Iterative Design of a Biomimetic Catalyst for Amino Acid Thioester Condensation
作者:Huabin Wu、Handoko、Monika Raj、Paramjit S. Arora
DOI:10.1021/acs.orglett.7b02412
日期:2017.10.6
combines lessons learned from peptide biosynthesis, enzymes, and organocatalysts is described. The catalyst features a urea scaffold for carbonyl recognition and elements of nucleophilic catalysis. In the presence of 10 mol % of the organocatalyst, the rate of peptide bond formation is accelerated by 10000-fold over the uncatalyzed reaction between Fmoc-amino acid thioesters and amino acid methyl esters
Palladium-Catalyzed Carbonylative Synthesis of Aryl Selenoesters Using Formic Acid as an <i>Ex Situ</i> CO Source
作者:Danilo Yano de Albuquerque、Wystan K. O. Teixeira、Manoela do Sacramento、Diego Alves、Claudio Santi、Ricardo S. Schwab
DOI:10.1021/acs.joc.1c02608
日期:2022.1.7
A new catalytic protocol for the synthesis of selenoesters from aryl iodides and diaryl diselenides has been developed, where formic acid was employed as an efficient, low-cost, and safe substitute for toxic and gaseous CO. This protocol presents a high functional group tolerance, providing access to a large family of selenoesters in high yields (up to 97%) while operating under mild reaction conditions
已经开发了一种用于从芳基碘化物和二芳基二硒化物合成硒代酯的新催化方案,其中甲酸被用作有毒和气态 CO 的有效、低成本和安全的替代品。该协议具有高官能团耐受性,在温和的反应条件下以高产率(高达 97%)获得一大类硒代酯,避免使用难以操作、易氧化且气味难闻的硒醇。此外,通过首次使用二有机基二硫化物作为前体,该方法可以有效地扩展到具有中等至优异产率的硫酯的合成。
Formation of C(sp<sup>2</sup>)–S bonds through decarboxylation of α-oxocarboxylic acids with disulfides or thiophenols
Copper-catalyzed decarboxylative coupling between α-oxocarboxylic acids and diphenyl disulfides or thiophenols is presented, which provided an effective and direct approach for the preparation of useful thioesters through C(sp2)–S bond formation.
Synthesis of Thiol Esters Using Nano CuO/Ionic Liquid as an Eco-Friendly Reductive System Under Microwave Irradiation
作者:Juliano B. Azeredo、Marcelo Godoi、Ricardo S. Schwab、Giancarlo V. Botteselle、Antonio L. Braga
DOI:10.1002/ejoc.201300295
日期:2013.8
We report an efficient, fast, and environmentally friendly method for the synthesis of a wide range of thiolesters using stable diorganoyl disulfides and acyl chlorides, using CuO nanoparticles and [pmim]Br as the reductive system. This method gave good to excellent isolated yields of the desired products after only three minutes of microwave irradiation. Furthermore, by using the same green approach
The bimetallic reagent Sn(II)/Cu(II) in [bmim]BF4 was efficiently used for the cleavage of diaryldiselenides and disulfides and reacts with a variety of organic substrates, such as organic halides, acid chlorides, and β-amino mesylates affording the diorganyl selenides and sulfides within very short reaction times, under mild conditions and with excellent yields, using BMIM-BF4 as a reusable solvent