甲基乙化将自然产品转化为不仅仅是衍生品
Ambili Sasikumar Athira1,2, Balan Abhijith3, M V Reshma1,2
1Agro-Processing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram, Kerala, India.
Natural product research
|March 22, 2024
概括
贝尼卡萨 (Benincasa) 希斯皮达提取物的乙烯化产生了一种独特的乙烯化hex-4-en-3-one化合物. 这一发现揭示了天然产品中α-二碳化合物的化学转化.
科学领域:
- 自然产品化学 自然产品化学
- 有机化学 有机化学
- 植物化学 植物化学
背景情况:
- 贝尼卡萨·希斯皮达 (Benincasa hispida) 是一种具有传统药用历史的植物.
- 了解药用植物的化学成分对于科学验证至关重要.
- 之前的研究已经探索了贝尼卡萨海斯皮达的各种提取物,但具体的化学转化仍在调查中.
研究的目的:
- 为了分离和表征由贝尼卡萨西斯皮达的甲醇提取物衍生出来的化合物.
- 为了研究在 peracetylation 过程中发生的化学转化途径.
- 阐明分离化合物及其前体的结构特征.
主要方法:
- 甲醇提取的贝宁卡萨 hispida.
- 原油提取物的甲基乙化反应.
- 使用色谱技术将目标化合物分离出来.
- 使用光谱方法 (例如,NMR,MS) 的结构阐明.
主要成果:
- 一种含有 peracetylated hex-4-en-3-one 骨干的化合物的分离.
- 作为化学转化产品的分离化合物的识别.
- 证据表明前体是一种α-二碳烯化合物.
结论:
- 这项研究成功地分离和表征了一种来自Benincasa hispida.的新甲基化化合物.
- 甲基乙化作为一种有价值的方法,可以从植物提取物中衍生和潜在地发现新的化学实体.
- 这些发现有助于理解本尼卡萨内化学反应和代谢途径.
相关概念视频
Phase II Reactions: Acetylation Reactions
223
Acetylation, a phase II biotransformation reaction, introduces an acetyl group to drugs or their metabolites. Acetyltransferase enzymes facilitate this reaction, which resembles α-amino acid conjugation due to the addition of a functional group to the drug molecule.
The substrates for acetylation are typically drugs or their metabolites with an amino, sulfonamide, or hydrazine functional group. Acetylation can occur at several points in the drug molecule, including primary, secondary, and...
The substrates for acetylation are typically drugs or their metabolites with an amino, sulfonamide, or hydrazine functional group. Acetylation can occur at several points in the drug molecule, including primary, secondary, and...
223
Amines to Amides: Acylation of Amines
2.4K
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...
Next, the second equivalent of amine serves as a Brønsted base and deprotonates the quaternary...
2.4K
Alkylation of β-Ketoester Enolates: Acetoacetic Ester Synthesis
3.3K
Acetoacetic ester synthesis is a method to obtain ketones from alkyl halides and β-keto esters. The reaction occurs in the presence of an alkoxide base that abstracts the acidic proton of the β-keto esters. The step results in an enolate ion which is doubly stabilized. The enolate then reacts with an alkyl halide via the SN2 process to produce an alkylated ester intermediate with a new C–C bond. The hydrolysis of the intermediate, followed by acidification, results in an...
3.3K
Nucleophilic Acyl Substitution of Carboxylic Acid Derivatives
3.2K
Nucleophilic acyl substitution is an important class of substitution reactions involving a nucleophile and an acyl compound, such as carboxylic acids and their derivatives. In these reactions, the leaving group attached to the acyl group is substituted by a nucleophile. The general mechanism proceeds via two steps.
3.2K
Preparation of Alkynes: Alkylation Reaction
10.1K
Introduction
Alkylation of terminal alkynes with primary alkyl halides in the presence of a strong base like sodium amide is one of the common methods for the synthesis of longer carbon-chain alkynes. For example, treatment of 1-propyne with sodium amide followed by reaction with ethyl bromide yields 2-pentyne.
Alkylation of terminal alkynes with primary alkyl halides in the presence of a strong base like sodium amide is one of the common methods for the synthesis of longer carbon-chain alkynes. For example, treatment of 1-propyne with sodium amide followed by reaction with ethyl bromide yields 2-pentyne.
10.1K
α-Hydroxy Ketones via Reductive Coupling of Esters: Acyloin Condensation Overview
2.9K
The pinacol and McMurry reactions involve the reductive coupling of ketones or aldehydes. Similarly, the bimolecular reductive coupling of two ester molecules in the presence of sodium metal in an aprotic solvent yields an α-hydroxy ketone product. The α-hydroxy ketone is also called acyloin, so the reaction is referred to as ‘acyloin condensation.’
2.9K


