使用DCC和HOBt作为H2O-THF中的激活剂合成小的实用方法,同时避免使用保护组
Karina Herrera-Guzmán1, Miguel Ángel Jaime-Vasconcelos1, Eréndira Torales1
1Instituto de Química, Universidad Nacional Autónoma de México Circuito Exterior, Ciudad Universitaria Ciudad de Mexico 04510 Mexico rjcp@unam.mx.
RSC advances
|December 20, 2024
概括
这项研究引入了一种使用最小保护组的新合成方法,减少反应时间并使试剂的直接再利用. 这种高效的方法简化了对生物活性分子的序列的创建.
科学领域:
- 有机化学 有机化学
- 生物化学 生物化学
- 合成化学 合成化学
背景情况:
- 合成传统上涉及保护组和合剂.
- 最少的保护群策略为更有效的合成提供了潜力.
- 当前的方法往往侧重于保护群体,而不是简化整体过程.
研究的目的:
- 开发一种高效的合成方法,使用最小的保护组.
- 为了减少反应时间和试剂在键形成中的使用.
- 为了创建一个简化的合成序列的流程.
主要方法:
- 在THF-H2O溶剂系统中使用了N,N'-Dicyclohexylcarbodiimide (DCC) 和1-Hydroxybenzotriazole (HOBt).
- 开发了一种方法,避免在氨基酸上使用保护组.
- 能够在连续的合步骤中重复使用HOBt.
- 从N端到C端合成.
主要成果:
- 通过避免保护组实现合成,显著减少反应时间.
- 证明了重复使用HOBt的能力,提高了该过程的经济和环境效率.
- 成功合成了可以直接用于随后的合反应的小序列.
- 探索桑萨尔瓦胺合成作为其他活性的模型.
结论:
- 开发的方法提供了一种简化和高效的合成方法.
- 避免保护组,并使试剂重复使用,简化了过程,减少了浪费.
- 这种N-to-C终端合成策略促进了复杂和生物相关分子的开发.
相关概念视频
01:01Acid Halides to Carboxylic Acids: Hydrolysis
2.5K
Hydrolysis of acid halides is a nucleophilic acyl substitution reaction in which acid halides react with water to give carboxylic acids. The reaction occurs readily and does not require acid or a base catalyst.
As shown below, the mechanism involves a nucleophilic attack by water at the carbonyl carbon to form a tetrahedral intermediate. This is followed by the reformation of the carbon–oxygen π bond along with the departure of a halide ion. A final proton transfer step yields carboxylic...
As shown below, the mechanism involves a nucleophilic attack by water at the carbonyl carbon to form a tetrahedral intermediate. This is followed by the reformation of the carbon–oxygen π bond along with the departure of a halide ion. A final proton transfer step yields carboxylic...
2.5K
01:29Preparation 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