • Analysis of enzymatic oxidation of amine precursors.
  • Review of direct oxidative and non-oxidative enzymatic nitration methods.
  • Examination of reaction scope and mechanisms.

Main Results:

  • Biological methods offer mild reaction conditions and high selectivity for nitro compound synthesis.
  • Enzymatic nitration presents a promising avenue for sustainable chemical manufacturing.
  • Current research is exploring various enzymatic pathways for efficient bionitration.

Conclusions:

  • Enzymes hold significant potential to revolutionize nitro compound synthesis.
  • Further research into enzymatic nitration is crucial for advancing green chemistry.
  • This perspective serves as a guide for chemists developing sustainable synthetic routes.