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Updated: Jun 13, 2026
08:55
Facile Protocol for the Synthesis of Self-assembling Polyamine-based Peptide Amphiphiles (PPAs) and Related Biomaterials
Published on: June 25, 2018
[Amides from Peperomia tetraphylla].
Yunzhi Li1, Zheng Gong, Chao Ma
1School of Tea and Food Science and Technology, Anhui Agriculturual University, Hefei 230036, China. yun126126@126.com
Summary
This study identified six novel amides from Peperomia tetraphylla, including aristololactams and tyramine derivatives. These chemical constituents were isolated for the first time from this plant species.
Area of Science:
- Phytochemistry
- Natural Products Chemistry
Context:
- Peperomia tetraphylla is a plant species with potential medicinal properties.
- Understanding its chemical profile is crucial for further research.
Purpose:
- To isolate and identify the chemical constituents present in the EtOAc-soluble portion of Peperomia tetraphylla.
- To characterize novel compounds for potential applications.
Summary:
- Six amide compounds were successfully isolated and purified using chromatographic techniques.
- The structures were elucidated through comprehensive spectral analysis, identifying aristololactam All, aristololactam B II, N-trans-feruloyltyramine, N-trans-sinapoyltyramine, N-trans-feruloylmethoxytyramine, and N-p-coumaroyltyramine.
- This marks the first reported isolation of these specific compounds from Peperomia tetraphylla.
Impact:
- Expands the known phytochemical database of the Peperomia genus.
- Provides a foundation for investigating the biological activities and potential therapeutic uses of these isolated amides.
- Contributes to the chemotaxonomic understanding of Peperomia species.
Related Concept Videos
01:07Amines: Introduction
Amines are organic derivatives of ammonia. They are formed by replacing one or more ammonia protons with alkyl or aryl groups. Depending upon the number of organyl groups bonded to nitrogen, amines are classified as primary, secondary, or tertiary. Primary amines have one organyl group attached to the nitrogen atom, while secondary and tertiary amines have two and three organyl groups attached to the nitrogen atom, respectively.
01:26Physical Properties of Amines
Amines with low molecular weight are usually gaseous at room temperature, while those with high molecular weight are liquid or solids in nature. Usually, low molecular weight amines have a rotten fish-like smell. Diamines typically have a pungent smell. For instance, cadaverine and putrescine, depicted in Figure 1, are two molecules responsible for decaying tissue.
01:19Amines to Amides: Acylation of Amines
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 amide...
Next, the second equivalent of amine serves as a Brønsted base and deprotonates the quaternary amide...
01:29Preparation of Amides
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...
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...
01:13Preparation of Amines: Reduction of Amides and Nitriles
Nitriles can be reduced to primary amines using reducing agents like lithium aluminum hydride or catalytic hydrogenation. The reduction introduces an amino group with an extra carbon in the skeleton. Nitriles are formed from the reaction between alkyl halides and sodium cyanide through the SN2 mechanism. Primary alkyl halides are the preferred substrates to prepare nitriles.
Amides can be reduced to primary, secondary, and tertiary amines using catalytic hydrogenation, active metals like Fe,...
Amides can be reduced to primary, secondary, and tertiary amines using catalytic hydrogenation, active metals like Fe,...
01:38Preparation of Amines: Reductive Amination of Aldehydes and Ketones
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.