Silver-Catalyzed Radical Fluorination of Alkylboronates in Aqueous Solution
摘要:
We report herein an efficient and general method for the deboronofluorination of alkylboronates. Thus, with the catalysis of AgNO3, the reactions of various alkylboronic acids or their pinacol esters with Selectfluor reagent in acidic aqueous solution afforded the corresponding alkyl fluorides under mild conditions. A broad substrate scope and wide functional group compatibility were observed. A radical mechanism is proposed for this site-specific fluorination.
[EN] FUSED FURANS FOR THE TREATMENT OF HEPATITIS C<br/>[FR] FURANES FUSIONNÉS POUR LE TRAITEMENT DE L'HÉPATITE C
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2014159559A1
公开(公告)日:2014-10-02
The disclosure provides compounds of formula I or II, including their salts, as well as compositions and methods of using the compounds. The compounds have activity against hepatitis C virus (HCV) and may be useful in treating those infected with HCV. [
<i>B</i>-Alkyl Suzuki−Miyaura Cross-Coupling Reactions with Air-Stable Potassium Alkyltrifluoroborates
作者:Gary A. Molander、Chang-Soo Yun、María Ribagorda、Betina Biolatto
DOI:10.1021/jo0343331
日期:2003.7.1
palladium-catalyzed cross-coupling reaction of substitutedpotassium alkyltrifluoroborates with arylhalides and aryl triflates proceeds readily with moderate to good yields. The potassium alkyltrifluoroborates 1, 2, and 3a-e were easily synthesized and obtained as air-stable crystalline solids that can be stored for long periods of time. All of the cross-couplings proceed under the same reaction conditions using PdCl(2)(dppf)
Programmable Ether Synthesis Enabled by Oxa-Matteson Reaction
作者:Qiqiang Xie、Guangbin Dong
DOI:10.1021/jacs.2c03621
日期:2022.5.18
sequential oxygen and carbenoid insertions into diverse alkyl- and arylboronates. It offers a distinct entry to a wide range of boron-substituted ethers. The utilities of this method are demonstrated in the preparation of various functional ethers, the asymmetric synthesis of an acetyl-CoA-carboxylase inhibitor, and the programmable construction of polyethers.
The disclosure provides compounds of formula I or II, including their salts, as well as compositions and methods of using the compounds. The compounds have activity against hepatitis C virus (HCV) and may be useful in treating those infected with HCV.
Convergent Deboronative and Decarboxylative Phosphonylation Enabled by the Phosphite Radical Trap “BecaP”
作者:Santosh K. Pagire、Chao Shu、Dominik Reich、Adam Noble、Varinder K. Aggarwal
DOI:10.1021/jacs.3c06524
日期:2023.8.23
facile and efficient phosphonylation of alkyl radicals under visible light photocatalytic conditions. Importantly, the ambiphilic nature of BecaP allows redox neutral reactions with both nucleophilic (activated by single-electron oxidation) and electrophilic (activated by single-electron reduction) alkyl radical precursors. Thus, a broad scope of feedstock alkyl potassium trifluoroborate salts and redox
碳磷键的形成在合成化学中具有重要意义,因为含磷化合物具有许多不可或缺的生化作用。虽然有多种方法可以获取有机磷化合物,但将易于获取的烷基进行膦酰化以形成脂肪族膦酸酯的情况很少见,并且在合成中并不常用。在此,我们介绍了一种新型磷自由基捕获剂“BecaP”,它能够在可见光光催化条件下轻松有效地对烷基自由基进行磷酰化。重要的是,BecaP 的两亲性质允许与亲核(通过单电子氧化激活)和亲电(通过单电子还原激活)烷基自由基前体发生氧化还原中性反应。因此,可以使用多种原料烷基三氟硼酸钾盐和氧化还原活性羧酸酯,每一类底物都通过不同的机制途径进行。温和的条件适用于将膦酸酯基序安装到药物和天然产物中,这一点通过巴氯芬(肌肉松弛剂)直接转化为苯氯芬(GABA B 拮抗剂)来证明。