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Related Concept Videos

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...
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Reactions of α-Halocarbonyl Compounds: Nucleophilic Substitution01:17

Reactions of α-Halocarbonyl Compounds: Nucleophilic Substitution

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Nucleophilic substitution in α-halocarbonyl compounds can be achieved via an SN2 pathway. The reaction in α-haloketones is generally carried out with less basic nucleophiles. The use of strong basic nucleophiles leads to the generation of α-haloenolate ions, which often participate in other side reactions.
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Nucleophilic Addition to the Carbonyl Group: General Mechanism01:18

Nucleophilic Addition to the Carbonyl Group: General Mechanism

7.5K
The carbonyl carbon in an aldehyde or ketone is the site of a nucleophilic attack due to its electron-deficient nature. Depending on the strength of the incoming nucleophile, the reaction occurs via different mechanistic pathways.
A stronger nucleophile can directly attack the electrophilic center, the carbonyl carbon. The HOMO orbital of the nucleophile interacts with the LUMO (π* antibonding) orbital present on the carbonyl carbon. This interaction breaks the π bond and shifts the π...
7.5K
ortho–para-Directing Activators: –CH3, –OH, –⁠NH2, –OCH301:11

ortho–para-Directing Activators: –CH3, –OH, –⁠NH2, –OCH3

7.1K
All ortho–para directors, excluding halogens, are activating groups. These groups donate electrons to the ring, making the ring carbons electron-rich. Consequently, the reactivity of the aromatic ring towards electrophilic substitution increases. For instance, the nitration of anisole is about 10,000 times faster than the nitration of benzene. The electron-donating effect of the methoxy group in anisole activates the ortho and para positions on the ring and stabilizes the corresponding...
7.1K
Nucleophilic Aromatic Substitution of Aryldiazonium Salts: Aromatic SN101:14

Nucleophilic Aromatic Substitution of Aryldiazonium Salts: Aromatic SN1

2.6K
Treating arylamines with nitrous acid gives aryldiazonium salts that are effective substrates in nucleophilic aromatic substitution reactions. The diazonio group in these salts can be easily displaced by different nucleophiles, yielding a wide variety of substituted benzenes. The leaving group departs as nitrogen gas, and this easy elimination is the driving force for the substitution reaction.
In the Sandmeyer reaction, for example, the diazonio group is replaced by a chloro, bromo,...
2.6K
Aldehydes and Ketones with HCN: Cyanohydrin Formation Overview01:32

Aldehydes and Ketones with HCN: Cyanohydrin Formation Overview

3.7K
Cyanohydrins are compounds that contain –CN and –OH groups on the same carbon atom. They are formed by the nucleophilic addition of the cyanide ions to the carbonyl group. Cyanide ions are highly basic and nucleophilic and can be generated from HCN under aqueous conditions. However, since HCN is a weak acid, the number of cyanide ions generated is very small. Hence, a small amount of base or KCN/NaCN is added to HCN to increase the concentration of the cyanide ions in the reaction...
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Synthesis of Hypervalent Iodonium Alkynyl Triflates for the Application of Generating Cyanocarbenes
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Nucleophilic Isocyanation.

Taiga Yurino1, Takeshi Ohkuma1

  • 1Division of Applied Chemistry and Frontier Chemistry Center, Faculty of Engineering, Hokkaido University, Kita 13, Nishi 8, Sapporo, Hokkaido 060-8628, Japan.

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|March 24, 2020
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Summary
This summary is machine-generated.

This review explores nucleophilic isocyanation, a less common but direct method for synthesizing isonitriles. It highlights recent advancements and catalytic approaches for this versatile organic compound class.

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Area of Science:

  • Organic Chemistry
  • Organometallic Chemistry

Background:

  • Isonitriles are crucial in organic synthesis and organometallic chemistry.
  • Traditional synthesis relies on N-formamide dehydration.
  • Nucleophilic isocyanation offers an alternative route but is underdeveloped.

Purpose of the Study:

  • To review the concepts and recent progress in nucleophilic isocyanation.
  • To highlight the potential of this synthetic strategy.
  • To discuss catalytic isocyanation examples.

Main Methods:

  • Literature review of nucleophilic isocyanation methods.
  • Analysis of synthetic strategies and reaction mechanisms.
  • Compilation of recent advancements and catalytic applications.

Main Results:

  • Nucleophilic isocyanation provides a direct pathway to isonitriles.
  • Recent progress has expanded the scope and efficiency of this method.
  • Catalytic approaches are emerging as promising alternatives.

Conclusions:

  • Nucleophilic isocyanation is a valuable, albeit underutilized, synthetic tool.
  • Further research can enhance its practical application in isonitrile synthesis.
  • Catalytic methods represent a key area for future development.