从碳酸酸中直接合成双环[1.1.1]坦 (BCP) 酸盐
Yongchen Wang1, Jess C Tang1, Gang Wu2
1Department of Chemistry, Biosciences Research Collaborative, Rice University, Houston, TX, USA.
Nature communications
|February 23, 2026
概括
这项研究引入了一种新的,单步方法,可以直接从碳酸盐中合成双环[1.1.1] (BCP) 烯酸. 这种方法简化了对含有BCP的化合物的获取,可能加速药物发现.
科学领域:
- 有机合成 有机合成
- 药用化学 医学化学
- 摄影化学的使用.
背景情况:
- 自行车[1.1.1]坦 (BCP) 乙烯 Ester 是药品的关键中间体,具有增强的药物动力学特性.
- 目前的合成途径通常需要预先形成的氧化还原活性,从而限制了效率.
研究的目的:
- 开发一种通用,单步方法,直接将碳酸转化为BCP的乙烯.
- 探索直接合成中涉及的机械路径.
- 为了证明该方法在合成药物类似物中的实用性.
主要方法:
- 在DMSO中通过光照辐射在DMSO中使用[1.1.1]propellane和bis(pinacolato) diboron (B2pin2) 直接将碳酸转化为BCP乙烯.
- 调查反应动力学和产品产量,有和没有铁催化剂.
- 使用原子转移 (HAT) 和联到金属电荷转移 (LMCT) 路径分析的机制研究.
主要成果:
- 在一个单一的步骤中,成功合成BCP乙烯 Ester,直接从碳素酸中获得良好的产量.
- 随着铁催化剂的添加,观察到提高产量,这表明有协同的催化作用.
- 证明了广泛的基质范围和功能组对开发的合成方法的耐受性.
- 有效合成已批准药物的BCP类似物,布丁纳芬和布克利辛.
结论:
- 已经建立了一种新的,高效的,直接的方法来从碳酸酸中合成BCP乙烯 Ester.
- 通过铁催化增强的双HAT/LMCT机械路径,为合成化学提供了强大的工具.
- 这种方法具有显著的潜力,可以简化药物发现和开发过程.
相关概念视频
Hydroboration-Oxidation of Alkenes
11.7K
In addition to the oxymercuration–demercuration method, which converts the alkenes to alcohols with Markovnikov orientation, a complementary hydroboration-oxidation method yields the anti-Markovnikov product. The hydroboration reaction, discovered in 1959 by H.C. Brown, involves the addition of a B–H bond of borane to an alkene giving an organoborane intermediate. The oxidation of this intermediate with basic hydrogen peroxide forms an alcohol.
11.7K
Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation
21.6K
Introduction
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
21.6K
Regioselectivity and Stereochemistry of Hydroboration
9.6K
A significant aspect of hydroboration–oxidation is the regio- and stereochemical outcome of the reaction.
Hydroboration proceeds in a concerted fashion with the attack of borane on the π bond, giving a cyclic four-centered transition state. The –BH2 group is bonded to the less substituted carbon and –H to the more substituted carbon. The concerted nature requires the simultaneous addition of –H and –BH2 across the same face of the alkene giving syn stereochemistry.
Hydroboration proceeds in a concerted fashion with the attack of borane on the π bond, giving a cyclic four-centered transition state. The –BH2 group is bonded to the less substituted carbon and –H to the more substituted carbon. The concerted nature requires the simultaneous addition of –H and –BH2 across the same face of the alkene giving syn stereochemistry.
9.6K
Preparation of Alcohols via Addition Reactions
7.9K
Overview
The acid-catalyzed addition of water to the double bond of alkenes is a large-scale industrial method used to synthesize low-molecular-weight alcohols. An acidic atmosphere is required to allow the hydrogen in the water molecule to act as an electrophile and attack the double bond in an alkene. The addition of a proton to the double bond creates a carbocation intermediate. The proton preferentially bonds to the less substituted end of the double bond to create a more stable carbocation...
The acid-catalyzed addition of water to the double bond of alkenes is a large-scale industrial method used to synthesize low-molecular-weight alcohols. An acidic atmosphere is required to allow the hydrogen in the water molecule to act as an electrophile and attack the double bond in an alkene. The addition of a proton to the double bond creates a carbocation intermediate. The proton preferentially bonds to the less substituted end of the double bond to create a more stable carbocation...
7.9K
α-Bromination of Carboxylic Acids: Hell–Volhard–Zelinski Reaction
3.8K
The method to achieve α-brominated carboxylic acids using a mixture of phosphorus tribromide and bromine is known as the Hell–Volhard–Zelinski reaction. The reaction is catalyzed by phosphorus tribromide, which can be used directly or produced in situ from red phosphorus and bromine. The mechanism comprises PBr3 catalyzed conversion of acid to acid bromide and hydrogen bromide. The acid bromide enolizes to its enol form in the presence of HBr. The nucleophilic enol attacks the...
3.8K
Alkylation of β-Diester Enolates: Malonic Ester Synthesis
4.2K
Malonic ester synthesis is a method to obtain α substituted carboxylic acids from ꞵ-diesters such as diethyl malonate and alkyl halides.
4.2K


