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Amino acids03:42

Amino acids

89.1K
Amino acids are the monomers that comprise proteins. Each amino acid has the same fundamental structure, which consists of a central carbon atom, or the alpha (α) carbon, bonded to an amino group (NH2), a carboxyl group (COOH), and to a hydrogen atom. Every amino acid also has another atom or group of atoms bonded to the central atom known as the R group. There are 20 common amino acids present in proteins, each with a different R group. Variation in the amino acid sequence is responsible...
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Amines to Amides: Acylation of Amines01:19

Amines to Amides: Acylation of Amines

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Various carboxylic acid derivatives (such as acid chlorides, esters, and anhydrides) can be used for the acylation of amines to yield amides. The reaction requires two equivalents of amines. The first amine molecule functions as a nucleophile and attacks the carbonyl carbon to produce a tetrahedral intermediate. This is followed by the loss of the leaving group and restoration of the C=O bond.
Next, the second equivalent of amine serves as a Brønsted base and deprotonates the quaternary...
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Amino Acid Biosynthetic Pathways01:29

Amino Acid Biosynthetic Pathways

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Amino acid biosynthesis is essential for cell growth, protein synthesis, and metabolic regulation. Cells generate essential and non-essential amino acids from metabolic intermediates to sustain vital biological functions. These intermediates originate from key metabolic pathways: glycolysis, the tricarboxylic acid (TCA) cycle, and the pentose phosphate pathway. Important precursors include α-ketoglutarate, pyruvate, oxaloacetate, phosphoenolpyruvate, and erythrose-4-phosphate, which...
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Preparation of Amines: Alkylation of Ammonia and Amines01:30

Preparation of Amines: Alkylation of Ammonia and Amines

3.4K
Alkylation is one of the methods used to prepare amines. Direct alkylation of ammonia or a primary amine with an alkyl halide gives polyalkylated amines along with a quaternary ammonium salt through successive SN2 reactions. This process of making the quaternary salt through the direct alkylation method is called exhaustive alkylation.
Each alkylation step makes the nitrogen center more nucleophilic, which triggers successive alkylations until a quaternary ammonium salt is formed. Considering...
3.4K
Preparation of 1° Amines: Azide Synthesis01:22

Preparation of 1° Amines: Azide Synthesis

3.9K
Direct alkylation of ammonia produces polyalkylated amines, along with a quaternary ammonium salt. To exclusively prepare primary amines, the azide synthesis method can be used.
Azide ions act as good nucleophiles and react with unhindered alkyl halides to form alkyl azides. Alkyl azides do not participate in further nucleophilic substitution reactions, thereby eliminating the chances of polyalkylated products. Alkyl azides are reduced by hydride-based reducing agents, like lithium aluminum...
3.9K
Preparation of Amides01:29

Preparation of Amides

3.0K
Amides are synthesized by treating carboxylic acids with amines in the presence of dehydrating agents like dicyclohexylcarbodiimide (DCC).
The DCC-promoted synthesis of amides begins with the protonation of DCC by carboxylic acid. The protonation makes it a better acceptor. Next, the addition of carboxylate to the protonated carbodiimide gives a reactive acylating agent.
Subsequently, the amine acts as a nucleophile that attacks the acylating agent to form a tetrahedral intermediate. In the...
3.0K

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Advances in Amino Acid-Based Chemistry.

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Amino acid compounds and peptide derivatives show diverse uses in biomedicine and nanotechnology. These biomaterials offer versatile solutions for advanced scientific applications.

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Medicinal Chemistry

Background:

  • Recent literature highlights the expanding utility of amino acid-based compounds and peptide derivatives.
  • These molecules are increasingly recognized for their potential in various scientific domains.

Discussion:

  • The review synthesizes current research on the applications of these biomaterials.
  • It covers their roles in drug delivery, tissue engineering, and diagnostics.

Key Insights:

  • Amino acid derivatives offer tunable properties for targeted biomedical interventions.
  • Peptide-based nanomaterials demonstrate significant promise for advanced therapeutic strategies.
  • The synergy between amino acids and nanotechnology opens new avenues in materials science.

Outlook:

  • Future research will likely focus on enhancing the stability and efficacy of these compounds.
  • Further exploration of their biocompatibility and biodegradability is crucial.
  • The development of novel peptide-drug conjugates and nanostructures is anticipated.