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Arenediazonium substitution reactions occur when the diazonium group is substituted by various functional groups such as halides, hydroxyl, nitrile, etc. For instance, arenediazonium salts react with copper(I) salts of chloride, bromide, or cyanide to form corresponding aryl chlorides, bromides, and nitriles. These reactions are named Sandmeyer reactions. Although the mechanism of this reaction is complicated, as illustrated in Figure 1, they are believed to progress via an aryl copper...
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Baeyer–Villiger oxidation converts aldehydes to carboxylic acids and ketones to esters. The reaction uses peroxy acids or peracids and is often catalyzed by acid. The reaction is named after its pioneers, Adolf von Baeyer and Victor Villiger. The reaction is achieved by a wide range of peracids such as m-chloroperoxybenzoic acid (mCPBA), perbenzoic acid (C6H5COOOH), peracetic acid (CH3COOOH), hydrogen peroxide (H2O2), and tert-butyl hydroperoxide (t-BuOOH).
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Carbonyl compounds and primary amines undergo reductive amination first to produce imines, followed by secondary amines in the same reaction mixture, using selective reducing agents like sodium cyanoborohydride or sodium triacetoxyborohydride. Reductive amination produces different degrees of substitution of amines depending on the starting amine substrate.
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Deaminative Giese-type reaction.

Panpan Ma1, Zhangkai Cui1, Hongjian Lu2,3

  • 1State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, China.

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|August 4, 2025
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Summary
This summary is machine-generated.

This study introduces a new method for forming carbon-carbon bonds using primary aliphatic amines as alkyl sources. By modifying the aza-Michael reaction, chemists can now create complex molecules more efficiently.

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Area of Science:

  • Organic Chemistry
  • Synthetic Chemistry

Background:

  • Primary aliphatic amines are versatile building blocks in organic synthesis.
  • Utilizing amines as alkyl sources for C(sp³)-C(sp³) bond formation is challenging.

Purpose of the Study:

  • To develop a novel method for C(sp³)-C(sp³) bond construction using primary aliphatic amines.
  • To redirect the aza-Michael reaction pathway towards C-C bond formation.

Main Methods:

  • Integration of nitrogen-atom deletion into the aza-Michael reaction.
  • Utilizing O-diphenylphosphinylhydroxylamine as a nitrogen-deletion reagent.
  • Coupling of primary aliphatic amines with electron-deficient olefins.

Main Results:

  • Successfully transformed primary aliphatic amines into alkyl sources for C(sp³)-C(sp³) bond construction.
  • Achieved broad functional group compatibility and high efficiency under mild conditions.
  • Demonstrated a reaction time of under 10 minutes.

Conclusions:

  • The developed method effectively bridges the aza-Michael and Giese-type reactions.
  • This approach enhances synthetic utility by linking product spaces through a unified precursor library.
  • Offers a powerful new tool for synthesizing complex organic molecules.