合成 (2S,3R,4R) - 二氧化氨酸,用于阿马托克辛合成
Shambhu Deo Chandra1, Shanal Gunasekera1, Benjamin Philipp Noichl1
1Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1 Canada.
The Journal of organic chemistry
|August 21, 2024
概括
我们开发了一种简单的,不含金属的方法来合成二基异黄素 (DHIle),这是α-amanitin的关键毒性成分. 这一过程产生了受保护的DHIle,适合制造新的阿马托克辛类似物.
科学领域:
- 有机化学 有机化学
- 药用化学 医学化学
- 生物化学 生化学
背景情况:
- α-amanitin 是一种在中发现的强有力的毒素.
- 氨基酸 (2S,3R,4R) -4,5-二氧异氨酸 (DHIle) 对α-阿曼的毒性至关重要.
- 为了进一步研究,需要有效合成DHIle.
研究的目的:
- 开发一种精简的,没有过渡金属的 (2S,3R,4R) -4,5-二二氧化异黄素 (DHIle) 合成方法.
- 为了生产大量的DHIle,并为合成提供适当的保护.
- 为了将合成的DHIle纳入细胞毒性阿马托克辛类似物.
主要方法:
- 采用了一种新的,没有过渡金属的合成路径.
- 合成的重点是生产受保护的DHIle.
- 合成的DHIle被纳入了一个阿马托克辛模拟结构中.
主要成果:
- 实现了 (2S,3R,4R) -4,5-二氧异黄素 (DHIle) 的简化合成.
- 该方法是无过渡金属的,简化了过程并减少了潜在的污染.
- 产生了大量受保护的DHIle,适合用于合成.
- 证明了DHIle在细胞毒性阿马托克辛类似物中成功的结合.
结论:
- 开发的合成路线为DHIle.提供了高效的访问.
- 这种方法促进了DHIle的生产,用于构建新型阿马托克辛衍生物.
- 这些发现有助于开发新的细胞毒剂和研究α-amanitin毒性.
更多相关视频
相关概念视频
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...
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
Preparation of 1° Amines: Gabriel Synthesis
3.5K
Direct alkylation is not a suitable method for synthesizing amines because it produces polyalkylated products. Gabriel synthesis is the most preferred method to exclusively make primary amines. The method uses phthalimide, which contains a protected form of nitrogen that participates in alkylation only once to predominantly give primary amines.
Strong bases like NaOH or KOH deprotonate the phthalimide to form the corresponding anion, which acts as a nucleophile. Further, the anion attacks an...
Strong bases like NaOH or KOH deprotonate the phthalimide to form the corresponding anion, which acts as a nucleophile. Further, the anion attacks an...
3.5K
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
10.0K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
10.0K
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...
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
Alkylation of β-Diester Enolates: Malonic Ester Synthesis
3.4K
Malonic ester synthesis is a method to obtain α substituted carboxylic acids from ꞵ-diesters such as diethyl malonate and alkyl halides.
3.4K
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


